This selection of professional services firms in Portland includes a mix of established companies and those founded in the early 2000s. The sector is notably diverse, encompassing IT services, design, environmental consulting, civil engineering, and legal practices. Many of these firms, such as Woodard & Curran and David Evans and Associates, Inc., focus on engineering and environmental solutions, indicating a strong regional presence in infrastructure and sustainability.
Key companies include ieSolutions, which provides IT staffing and consulting; INDUSTRY, a global brand consultancy; BerryDunn, offering assurance, tax, and consulting services; and Stoel Rives LLP, a corporate and litigation law firm. A common thread among these firms is their headquarters in Portland, highlighting the city as a hub for professional services across various specializations.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
ieSolutionsie4solutions.com
ieSolutions offers staffing services for IT projects and consulting services for planning, project management, system assessment, system delivery, and methodology implementation aligned with business priorities |
1,932 | |||
| 2 |
INDUSTRYindustry.global
A global brand consultancy specializing in defining white space, creating authentic storytelling, and bringing ideas to life with strategic creativity |
1,457 | |||
| 3 |
Woodard & Curranwoodardcurran.com
Integrated firm specializing in water and environmental projects, offering tailored solutions through science, engineering, design-build, operations, and collaborative partnerships with clients |
1,148 | |||
| 4 |
David Evans and Associates, Inc.deainc.com
A leader in progressive design solutions for transportation, land development, energy, and water projects nationwide, with a diverse team of professionals |
1,084 | |||
| 5 |
BerryDunn โ Assurance, Tax and Consultingberrydunn.com
A nationally recognized firm providing assurance, tax, and consulting services to help clients create, grow, and protect value with exceptional service |
1,049 | |||
| 6 |
Stoel Rives LLPstoel.com
A leading US corporate and litigation law firm with over 325 attorneys offering services in energy, natural resources, compliance, counseling, deals, and disputes |
890 | |||
| 7 |
ZGF Architectszgf.com
ZGF is a design firm rooted in Oregon, focusing on creating sustainable, community-oriented projects across North America with a humanistic approach |
857 | |||
| 8 |
Prialtoprialto.com
Prialto offers subscription staffing for remote executive assistants, managing tasks like scheduling, email, travel, and CRM contact to amplify productivity |
813 | |||
| 9 |
Certified Languages Internationalcertifiedlanguages.com
A language company offering on-demand interpreting services in over 230 languages, with professional interpreters available 24/7 and skilled in industry-specific terminology |
795 | |||
| 10 |
PAEpae-engineers.com
An engineering firm specializing in mechanical, electrical, and technology system design, with a focus on sustainability, regenerative engineering, and community impact |
783 | |||
| 11 |
Hackerhackerarchitects.com
A studio of architects creating spaces that connect us to the landscape, each other, and ourselves with honesty, sustainability, and beauty |
689 | |||
| 12 | 500 | ||||
| 13 |
Aldrichaldrichadvisors.com
Providing financial, wealth, tax, and business transition strategies for clients across the West Coast for over 50 years |
452 | |||
| 14 |
Schwabeschwabe.com
Provides industry-focused legal services to clients from start-ups to Fortune 500 companies, offering ideas, advice, and exceptional legal counsel. |
431 | |||
| 15 |
Instrumentinstrument.com
Digital-first design agency creating brands, products, websites, and campaigns through creative technology partnerships with ambitious global companies for over twenty years. |
423 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 16 |
Tilsontilsontech.com
A multi-specialty telecommunications services firm with over 25 years of experience building and maintaining information infrastructure for various clients nationwide |
422 | |||
| 17 |
Kittelson & Associates, Inc.kittelson.com
Solve complex transportation problems through planning, operations, design, and research to improve communities and everyday lives nationwide. |
420 | |||
| 18 |
Miller Nash LLPmillernash.com
A leading law firm with over 150 years of success, providing industry-focused legal services in multiple states, prioritizing client satisfaction and innovative solutions |
376 | |||
| 19 |
Mackenziemackenzie.inc
Leaders in design, committed to diversity, community, equity, sustainability Strong culture of friendship, resiliency, and creative problem-solving Over 60 years of experience |
368 | |||
| 20 |
American Chaseamericanchase.com
A recruitment-centric talent acquisition company providing staffing services, IT solutions, and professional services to Fortune 500 clients across various industries |
348 | |||
| 21 |
Pierce Atwood LLPpierceatwood.com
A full-service law firm based in New England with 150 attorneys serving regional, national, and international clients in various industries |
324 | |||
| 22 |
Baker Newman Noyesbnncpa.com
One of the top 100 accounting and consulting firms, specializing in banking, healthcare, manufacturing, not-for-profit, public sector, and family-owned businesses |
321 | |||
| 23 |
Cascade Energycascadeenergy.com
Cascade Energy specializes in industrial energy efficiency solutions, offering program design, carbon tracking, engineering services, software, and training to help clients achieve sustainability goals |
313 | |||
| 24 |
Stone Coast Fund Servicesstone-coast.com
Professional services firm in Maine and Cayman Islands providing independent fund administration services to onshore and offshore hedge funds globally |
234 | |||
| 25 |
Ankrom Moisanankrommoisan.com
Ankrom Moisan collaborates in architecture, interior design, urban planning, and brand identity to create impactful spaces across the West Coast |
219 | |||
| 26 |
Drummond Woodsumdwmlaw.com
Full-service law firm with over 100 attorneys offering a wide range of legal services to corporations, financial institutions, tribal nations, municipalities, and individuals |
186 | |||
| 27 |
Accordance Search Groupaccordancesearchgroup.com
Connecting sales talent with companies. Specializing in recruiting and placing sales professionals, ensuring successful matches for hiring managers' needs. |
58 | |||
| 28 |
S&F Land Servicessflands.com
Provides land surveying and remote sensing services, including imagery and LiDAR, to engineers, project owners, representatives, and public infrastructure agencies across the Western United States. |
51 | |||
| 29 |
Alta Planning + Designaltago.com
Consulting firm specializing in bicycle, pedestrian, trail, park, greenway, and roadway planning, design, engineering, and outreach programs. |
51 | |||
| 30 |
LEVER Architectureleverarchitecture.com
Design-focused architecture firm in Portland and Los Angeles, emphasizing sustainability, innovation, and equity in creating buildings and environments that enhance the human experience |
27 | |||
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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 Portland
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- Education providers in Portland 30
- Healthcare providers in Portland 30
- Consulting firms in Portland 28
- Construction companies in Portland 28
- E-commerce companies in Portland 25
The same list elsewhere in United States
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