# Top 100 Engineering Services companies in North America

Tamtam tracks 258 Engineering Services companies headquartered in North America. This list ranks the 100 largest by number of employees on LinkedIn, led by AtkinsRéalis, Black & Veatch and Kimley-Horn. Their median headcount is 642. Half of them were founded in 1981 or later. The most common headquarters are Montreal (7), Houston (5) and Calgary (3).

These North American engineering services companies range from large, established global firms to specialized mid-sized companies. They offer diverse expertise, including sustainable infrastructure solutions, critical human infrastructure development, and comprehensive planning and design consulting. Many firms emphasize innovation and sustainable practices across various sectors.

Notable companies include AtkinsRéalis, a global professional services organization in sustainable infrastructure; Black & Veatch, a leader in energy, water, and telecommunications infrastructure; Kimley-Horn, providing extensive planning and design consulting; and NV5, offering technology and consulting for sustainable infrastructure. A common pattern is the focus on integrated, multidisciplinary solutions for public and private sector clients.

🌍 North America · 100 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [AtkinsRéalis](https://www.tamtam.ai/c/atkinsrealis) (atkinsrealis.com)<br>Global professional services organization specializing in sustainable infrastructure solutions, integrating people, data, and technology across the asset lifecycle in key strategic sectors | Engineering Services | 🇨🇦 Montreal | 48,091 |  |
| 2 | [Black & Veatch](https://www.tamtam.ai/c/black-and-veatch) (bv.com)<br>An employee-owned global leader in building critical human infrastructure in Energy, Water, Telecommunications, and Government Services since 1915 | Engineering Services | 🇺🇸 Overland Park | 11,691 | 1915 |
| 3 | [Kimley-Horn](https://www.tamtam.ai/c/kimley-horn) (kimley-horn.com)<br>providing comprehensive planning and design consulting services across multiple disciplines with a client-focused approach and recognized workplace quality | Engineering Services | 🇺🇸 Raleigh | 10,392 | 1967 |
| 4 | [FieldCore](https://www.tamtam.ai/c/fieldcore) (fieldcore.com)<br>Global energy company specializing in power, wind, and electrification solutions, supported by advanced research, consulting, and financial services for a lower carbon future | Engineering Services | 🇺🇸 Atlanta | 4,952 | 2017 |
| 5 | [Cocacola Now](https://www.tamtam.ai/c/cocacola-now) (yahoo.com)<br>Lorem Ipsum provides standard dummy text for printing and typesetting, surviving for centuries and adapting to electronic and digital publishing | Engineering Services | 🇺🇸 Palo Alto | 3,968 | 1977 |
| 6 | [NV5](https://www.tamtam.ai/c/nv5) (nv5.com)<br>Provider of technology, conformity assessment, and consulting solutions for sustainable infrastructure, utility, and building assets Multiple verticals include engineering, environmental health, and geospatial services | Engineering Services | 🇺🇸 Hollywood | 3,633 | 1947 |
| 7 | [POWER Engineers](https://www.tamtam.ai/c/power-engineers) (wsp.com)<br>Global engineering firm providing integrated solutions for energy, food and beverage, facilities, communications, environmental, and federal markets with multidiscipline services | Engineering Services | 🇺🇸 Hailey | 3,392 |  |
| 8 | [CIMA+](https://www.tamtam.ai/c/cima-laval) (cima.ca)<br>Provides multidisciplinary consulting engineering services across Canada, focusing on excellence, innovation, and sustainable solutions for better living. | Engineering Services | 🇨🇦 Laval | 3,390 | 1990 |
| 9 | [ILF Consulting Engineers](https://www.tamtam.ai/c/ilf-consulting-engineers) (ilf.com)<br>Engineering and consulting firm providing technical expertise for industrial and infrastructure projects across energy, water, transportation, and sustainable industries worldwide. | Engineering Services | 🇺🇸 Worldwide | 3,272 |  |
| 10 | [Dewberry](https://www.tamtam.ai/c/dewberry) (dewberry.com)<br>A market-leading firm providing professional services to public and private sector clients, solving complex challenges, and transforming communities through innovation and expertise | Engineering Services | 🇺🇸 Fairfax | 2,914 | 1956 |
| 11 | [KCI](https://www.tamtam.ai/c/kci) (kci.com)<br>Employee-owned engineering firm providing multi-disciplined services in transportation, resource management, environmental, and construction to government, institutional, and private-sector clients nationwide | Engineering Services | 🇺🇸 Sparks | 2,900 | 1955 |
