This selection of professional services firms in Oregon includes large companies, primarily based in Portland. These firms offer a range of specialized services, from IT consulting and engineering to legal and architectural design. Notable examples include ieSolutions, which provides IT staffing and consulting, and David Evans and Associates, Inc., a civil engineering firm. Stoel Rives LLP is a prominent law firm, while ZGF Architects focuses on sustainable architectural design.
The data shows a strong concentration of headquarters in Portland, indicating the city's role as a regional hub for professional services. The companies listed also span a wide founding era, from Stoel Rives LLP established in 1907 to more recent firms like INDUSTRY, founded in 2011, highlighting a mix of long-standing institutions and younger ventures.
| # | 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 |
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 | |||
| 4 |
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 | |||
| 5 |
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 | |||
| 6 |
Logical Positionlogicalposition.com
A top digital marketing agency offering PPC, SEO, website development, graphic design, social media marketing, data feed management, and more to grow businesses globally |
840 | |||
| 7 |
Prialtoprialto.com
Prialto offers subscription staffing for remote executive assistants, managing tasks like scheduling, email, travel, and CRM contact to amplify productivity |
813 | |||
| 8 |
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 | |||
| 9 |
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 | |||
| 10 |
Confident Staffing Incconfidentstaffing.com
A staffing agency providing services in Oregon and Washington, specializing in various industries and positions including manufacturing, aviation, construction, and more Equal opportunity employer |
739 | |||
| 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 | |||
| 16 |
Kittelson & Associates, Inc.kittelson.com
Solve complex transportation problems through planning, operations, design, and research to improve communities and everyday lives nationwide. |
420 | |||
| 17 |
AKS Engineering & Forestryaks-eng.com
Consulting engineering firm offering civil engineering and complementary services in Oregon and SW Washington Specializing in public infrastructure and private development projects |
384 | |||
| 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 |
Quiktrak, LLCquiktrak.com
A global leader in inspection and verification services for the finance industry, offering floorplan auditing solutions and general inspection services worldwide |
323 | |||
| 22 |
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 | |||
| 23 |
Oil and Gas Staffing, LLCogstaffing.net
Petroleum Geologist and Engineer-owned recruiting agency specializing in oil and gas staffing for companies in the US and Canada Staffing professionals and entry-level laborers |
307 | |||
| 24 |
Centizen, Inc.centizen.com
A leading IT staffing and custom software development company offering innovative solutions, remote global hiring, and SaaS product development services |
251 | |||
| 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 | |||
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. | |||||
| 26 |
Madden Industrial Craftsmen, Inc.mici.com
A leading industrial staffing company in the Northwest, prioritizing lifelong customer relationships and rewarding employee skills and contributions |
190 | |||
| 27 |
Evergreen Engineering庐 Inc.evergreenengineering.com
A company founded in 1985 offering industrial engineering, design, consulting, and construction solutions for various markets globally |
73 | |||
| 28 |
Accordance Search Groupaccordancesearchgroup.com
Connecting sales talent with companies. Specializing in recruiting and placing sales professionals, ensuring successful matches for hiring managers' needs. |
58 | |||
| 29 |
Alta Planning + Designaltago.com
Consulting firm specializing in bicycle, pedestrian, trail, park, greenway, and roadway planning, design, engineering, and outreach programs. |
51 | |||
| 30 |
DPW Certified Public Accountantsdpwcpas.com
A financial services firm providing tax preparation, planning, accounting, financial statements, 401K administration, consulting, CAAS, and NIL consulting for businesses and individuals |
50 | |||
| 31 |
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 | |||
| 32 |
Stillwater Energystillwaterenergy.com
A company founded to drive energy savings and a positive impact, focusing on sustainability, collaboration, and fearless innovation in all endeavors |
26 | |||
| 33 |
MADOlookwithmado.com
A women-owned company in Portland delivering innovative research insights, strategic advisory, and foresight methods to inspire transformational innovation for clients |
25 | |||
| 34 |
The Good | Digital Experience Optimizationthegood.com
Utilizing user insights, this company helps clients optimize digital platforms through data-driven testing, resulting in significant improvements |
24 | |||
| 35 |
OmniDatafreschesolutions.com
Specializing in solution architecture, data engineering, and business intelligence, we partner with global companies to create quick solutions for complex data problems |
23 | |||
| 36 |
Golsan Scruggsgolsanscruggs.com
A specialized risk management consultant and corporate insurance brokerage firm offering Enterprise Risk Management services to commercial clients nationwide |
