# The 30 largest professional services firms in Calgary

Tamtam tracks 55 professional services firms headquartered in Calgary. This list ranks the 30 largest by number of employees on LinkedIn, led by MNP, Precision Drilling and Critical Mass. Their median headcount is 346. Half of them were founded in 1996 or later.

This selection of professional services firms in Calgary represents a mix of established companies and those founded more recently. Many of these firms, such as Precision Drilling and Equinox Engineering, operate in the oil and gas sector, while others like Critical Mass (digital agency) and S.i. Systems (IT staffing) focus on technology and digital solutions. The presence of companies like MNP (accounting) and Bennett Jones (law) highlights the city's strong professional services foundation.

The data shows a notable concentration of engineering services, with firms like DIALOG, Bantrel Co., and Vista Projects providing specialized expertise in areas ranging from urban planning to industrial engineering. This suggests a robust demand for technical and design solutions within the region, extending to environmental and infrastructure projects.

🇨🇦 Calgary · 30 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [MNP](https://www.tamtam.ai/c/mnp) (mnp.ca)<br>A leading national accounting, tax, and business consulting firm in Canada, offering personalized strategies and partner-led engagements to help organizations succeed | Accounting | 🇨🇦 Calgary | 9,798 |  |
| 2 | [Precision Drilling](https://www.tamtam.ai/c/precision-drilling) (precisiondrilling.com)<br>A leading provider of safe and high-performance services to the oil and gas industry, offering drilling rigs, technology solutions, environmental stewardship, and support services | Oil and Gas | 🇨🇦 Calgary | 2,802 |  |
| 3 | [Critical Mass](https://www.tamtam.ai/c/critical-mass) (criticalmass.com)<br>Designing brand experiences, full-service digital agency, global presence, working with top brands, data-driven approach, focus on customer experience and innovative technologies | Advertising Services | 🇨🇦 Calgary | 1,810 | 1996 |
| 4 | [DIALOG](https://www.tamtam.ai/c/dialog-calgary) (dialogdesign.ca)<br>Architects, urban planners, engineers, and landscape architects collaboratively improve communities and the environment through design and multidisciplinary solutions for urban vibrancy, health, and transportation. | Design Services | 🇨🇦 Calgary | 1,224 | 1960 |
| 5 | [Bennett Jones](https://www.tamtam.ai/c/bennett-jones) (bennettjones.com)<br>An internationally recognized Canadian law firm with over 500 lawyers, specializing in various sectors such as mergers and acquisitions, energy, finance, litigation, and public policy | Law Practice | 🇨🇦 Calgary | 1,184 | 1922 |
| 6 | [AGAT Laboratories](https://www.tamtam.ai/c/agat-laboratories) (agatlabs.com)<br>Specialized Canadian provider of analytical solutions globally, offering accurate and timely services in various industries including environmental, mining, petroleum, and food testing | Professional Services | 🇨🇦 Calgary | 1,034 | 1979 |
| 7 | [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 |
| 8 | [S.i. Systems](https://www.tamtam.ai/c/s-i-systems) (sisystems.com)<br>Canada's largest IT staffing agency connecting professionals with opportunities, helping individuals and businesses prosper through a 300,000-strong member network | Staffing and Recruiting | 🇨🇦 Calgary | 525 | 1994 |
| 9 | [MNC (Martin Newby Consulting Ltd.)](https://www.tamtam.ai/c/mnc-martin-newby-consulting-ltd) (mncl.ca)<br>A geomatics engineering firm specializing in cadastral and parcel mapping, offering innovative data collection and geomatics solutions to clients worldwide | IT Services and IT Consulting | 🇨🇦 Calgary | 476 | 1998 |
| 10 | [Equinox Engineering Ltd.](https://www.tamtam.ai/c/equinox-engineering-ltd) (equinox-eng.com)<br>A global leader in EPCM services, specializing in gas processing, oil production, and sustainable energy solutions with a focus on quality and sustainability | Oil and Gas | 🇨🇦 Calgary | 447 | 1997 |
| 11 | [Alinea International](https://www.tamtam.ai/c/alinea-international) (alineainternational.com)<br>Providing technical and management expertise to governments, investors, companies, and communities for sustainable development and lasting positive change worldwide. | Business Consulting and Services | 🇨🇦 Calgary | 389 | 1986 |
| 12 | [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 |
| 13 | [Primary Engineering and Construction](https://www.tamtam.ai/c/primary-engineering-and-construction) (primaryeng.com)<br>An engineering and construction leader specializing in electrical distribution, transmission, substation, and telecommunications services, with a focus on customer satisfaction and project management | Utilities | 🇨🇦 Calgary | 371 | 2002 |
| 14 | [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 |
| 15 | [Micro Engineering Tech Inc](https://www.tamtam.ai/c/micro-engineering-tech-inc) (microengineering.ca)<br>A leading Geomatics and Engineering company offering consulting and product services for Oil & Gas, Construction, and digital infrastructure sectors | Surveying and Mapping Services | 🇨🇦 Calgary | 346 | 2010 |