| 12 | [Scientific Research Corporation](https://www.tamtam.ai/c/scientific-research-corporation) (scires.com)<br>An engineering company founded in 1988, providing innovative solutions to US Government, private industry, and international markets with focus on information, communications, intelligence, and more | Engineering Services | 🇺🇸 Atlanta | 2,534 | 1988 |
| 13 | [UES](https://www.tamtam.ai/c/ues) (teamues.com)<br>A nationwide provider of engineering, environmental, testing, and inspection services, specializing in sustainable infrastructure solutions for public and private clients across various industries | Engineering Services | 🇺🇸 Orlando | 2,428 | 1964 |
| 14 | [Salas O'Brien](https://www.tamtam.ai/c/salas-o-brien) (salasobrien.com)<br>Employee-owned engineering firm focused on advancing the human experience through the built environment Top-ranked, with a strong emphasis on impact and sustainability | Engineering Services | 🇺🇸 Irvine | 2,295 | 1975 |
| 15 | [Olsson](https://www.tamtam.ai/c/olsson) (olsson.com)<br>An employee-owned engineering and design firm focused on improving communities through sustainable, connected, and efficient projects, driven by inspired people and purposeful designs | Engineering Services | 🇺🇸 Lincoln | 2,270 | 1956 |
| 16 | [Bowman Consulting](https://www.tamtam.ai/c/bowman-consulting) (bowman.com)<br>A national engineering services provider delivering infrastructure solutions to customers in various regulated end markets, with expertise in planning, engineering, and environmental consulting | Engineering Services | 🇺🇸 Reston | 2,221 | 1995 |
| 17 | [Core States Group](https://www.tamtam.ai/c/core-states-group) (core-states.com)<br>A collaborative team offering architecture, interior design, engineering, program management, and construction solutions nationwide, focused on facilitating a remarkable customer experience | Engineering Services | 🇺🇸 West Chester | 2,134 | 1999 |
| 18 | [Englobe](https://www.tamtam.ai/c/englobe) (englobecorp.com)<br>A leader in engineering, geosciences, environmental management, and quality services with 50+ years of experience, focused on employee safety and sustainability | Engineering Services | 🇨🇦 Quebec City | 1,980 | 1961 |
| 19 | [Pinnacle](https://www.tamtam.ai/c/pinnacle-pasadena) (pinnaclereliability.com)<br>A company based in Pasadena, focused on helping industrial facilities in oil and gas, chemical, mining, and water industries optimize data for improved performance | Engineering Services | 🇺🇸 Pasadena | 1,701 | 2006 |
| 20 | [Audubon Companies](https://www.tamtam.ai/c/audubon-companies) (auduboncompanies.com)<br>A leading provider of EPC, consulting, fabrication, and technical services for energy, chemicals, power, infrastructure, and industrial markets with a focus on sustainability | Engineering Services | 🇺🇸 Houston | 1,680 | 1997 |
| 21 | [BW Design Group](https://www.tamtam.ai/c/bw-design-group) (bwdesigngroup.com)<br>This company is a fully integrated engineering, architecture, construction, and consulting firm serving leading companies with customized solutions | Engineering Services | 🇺🇸 St. Louis | 1,676 | 1986 |
| 22 | [Qualus](https://www.tamtam.ai/c/qualus) (qualuscorp.com)<br>Innovative power services firm specializing in grid modernization, resiliency, sustainability, and software solutions for utilities, commercial, industrial, and government clients | Engineering Services | 🇺🇸 Usa | 1,668 |  |
| 23 | [Westwood Professional Services](https://www.tamtam.ai/c/westwood-professional-services) (westwoodps.com)<br>A dedicated team with over 50 years of experience creating a better world through energy grid transformation, resilient infrastructure design, and community development | Engineering Services | 🇺🇸 Plano | 1,660 | 1972 |
| 24 | [SSOE Group](https://www.tamtam.ai/c/ssoe-group) (ssoe.com)<br>Internationally recognized architecture and engineering firm specializing in providing high-quality project solutions for various industries with global reach | Engineering Services | 🇺🇸 Toledo | 1,634 | 1948 |
| 25 | [Walter P Moore](https://www.tamtam.ai/c/walter-p-moore) (walterpmoore.com)<br>A team of engineers and innovators designing high-performance structures and infrastructure globally, providing cost-efficient solutions that shape communities worldwide | Engineering Services | 🇺🇸 Houston | 1,340 | 1931 |
| 26 | [Pennoni](https://www.tamtam.ai/c/pennoni) (pennoni.com)<br>The firm partners with clients to deliver innovative, sustainable, and resilient engineering solutions, fostering long-term relationships focused on community impact | Engineering Services | 🇺🇸 Philadelphia | 1,317 | 1966 |