23 | |||
| 37 |
Sapient Lawsapientlaw.com
A unique full-service law firm providing tailored legal solutions for businesses, with experienced attorneys who prioritize client needs and communication |
18 | |||
| 38 |
Mjh Investmentsmjhgroup.com
A private investment and management consulting firm offering services in direct investment and consulting, specializing in private investments |
13 | |||
| 39 |
Solarc Energy Groupsolarcenergygroup.com
A small firm offering energy efficiency analysis, commissioning, and mechanical engineering services with extensive experience in building energy conservation projects |
12 | |||
| 40 |
S&C Consulting
Global consulting firm providing AI-powered consultation for DevOps and IT teams, founded in 2016 by two partners |
11 | |||
| 41 |
Future State Consultinglaunchconsulting.com
Tech consulting firm delivering top engineering talent and team solutions with a personalized, relationship-first approach for digital mobility and technology goals |
11 | |||
| 42 |
Range Financial Grouprangefinancialgroup.com
A full-service financial firm specializing in financial planning, investment management, tax strategies, and tax return preparation for executives, business owners, and families |
10 | |||
| 43 |
Bridge City Legalbridgecitylegal.com
A premier west coast litigation consulting and document management company offering strategic, high-quality, and cost-effective solutions to corporations and law firms Services include data forensics, electronic discovery, trial presentation, and more |
9 | |||
| 44 |
Compass IP Law PCcompassiplaw.com
An intellectual property firm specializing in patent law, providing tailored quality work to help clients protect inventions domestically and internationally |
9 | |||
| 45 |
Pepper Foster Consultingpepperfoster.com
A strategy and execution consulting firm helping clients in various industries figure things out and achieve impactful results through innovative solutions and great people |
9 | |||
| 46 |
Rogue Consultingrogueventuresinc.com
Business services firm specializing in transforming passions into plans, providing customized solutions and full implementation support to empower organizations for impact and change |
8 | |||
| 47 |
TACCtacc-or.com
A Central Oregon-based company offering creative technical solutions for businesses in the analytical instrument industry, focused on computing and marketing needs |
7 | |||
| 48 |
M28 Global, Inc.m28global.com
Specializing in addressing operational challenges through technology, data analytics, and process optimization with experts in business, technology, digital strategy, and design |
7 | |||
| 49 |
Endeavor45, LLCendeavor45.com
A consulting group in Portland, OR specializing in Medical Device commercialization, product development, business growth, marketing, branding, and creative services |
6 | |||
| 50 |
Anchor Blue Consulting, LLCanchorbluellc.com
Small energy consulting firm with expertise in energy efficiency, renewable energy, demand response, and evaluation services for utilities, government agencies, and non-profit clients |
5 | |||
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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 11, 2026.
More company lists in Oregon
- The largest companies in Oregon 1,086
- Retail chains in Oregon 114
- Manufacturers in Oregon 112
- Multinational companies in Oregon 97
- Education providers in Oregon 75
- Hardware manufacturers in Oregon 74
- Food and Beverage Services companies in Oregon 74
- Healthcare providers in Oregon 72
- Companies with in-house R&D in Oregon 67
- Financial services firms in Oregon 61
- Critical infrastructure operators in Oregon 58
- Construction companies in Oregon 58
- Public sector organisations in Oregon 58
- Family-owned companies in Oregon 54
- Hospitals and Health Care companies in Oregon 48
- Food and beverage companies in Oregon 47
- Distributors and wholesalers in Oregon 42
- Hotel and hospitality groups in Oregon 41
- Consulting firms in Oregon 40
- E-commerce companies in Oregon 40
- Government Administration companies in Oregon 40
- Higher Education companies in Oregon 39
- IT Services and IT Consulting companies in Oregon 38
- Contract manufacturers in Oregon 34
The same list elsewhere in United States
- Professional services firms in the United States 7,078
- Professional services firms in New York State 955
- Professional services firms in California 880
- Professional services firms in Texas 629
- Professional services firms in Florida 375
- Professional services firms in Virginia 344
- Professional services firms in Illinois 339
- Professional services firms in Massachusetts 249
- Professional services firms in New Jersey 249
- Professional services firms in Georgia 246
- Professional services firms in Pennsylvania 245
- Professional services firms in Ohio 195
- Professional services firms in Maryland 176
- Professional services firms in Michigan 172
- Professional services firms in Washington State 163
- Professional services firms in North Carolina 142
- Professional services firms in Alabama 135
- Professional services firms in Minnesota 125
- Professional services firms in New York 735
- Professional services firms in Chicago 196
- Professional services firms in Houston 156
- Professional services firms in Atlanta 143
- Professional services firms in San Francisco 130
- Professional services firms in Washington 109