| 16 | [Obsidian Engineering](https://www.tamtam.ai/c/obsidian-engineering) (obsidianeng.ca)<br>A full-service EPCM with a small, experienced team providing efficient and cost-effective solutions for small to medium projects in the oil and gas industry | Oil and Gas | 🇨🇦 Calgary | 313 |  |
| 17 | [Phasor Engineering Inc](https://www.tamtam.ai/c/phasor-engineering-inc) (phasorengineering.ca)<br>A technological leader in high voltage substation engineering, offering full-service engineering, commissioning, and panel fabrication services with single-source responsibility | Business Consulting and Services | 🇨🇦 Calgary | 272 | 2004 |
| 18 | [Burnet, Duckworth & Palmer LLP](https://www.tamtam.ai/c/burnet-duckworth-and-palmer-llp) (bdplaw.com)<br>A boutique law firm in Calgary with innovative legal minds, specializing in corporate and litigation matters for clients in various sectors | Legal Services | 🇨🇦 Calgary | 267 |  |
| 19 | [FBC Farm and Small Business Tax Consultants](https://www.tamtam.ai/c/fbc-farm-and-small-business-tax-consultants) (fbc.ca)<br>Specializing in farm and small business taxes, we offer year-round tax planning, on-site preparation, consultation, and audit protection services | Financial Services | 🇨🇦 Calgary | 258 | 1952 |
| 20 | [Sproule](https://www.tamtam.ai/c/sproule) (sproule.com)<br>Global energy consulting firm providing trusted and independent analysis, optimizing operational performance, and advising on M&A transactions and energy markets Headquarters in Calgary | Oil and Gas | 🇨🇦 Calgary | 257 | 1951 |
| 21 | [Scovan](https://www.tamtam.ai/c/scovan) (scovan.ca)<br>Providing engineering, procurement, and construction management services for the energy industry, specializing in industrial facilities for heavy oil, oil and gas, and renewable energy projects | Oil and Gas | 🇨🇦 Calgary | 245 | 2010 |
| 22 | [Matrix Solutions Inc.](https://www.tamtam.ai/c/matrix-solutions-inc) (onterris.com)<br>A leading provider of environmental consulting and engineering services, delivering innovative solutions for infrastructure, energy, oil & gas, and mining sectors globally | Environmental Services | 🇨🇦 Calgary | 221 | 1984 |
| 23 | [Tetranex Solutions Inc.](https://www.tamtam.ai/c/tetranex-solutions-inc) (tetranex.com)<br>A multi-discipline engineering specializing in industrial automation, electrical systems, process engineering, and instrumentation solutions for various industries with extensive project implementation experience | Engineering Services | 🇨🇦 Calgary | 197 | 2010 |
| 24 | [Aplin](https://www.tamtam.ai/c/aplin) (aplin.com)<br>A Canadian staffing and recruiting agency with over 45 years of experience, connecting talent with employers to drive business growth and advance careers | Staffing and Recruiting | 🇨🇦 Calgary | 191 | 1975 |
| 25 | [primeHR Inc.](https://www.tamtam.ai/c/primehr-inc) (primehr.ca)<br>Specialized compensation administration and outsourcing consulting for small to mid-sized companies in Alberta, Canada, focusing on employee compensation plans and program management | Human Resources Services | 🇨🇦 Calgary | 182 | 2013 |
| 26 | [Irwin's Safety and Industrial Labour Services Ltd](https://www.tamtam.ai/c/irwin-s-safety-and-industrial-labour-services-ltd) (irwinsafety.com)<br>Industrial workforce and safety training provider for the oil and gas industry, specializing in plant turnarounds, technical services, safety consulting, and safety training | Utilities | 🇨🇦 Calgary | 175 | 2009 |
| 27 | [ASCENT](https://www.tamtam.ai/c/ascent-calgary) (ascnltd.com)<br>A Canadian company providing engineering services for the oil and gas industry, specializing in facility planning, design, construction, and operational support | Engineering Services | 🇨🇦 Calgary | 53 | 1994 |
| 28 | [Journey Engineering Corporation](https://www.tamtam.ai/c/journey-engineering-corporation) (journeyengineering.com)<br>A progressive consulting firm specializing in civil, process, mechanical, and electrical engineering services for the energy industry Building successful assets collaboratively | Oil and Gas | 🇨🇦 Calgary | 52 | 2015 |
| 29 | [GBL](https://www.tamtam.ai/c/gbl) (gblinc.ca)<br>A leading provider of retirement, health, taxation, and administrative outsourcing services, specializing in Individual Pension Plans, Retirement Compensation Arrangements, and Health Benefit Plans | Financial Services | 🇨🇦 Calgary | 51 | 1995 |
| 30 | [Integrated Geomatics](https://www.tamtam.ai/c/integrated-geomatics) (integratedgeomatics.com)<br>Offers comprehensive Geomatics and Environmental solutions, integrating assessments, regulatory strategy, design, surveying, remote sensing, and GIS mapping for client projects from feasibility to construction. | Oil and Gas | 🇨🇦 Calgary | 45 | 2009 |

## 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 11, 2026.

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## The same list elsewhere in Canada

- [Professional services firms in Canada](https://www.tamtam.ai/l/professional-services-firms-canada) (481)
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- [Professional services firms in Vancouver](https://www.tamtam.ai/l/professional-services-firms-vancouver) (34)

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Source: https://www.tamtam.ai/l/professional-services-firms-calgary