| 27 | [Pyrotek](https://www.tamtam.ai/c/pyrotek) (pyrotek.com)<br>Global engineering leader providing performance-improving technical solutions for industries like aluminium, glass, and automotive with a focus on innovation and customer satisfaction | Engineering Services | 🇺🇸 Spokane | 1,314 | 1956 |
| 28 | [Holtec International](https://www.tamtam.ai/c/holtec-international) (holtecinternational.com)<br>Global leader in designing and manufacturing custom energy equipment for nuclear, solar, geothermal, and fossil power generation, with a focus on integrity and innovation | Engineering Services | 🇺🇸 Jupiter | 1,313 | 1986 |
| 29 | [Moldtek Technologies Limited](https://www.tamtam.ai/c/moldtek-technologies-limited) (moldtekengineering.com)<br>Moldtek Technologies offers engineering design support globally across various industries, shaping solutions for clients with top-tier expertise and delivery centers in India | Engineering Services | 🇺🇸 Cumming | 1,296 | 2001 |
| 30 | [BPA](https://www.tamtam.ai/c/bpa-montreal) (bpa.ca)<br>An engineering firm specializing in mechanical, electrical, structural engineering, building science, and more for commercial, institutional, and industrial markets across Canada | Engineering Services | 🇨🇦 Montreal | 1,269 | 1956 |
| 31 | [RGBSI](https://www.tamtam.ai/c/rgbsi) (rgbsi.com)<br>Delivering engineering and quality solutions globally, bridging strategy and execution with in-house technologies to enhance performance and drive innovation | Engineering Services | 🇺🇸 Troy | 1,198 | 1997 |
| 32 | [Willdan](https://www.tamtam.ai/c/willdan) (willdan.com)<br>A consulting firm offering technical services in energy efficiency, engineering, public finance, and more to utilities, public agencies, and private industry nationwide | Engineering Services | 🇺🇸 Anaheim | 1,169 | 1964 |
| 33 | [Barnhart Crane & Rigging](https://www.tamtam.ai/c/barnhart-crane-and-rigging) (barnhartcrane.com)<br>Leading provider of crane rentals, heavy haul, and engineered rigging solutions across North America, specializing in complex industrial lifting and transportation projects. | Engineering Services | 🇺🇸 Memphis | 1,155 | 1969 |
| 34 | [Prime Controls](https://www.tamtam.ai/c/prime-controls) (prime-controls.com)<br>Industrial Automation company offering sole source solutions for system integration, I & C construction, project design, maintenance, and factory support services Customer-focused with commitment to excellence | Engineering Services | 🇺🇸 Lewisville | 1,095 | 2004 |
| 35 | [Bantrel Co.](https://www.tamtam.ai/c/bantrel-co) (bantrel.com)<br>Established in 1983, the company specializes in EPC/CM services for energy, mining & infrastructure projects, focusing on safety, quality, & efficiency Headquarters in Calgary, with operations across Canada and globally | Engineering Services | 🇨🇦 Calgary | 1,029 | 1983 |
| 36 | [Pond & Company](https://www.tamtam.ai/c/pond-and-company) (pondco.com)<br>A full-service consulting firm offering engineering, architecture, planning, and construction management solutions to public and private clients globally since 1965 | Engineering Services | 🇺🇸 Peachtree Corners | 1,003 | 1965 |
| 37 | [Dalkia UK](https://www.tamtam.ai/c/dalkia-uk) (dalkia.co.uk)<br>Delivering technical solutions for a sustainable future, specializing in energy, engineering, facilities management, and specialist services for private and public sector clients | Engineering Services | 🇺🇸 Staines-upon-Thames | 990 | 1993 |
| 38 | [Arcfield](https://www.tamtam.ai/c/arcfield) (arcfield.com)<br>Provider of systems engineering and integration services to US Intelligence Community and Department of Defense, with expertise in advanced engineering, IT, and analysis | Engineering Services | 🇺🇸 Chantilly | 949 | 2021 |
| 39 | [The Foth Companies](https://www.tamtam.ai/c/the-foth-companies) (foth.com)<br>A multidisciplinary firm providing innovative solutions in science, engineering, and technology, focused on client-centered service, collaboration, and delivering results | Engineering Services | 🇺🇸 De Pere | 895 | 1938 |
| 40 | [Mesa Associates, Inc](https://www.tamtam.ai/c/mesa-associates-inc) (mesainc.com)<br>Full service engineering firm specializing in serving electric utility, industrial, and government clients with expertise in power delivery and various engineering disciplines since 1988 | Engineering Services | 🇺🇸 Madison | 882 | 1988 |
| 41 | [Bechtel Plant Machinery, Inc. (BPMI)](https://www.tamtam.ai/c/bechtel-plant-machinery-inc-bpmi) (bpmionline.com)<br>Provides design, manufacturing, and procurement management for high-quality nuclear power plant components in submarines and aircraft carriers Also offers IT solutions | Engineering Services | 🇺🇸 Monroeville | 841 | 1956 |
