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Top 30 professional services firms in Portland

Tamtam tracks 48 professional services firms headquartered in Portland. This list ranks the 30 largest by number of employees on LinkedIn, led by ieSolutions, INDUSTRY and Woodard & Curran. Their median headcount is 423. Half of them were founded in 1985 or later.

๐Ÿ‡บ๐Ÿ‡ธ Portland30 companiesUpdated Nov 12, 2026

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.

#CompanyIndustryHeadquarters EmployeesFounded
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

IT Services and IT Consulting ๐Ÿ‡บ๐Ÿ‡ธ Portland 1,932 2002
2
INDUSTRYindustry.global

A global brand consultancy specializing in defining white space, creating authentic storytelling, and bringing ideas to life with strategic creativity

Design Services ๐Ÿ‡บ๐Ÿ‡ธ Portland 1,457 2011
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

Environmental Services ๐Ÿ‡บ๐Ÿ‡ธ Portland 1,148 1979
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

Civil Engineering ๐Ÿ‡บ๐Ÿ‡ธ Portland 1,084 1976
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

Accounting ๐Ÿ‡บ๐Ÿ‡ธ Portland 1,049 1974
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

Law Practice ๐Ÿ‡บ๐Ÿ‡ธ Portland 890 1907
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

Architecture and Planning ๐Ÿ‡บ๐Ÿ‡ธ Portland 857 1942
8
Prialtoprialto.com

Prialto offers subscription staffing for remote executive assistants, managing tasks like scheduling, email, travel, and CRM contact to amplify productivity

Staffing and Recruiting ๐Ÿ‡บ๐Ÿ‡ธ Portland 813 2008
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

Translation and Localization ๐Ÿ‡บ๐Ÿ‡ธ Portland 795 1996
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

Architecture and Planning ๐Ÿ‡บ๐Ÿ‡ธ Portland 783 1967
11
Hackerhackerarchitects.com

A studio of architects creating spaces that connect us to the landscape, each other, and ourselves with honesty, sustainability, and beauty

Architecture and Planning ๐Ÿ‡บ๐Ÿ‡ธ Portland 689 1983
12
Otakotak.com

A Pacific Northwest-based company focused on urban growth planning, sustainable design, and transportation solutions, prioritizing community, diversity, and innovation

Design Services ๐Ÿ‡บ๐Ÿ‡ธ Portland 500 1981
13
Aldrichaldrichadvisors.com

Providing financial, wealth, tax, and business transition strategies for clients across the West Coast for over 50 years

Professional Services ๐Ÿ‡บ๐Ÿ‡ธ Portland 452 1973
14
Schwabeschwabe.com

Provides industry-focused legal services to clients from start-ups to Fortune 500 companies, offering ideas, advice, and exceptional legal counsel.

Law Practice ๐Ÿ‡บ๐Ÿ‡ธ Portland 431 n/a
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.

Marketing Services ๐Ÿ‡บ๐Ÿ‡ธ Portland 423 2005

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16
Tilsontilsontech.com

A multi-specialty telecommunications services firm with over 25 years of experience building and maintaining information infrastructure for various clients nationwide

Telecommunications ๐Ÿ‡บ๐Ÿ‡ธ Portland 422 1996
17
Kittelson & Associates, Inc.kittelson.com

Solve complex transportation problems through planning, operations, design, and research to improve communities and everyday lives nationwide.

Civil Engineering ๐Ÿ‡บ๐Ÿ‡ธ Portland 420 1985
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

Law Practice ๐Ÿ‡บ๐Ÿ‡ธ Portland 376 1873
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

Professional Services ๐Ÿ‡บ๐Ÿ‡ธ Portland 368 1960
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

IT Services and IT Consulting ๐Ÿ‡บ๐Ÿ‡ธ Portland 348 2016
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

Law Practice ๐Ÿ‡บ๐Ÿ‡ธ Portland 324 1891
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

Accounting ๐Ÿ‡บ๐Ÿ‡ธ Portland 321 1995
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

Professional Services ๐Ÿ‡บ๐Ÿ‡ธ Portland 313 1993
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

Financial Services ๐Ÿ‡บ๐Ÿ‡ธ Portland 234 2006
25
Ankrom Moisanankrommoisan.com

Ankrom Moisan collaborates in architecture, interior design, urban planning, and brand identity to create impactful spaces across the West Coast

Design Services ๐Ÿ‡บ๐Ÿ‡ธ Portland 219 1983
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

Law Practice ๐Ÿ‡บ๐Ÿ‡ธ Portland 186 1965
27
Accordance Search Groupaccordancesearchgroup.com

Connecting sales talent with companies. Specializing in recruiting and placing sales professionals, ensuring successful matches for hiring managers' needs.

Staffing and Recruiting ๐Ÿ‡บ๐Ÿ‡ธ Portland 58 2012
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.

Surveying and Mapping Services ๐Ÿ‡บ๐Ÿ‡ธ Portland 51 2016
29
Alta Planning + Designaltago.com

Consulting firm specializing in bicycle, pedestrian, trail, park, greenway, and roadway planning, design, engineering, and outreach programs.

Professional Services ๐Ÿ‡บ๐Ÿ‡ธ Portland 51 1996
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

Architecture and Planning ๐Ÿ‡บ๐Ÿ‡ธ Portland 27 2009

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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.

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