| 42 | [KGS Group](https://www.tamtam.ai/c/kgs-group) (kgsgroup.com)<br>A multidisciplinary engineering consulting firm in North America, dedicated to excellence in engineering services for various markets with an employee-owned ethos | Engineering Services | 🇨🇦 Winnipeg | 820 | 1986 |
| 43 | [Norda Stelo](https://www.tamtam.ai/c/norda-stelo) (norda.com)<br>Canadian engineering firm specializing in integrated projects in transportation and various industries, committed to quality, innovation, value creation, and sustainability | Engineering Services | 🇨🇦 Quebec City | 805 | 1963 |
| 44 | [ENSCO, Inc.](https://www.tamtam.ai/c/ensco-inc) (ensco.com)<br>Provides leading-edge engineering, science, and advanced technology solutions to governments and private industries in aerospace, national security, and surface transportation sectors. | Engineering Services | 🇺🇸 Vienna | 745 | 1969 |
| 45 | [Allnorth Consultants Limited](https://www.tamtam.ai/c/allnorth-consultants-limited) (allnorth.com)<br>A multi-disciplinary engineering company providing project delivery and construction services in various sectors, focusing on collaborative and practical solutions | Engineering Services | 🇨🇦 Vancouver | 740 | 1995 |
| 46 | [DLB Associates](https://www.tamtam.ai/c/dlb-associates) (dlbassociates.com)<br>DLB Associates are MEP & Technology consulting engineers, offering personalized, adaptive solutions through imagination, expertise, agility, and practicality for clients | Engineering Services | 🇺🇸 Neptune | 722 | 1980 |
| 47 | [Fike Corporation](https://www.tamtam.ai/c/fike-corporation) (fike.com)<br>Designs and manufactures rupture discs, explosion protection, fire alarm, and suppression systems for global businesses seeking disaster prevention and safety assurance. | Engineering Services | 🇺🇸 Blue Springs | 692 | 1945 |
| 48 | [Algoworks](https://www.tamtam.ai/c/algoworks) (algoworks.com)<br>An IT powerhouse since 2006, leading digital transformations with expertise in Salesforce, Mobility, DevOps, and App Development for global businesses | Engineering Services | 🇺🇸 Ramsey | 662 | 2006 |
| 49 | [Wunderlich-Malec Engineering, Inc.](https://www.tamtam.ai/c/wunderlich-malec-engineering-inc) (wmeng.com)<br>An established engineering company specializing in solutions for industrial process plants, offering expertise, experience, and resources for critical control systems | Engineering Services | 🇺🇸 Eden Prairie | 661 | 1981 |
| 50 | [Artelia Canada](https://www.tamtam.ai/c/artelia-canada) (arteliagroup.ca)<br>Multidisciplinary engineering firm providing innovative solutions in mobility, energy, environment, water, industry, and telecom across Canada with global expertise. | Engineering Services | 🇨🇦 Montreal | 642 |  |
| 51 | [Averna](https://www.tamtam.ai/c/averna) (averna.com)<br>Global leader in Test & Quality Solutions, providing expertise in automated test equipment, vision inspection, precision assembly, and innovative solutions for various industries | Engineering Services | 🇨🇦 Montreal | 632 | 1999 |
| 52 | [RRC Companies](https://www.tamtam.ai/c/rrc-companies) (rrccompanies.com)<br>Top-tier engineering firm specializing in utility-scale renewable energy projects, offering comprehensive engineering services and dedicated to creating solutions that exceed expectations | Engineering Services | 🇺🇸 Round Rock | 617 | 2007 |
| 53 | [gbi](https://www.tamtam.ai/c/gbi) (gbi.ca)<br>With over 60 years of experience, we specialize in innovative and sustainable engineering solutions for various sectors, including residential, education, healthcare, and infrastructure | Engineering Services | 🇨🇦 Montreal | 614 | 1963 |
| 54 | [Enventure Engineering](https://www.tamtam.ai/c/enventure-engineering) (enventure.com)<br>A leading Engineering, Supply Chain, and Compliance solutions provider with expertise in engineering services, master data management, asset management, and compliance solutions | Engineering Services | 🇺🇸 Chicago | 603 | 1997 |
| 55 | [Saber Power](https://www.tamtam.ai/c/saber-power) (saberpower.com)<br>Engineering-led professional services company specializing in medium and high voltage electrical infrastructure Offering turnkey EPC, construction, maintenance, emergency response, training, and engineering services globally | Engineering Services | 🇺🇸 Houston | 597 | 2010 |
| 56 | [Cobb, Fendley & Associates, Inc.](https://www.tamtam.ai/c/cobb-fendley-and-associates-inc) (cobbfendley.com)<br>A Texas-based firm offering engineering, surveying, and infrastructure solutions for public and private sector clients, specializing in various professional services | Engineering Services | 🇺🇸 Houston | 577 | 1980 |
| 57 | [Middough Inc.](https://www.tamtam.ai/c/middough-inc) (middough.com)<br>A top US firm providing engineering, architectural, and management services worldwide for a range of industries since 1950 | Engineering Services | 🇺🇸 Cleveland | 575 | 1950 |
| 58 | [Eximietas Design](https://www.tamtam.ai/c/eximietas-design) (eximietas.design)<br>Leading technology consulting firm specializing in chip design, firmware development, embedded software, cloud computing, cyber security, and AI/ML solutions | Engineering Services | 🇺🇸 San Jose | 558 | 2023 |
| 59 | [Sterling Engineering](https://www.tamtam.ai/c/sterling-engineering) (sterling-engineering.com)<br>An award-winning company providing engineering project services and technical recruitment across industries, offering flexible solutions to clients since 1969 | Engineering Services | 🇺🇸 Westchester | 556 | 1969 |
| 60 | [Vanderweil Engineers](https://www.tamtam.ai/c/vanderweil-engineers) (vanderweil.com)<br>Engineering firm specializing in mechanical, electrical, plumbing, and sustainable design solutions for a wide range of projects, prioritizing client service and environmental impact | Engineering Services | 🇺🇸 Boston | 553 | 1950 |
| 61 | [Orbital Engineering, Inc.](https://www.tamtam.ai/c/orbital-engineering-inc) (orbitalengr.com)<br>Orbital Engineering provides full-service engineering, risk mitigation, and project delivery solutions tailored to meet customer needs across various industries | Engineering Services | 🇺🇸 Pittsburgh | 553 | 1969 |
| 62 | [Link Engineering Company](https://www.tamtam.ai/c/link-engineering-company) (linkeng.com)<br>Customized solutions provider with a focus on high value, manufacturing precision equipment, offering test services, research, simulation, quality control, and cutting tools | Engineering Services | 🇺🇸 Plymouth | 547 | 1935 |
| 63 | [LAPORTE](https://www.tamtam.ai/c/laporte) (laporteconsultants.com)<br>Specialized engineering firm providing process, building, and utility design solutions to Pharmaceutical, Agrifood, and Bioindustrial industries globally with long-term client relationships | Engineering Services | 🇨🇦 Montreal | 543 | 1999 |
| 64 | [CBCL Limited](https://www.tamtam.ai/c/cbcl-limited) (cbcl.ca)<br>Employee-owned multidisciplinary engineering with 60+ years of success Specializing in civil, structural, environmental, and more across Atlantic Canada | Engineering Services | 🇨🇦 Halifax | 540 | 1955 |
| 65 | [E2 Consulting Engineers, Inc.](https://www.tamtam.ai/c/e2-consulting-engineers-inc) (e2.com)<br>A minority-owned consulting firm offering professional services in engineering, environmental engineering, construction management, and staff augmentation to government and private-sector clients | Engineering Services | 🇺🇸 Emeryville | 533 | 1988 |
| 66 | [Indovance Inc](https://www.tamtam.ai/c/indovance-inc) (indovance.com)<br>A global provider of CAD, drafting, and business solutions for engineering design industries, offering expertise in mechanical, civil, architecture, signage, and pre-media services | Engineering Services | 🇺🇸 Apex | 531 | 2003 |
| 67 | [Butler Aerospace & Defense](https://www.tamtam.ai/c/butler-aerospace-and-defense) (butler.com)<br>Specializing in state-of-the-art, cost-optimized solutions, we cater to Aerospace, Defense, and Federal markets by offering high-end engineering talent and flexible business models | Engineering Services | 🇺🇸 Shelton | 521 | 1947 |
| 68 | [NV5 Data Centre & Mission Critical](https://www.tamtam.ai/c/nv5-data-centre-and-mission-critical) (nv5.com)<br>A trusted leader in mission-critical design and commissioning management, specializing in data centers and commercial real estate with a client-centric approach | Engineering Services | 🇺🇸 Hollywood | 520 | 1999 |
| 69 | [Jedson Engineering](https://www.tamtam.ai/c/jedson-engineering) (jedson.com)<br>A privately owned EPCm company delivering innovative projects that improve profitability, focusing on continuous improvement, employee empowerment, and partnership | Engineering Services | 🇺🇸 Cincinnati | 513 | 1984 |
| 70 | [R.V. Anderson Associates Limited](https://www.tamtam.ai/c/r-v-anderson-associates-limited) (rvanderson.com)<br>Innovative and collaborative professionals delivering engineering excellence for over 75 years, connecting people, projects, and planet with sustained outcomes | Engineering Services | 🇨🇦 Toronto | 512 | 1948 |
| 71 | [BR+A Consulting Engineers](https://www.tamtam.ai/c/br-a-consulting-engineers) (brplusa.com)<br>A leading MEP engineering firm with a nationwide presence, dedicated to creating high-performing buildings and fostering innovative design solutions for clients | Engineering Services | 🇺🇸 Boston | 501 | 1975 |
| 72 | [Keystone Engineering Inc](https://www.tamtam.ai/c/keystone-engineering-inc) (keystoneengr.com)<br>A multi-disciplined engineering firm offering innovative solutions in various industries with a focus on quality, safety, and cost-effectiveness | Engineering Services | 🇺🇸 Mandeville | 496 | 1988 |
| 73 | [SitelogIQ](https://www.tamtam.ai/c/sitelogiq) (sitelogiq.com)<br>Energy efficiency and facility solutions provider improving buildings for residential, educational, healthcare, commercial, and retail spaces to enhance comfort and productivity | Engineering Services | 🇺🇸 Minneapolis | 490 |  |
| 74 | [APD Global](https://www.tamtam.ai/c/apd-global) (apdglobal.com)<br>Specialist engineering solutions provider with expertise in power systems, transmission, substations, renewable energy connections, mining, and EPC/M construction across Australia and New Zealand | Engineering Services | 🇺🇸 Perth \| Barangaroo \| Brisbane \| Parramatta \| Melbourne \| Adelaide \| Darwin \| Townsville \| Hobart \| Wellington \| Auckland \| Newcastle | 469 | 1999 |
| 75 | [RFA Engineering](https://www.tamtam.ai/c/rfa-engineering) (rfamec.com)<br>Engineering services company serving Fortune 500 to start-ups, providing mechanical, software, and electrical design for various industries with a focus on client satisfaction | Engineering Services | 🇺🇸 Eden Prairie | 462 | 1961 |
| 76 | [Chemtex](https://www.tamtam.ai/c/chemtex) (chemtexus.com)<br>Global engineering and technology company specializing in value-added project solutions for clients in various industries through process engineering and technology transfer services | Engineering Services | 🇺🇸 Wilmington | 448 | 1958 |
| 77 | [Morrison Hershfield](https://www.tamtam.ai/c/morrison-hershfield) (stantec.com)<br>Delivering innovative projects globally Prioritizing client relationships Designing with community in mind Joining a company that shares values and mission | Engineering Services | 🇨🇦 Markham | 446 |  |
| 78 | [Energy Systems Group (ESG)](https://www.tamtam.ai/c/energy-systems-group-esg) (energysystemsgroup.com)<br>A leading sustainable energy solutions provider specializing in energy efficiency, sustainability, resiliency, and infrastructure improvement for various sectors | Engineering Services | 🇺🇸 Newburgh | 442 | 1994 |
| 79 | [Sheladia Associates, Inc.](https://www.tamtam.ai/c/sheladia-associates-inc) (sheladia.com)<br>A minority-owned consulting firm providing multidisciplinary services in infrastructure development, technical assistance, and project management worldwide to support economic growth | Engineering Services | 🇺🇸 Rockville | 440 | 1974 |
| 80 | [Sigma Technologies, Ltd.](https://www.tamtam.ai/c/sigma-technologies-ltd) (teamsigma.com)<br>An engineering and design firm with a 25-year legacy, focused on solving network technology and infrastructure challenges for internet and power customers | Engineering Services | 🇺🇸 Perrysburg | 439 | 1998 |
| 81 | [JMT Consultants Inc.](https://www.tamtam.ai/c/jmt-consultants-inc) (jmtconsultants.com)<br>A provider of steel and concrete design and detailing services, offering a range of solutions for engineering, fabrication, and construction projects | Engineering Services | 🇨🇦 Winnipeg | 438 | 2008 |
| 82 | [ALTEN Technology USA](https://www.tamtam.ai/c/alten-technology-usa) (altenusa.com)<br>An engineering services company providing solutions for engineering, technology, and product development projects across industries like aerospace, medtech, and automotive | Engineering Services | 🇺🇸 Greensboro | 435 | 1988 |
| 83 | [EVS, Inc.](https://www.tamtam.ai/c/evs-inc) (evs-eng.com)<br>Established in 1979, an engineering firm specializing in renewable energy Providing services for utility-scale solar plants, substations, and energy storage facilities nationwide | Engineering Services | 🇺🇸 Eden Prairie | 433 | 1979 |
| 84 | [DBR](https://www.tamtam.ai/c/dbr) (dbrinc.com)<br>Premier MEP engineering firm offering mechanical, electrical, and plumbing services, along with building commissioning and security system consulting in Texas | Engineering Services | 🇺🇸 Houston | 418 | 1972 |
| 85 | [Matrix Technologies, Inc.](https://www.tamtam.ai/c/matrix-technologies-inc) (matrixti.com)<br>Full-service provider of engineering, system integration, digital transformation, and construction services for various industries, with a focus on automation solutions and EPC excellence | Engineering Services | 🇺🇸 Maumee | 412 | 1980 |
| 86 | [PEG](https://www.tamtam.ai/c/peg) (pegenv.com)<br>Specializing in energy and environmental sustainability programs and policies, offering mechanical engineering, energy efficiency, and built environment consulting services to diverse industries | Engineering Services | 🇺🇸 Fairfax | 408 | 1998 |
| 87 | [SURVICE Engineering](https://www.tamtam.ai/c/survice-engineering) (survice.com)<br>A leading engineering firm providing unparalleled services in combat system safety, survivability, and effectiveness for the DoD, homeland security, and commercial markets | Engineering Services | 🇺🇸 Belcamp | 407 | 1981 |
| 88 | [Martin/Martin, Inc](https://www.tamtam.ai/c/martin-martin-inc) (martinmartin.com)<br>A full-service civil and structural engineering firm with multiple offices nationwide, providing quality services to various clients including municipalities, architects, and developers | Engineering Services | 🇺🇸 Lakewood | 406 | 1988 |
| 89 | [Burns Engineering, Inc.](https://www.tamtam.ai/c/burns-engineering-inc) (burns-group.com)<br>A respected provider of specialized engineering services for transportation, infrastructure, and built environment projects, with a focus on outstanding client service | Engineering Services | 🇺🇸 Philadelphia | 402 | 1960 |
| 90 | [Vantage Point Solutions](https://www.tamtam.ai/c/vantage-point-solutions) (vantagepnt.com)<br>Vantage Point helps broadband providers with engineering, consulting, and OSP services, securing funding, network design, implementation, cybersecurity, compliance, and more | Engineering Services | 🇺🇸 Mitchell | 396 | 2002 |
| 91 | [ICM Inc](https://www.tamtam.ai/c/icm-inc) (icminc.com)<br>A technology company based in Kansas, providing innovative solutions for agriculture and renewable energy, specializing in ethanol and feed technologies on a global scale | Engineering Services | 🇺🇸 Colwich | 395 | 1995 |
| 92 | [Mecanica](https://www.tamtam.ai/c/mecanica) (mecanicasolutions.com)<br>Global provider of engineering services for aerospace, automotive, and AEC industries Specializing in PLM/CAD/CAM solutions, onsite support, R&D, engineering services, and custom software development for clients | Engineering Services | 🇨🇦 Montreal | 393 | 1983 |
| 93 | [Mangan Inc.](https://www.tamtam.ai/c/mangan-inc) (manganinc.com)<br>An Automation & Engineering Firm serving industries like Refining, Gas & Oil, Biopharm, and more, offering services in lifecycle engineering, power distribution, and software solutions | Engineering Services | 🇺🇸 Long Beach | 393 | 1990 |
| 94 | [MCW Group of Companies](https://www.tamtam.ai/c/mcw-group-of-companies) (mcw.com)<br>A reputable provider of consulting engineering, energy management, and development services that create efficient and sustainable environments for various purposes | Engineering Services | 🇨🇦 Toronto | 391 | 1964 |
| 95 | [PROtect LLC](https://www.tamtam.ai/c/protect-llc) (protect.llc)<br>PROtect specializes in providing safety, reliability, and compliance services to a variety of industries across the United States to mitigate risks | Engineering Services | 🇺🇸 Wichita | 390 | 2020 |
| 96 | [ERT](https://www.tamtam.ai/c/ert-greenbelt) (ertcorp.com)<br>Providing high-value engineering and scientific solutions to U.S. Federal agencies, specializing in satellite data and contested space domain challenges. | Engineering Services | 🇺🇸 Greenbelt | 389 | 1993 |
| 97 | [ATG Europe](https://www.tamtam.ai/c/atg-europe) (atg-europe.com)<br>ATG Europe provides engineering services, 3D images, VR&AR experiences, and management support for space and nuclear energy clients, accelerating innovation | Engineering Services | 🇺🇸 Noordwijk | 388 | 1969 |
| 98 | [Vista Projects](https://www.tamtam.ai/c/vista-projects) (vistaprojects.com)<br>Integrated industrial engineering firm specializing in digital transformation of projects and operations, with a focus on efficient designs and project execution | Engineering Services | 🇨🇦 Calgary | 385 | 1985 |
| 99 | [ANS](https://www.tamtam.ai/c/ans) (ansgeo.com)<br>Family-owned Engineering Consulting Firm providing civil, geotechnical, structural, environmental, and construction engineering services, as well as geophysical surveys, construction monitoring, drilling, and materials testing | Engineering Services | 🇺🇸 South Plainfield | 370 | 2005 |
| 100 | [Entuitive](https://www.tamtam.ai/c/entuitive) (entuitive.com)<br>This company specializes in structural engineering, building envelope, restoration, and special projects consulting across various sectors, utilizing advanced technology for efficient design solutions globally | Engineering Services | 🇨🇦 Calgary | 366 | 2011 |

## How this list is built

Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 12, 2026.

## More company lists in North America

- [The largest companies in North America](https://www.tamtam.ai/l/largest-companies-in-north-america) (119,523)
- [Multinational companies in North America](https://www.tamtam.ai/l/multinational-companies-in-north-america) (18,660)
- [Manufacturers in North America](https://www.tamtam.ai/l/manufacturers-in-north-america) (10,136)
- [Education providers in North America](https://www.tamtam.ai/l/education-companies-in-north-america) (8,464)
- [Retail chains in North America](https://www.tamtam.ai/l/retail-chains-in-north-america) (8,234)
- [Financial services firms in North America](https://www.tamtam.ai/l/financial-services-firms-in-north-america) (7,764)
- [Companies with in-house R&D in North America](https://www.tamtam.ai/l/r-and-d-companies-in-north-america) (7,619)
- [Critical infrastructure operators in North America](https://www.tamtam.ai/l/critical-infrastructure-operators-in-north-america) (6,768)
- [Hardware manufacturers in North America](https://www.tamtam.ai/l/hardware-companies-in-north-america) (5,985)
- [Financial Services companies in North America](https://www.tamtam.ai/l/financial-services-companies-in-north-america) (5,616)
- [Public sector organisations in North America](https://www.tamtam.ai/l/public-sector-organisations-in-north-america) (5,041)
- [Higher Education companies in North America](https://www.tamtam.ai/l/higher-education-companies-in-north-america) (3,953)
- [Construction companies in North America](https://www.tamtam.ai/l/construction-companies-in-north-america) (3,792)
- [Energy companies in North America](https://www.tamtam.ai/l/energy-companies-in-north-america) (3,543)
- [Publicly traded companies in North America](https://www.tamtam.ai/l/publicly-traded-companies-in-north-america) (3,538)
- [Family-owned companies in North America](https://www.tamtam.ai/l/family-owned-companies-in-north-america) (3,387)
- [Corporate groups and holding companies in North America](https://www.tamtam.ai/l/holding-companies-in-north-america) (3,311)
- [Distributors and wholesalers in North America](https://www.tamtam.ai/l/distributors-and-wholesalers-in-north-america) (3,208)
- [Hotel and hospitality groups in North America](https://www.tamtam.ai/l/hospitality-groups-in-north-america) (3,148)
- [E-commerce companies in North America](https://www.tamtam.ai/l/ecommerce-companies-in-north-america) (2,944)
- [Logistics companies in North America](https://www.tamtam.ai/l/logistics-companies-in-north-america) (2,701)
- [Insurance companies in North America](https://www.tamtam.ai/l/insurance-companies-in-north-america) (2,622)
- [Government Administration companies in North America](https://www.tamtam.ai/l/government-administration-companies-in-north-america) (2,495)
- [Retail companies in North America](https://www.tamtam.ai/l/retail-companies-in-north-america) (2,407)

## The same list elsewhere

- [Engineering Services companies in the world](https://www.tamtam.ai/l/engineering-services-companies-in-the-world) (1,150)
- [Engineering Services companies in the United States](https://www.tamtam.ai/l/engineering-services-companies-united-states) (203)
- [Engineering Services companies in Canada](https://www.tamtam.ai/l/engineering-services-companies-canada) (48)

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Source: https://www.tamtam.ai/l/engineering-services-companies-in-north-america