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Professional services firms headquartered in Colorado

Tamtam tracks 106 professional services firms headquartered in Colorado. This list ranks the 50 largest by number of employees on LinkedIn, led by CH2M, Atlas and Tek Experts. Their median headcount is 520. Half of them were founded in 1994 or later. The most common headquarters are Denver (23), Colorado Springs (5) and Lakewood (4).

馃嚭馃嚫 Colorado50 companiesUpdated Nov 11, 2026

This selection of professional services firms in Colorado consists predominantly of mid-sized to large companies, with a strong presence in civil engineering, IT services, and legal practice. Notable firms include CH2M, a global infrastructure and natural resource problem solver, and Atlas, which provides professional testing, inspection, and engineering services. Tek Experts offers digital transformation solutions, while Optiv focuses on cybersecurity programs. Holland & Hart LLP is a law firm in the Mountain West region, and Merrick & Company provides engineering, architecture, and geospatial solutions.

A significant pattern observed is the concentration of headquarters in Denver, which hosts multiple legal firms such as Holland & Hart LLP, Bryan Cave LLP, and Brownstein Hyatt Farber Schreck, as well as architecture firms like Independent Architecture and VA+. This suggests a central hub for professional services within the state.

#CompanyIndustryHeadquarters EmployeesFounded
1
CH2Mjacobs.com

global infrastructure and natural resource problems solver, creating new pathways for human progress. Engineering for governments, cities, and businesses.

Civil Engineering 馃嚭馃嚫 Englewood 7,008 1946
2
Atlasoneatlas.com

A nationwide provider of professional testing, inspection, engineering, environmental, and consulting services for public and private sector clients in various markets

Civil Engineering 馃嚭馃嚫 Denver 4,185 n/a
3
Tek Expertsteknowledge.com

Global digital transformation company providing enterprise technical managed services, technical skilling, and cybersecurity solutions with a focus on exceptional customer experiences

IT Services and IT Consulting 馃嚭馃嚫 Colorado Springs 2,617 2010
4
Optivoptiv.com

Provides cyber advisory, deploys and operates cybersecurity programs including strategy, managed security services, risk, integration and technology solutions for nearly 6,000 companies.

Computer and Network Security 馃嚭馃嚫 Denver 2,224 2015
5
MWH, now part of Stantec

This company is no longer active on LinkedIn Visit their new page to learn more about their services

Civil Engineering 馃嚭馃嚫 Broomfield 2,022 1820
6
Holland & Hart LLPhollandhart.com

A law firm in the Mountain West region offering legal services with a focus on diversity, equity, and inclusion, and fostering alumni relationships

Law Practice 馃嚭馃嚫 Denver 1,245 1947
7
Merrick & Companymerrick.com

Employee-owned professional firm providing engineering, architecture, surveying, and geospatial solutions to clients in energy, national security, life sciences, and infrastructure markets Offering corporate responsibility programs

Design Services 馃嚭馃嚫 Greenwood Village 1,162 1955
8
Bryan Cave LLPbclplaw.com

International legal practice providing a wide range of legal services to diverse clients, including multinational corporations, privately held companies, and emerging businesses

Law Practice 馃嚭馃嚫 Denver 943 n/a
9
Independent Architectureindependentarchitecture.com

Denver-based architecture office blending design with pop culture Specializing in unique projects like small building for Chicago Architecture Biennial and steel barn kit house

Architecture and Planning 馃嚭馃嚫 Denver 936 2009
10
Datavaildatavail.com

It offers technology consulting, implementation, and managed services, focusing on database management, analytics, application development, and cloud infrastructure solutions.

IT Services and IT Consulting 馃嚭馃嚫 Boulder 898 2007
11
Colorado State Public Defendercoloradodefenders.us

Providing zealous and effective legal representation for indigent individuals facing criminal charges in Colorado, upholding their right to counsel

Legal Services 馃嚭馃嚫 Denver 896 1970
12
Brownstein Hyatt Farber Schreckbhfs.com

A multidisciplinary team of lawyers, policy experts, and business professionals solving tough challenges at the intersection of law, business, and policy

Law Practice 馃嚭馃嚫 Denver 895 1968
13
VA+vertical-arts.com

A Denver-based team of BIM professionals collaborates with architects and engineers globally to enhance BIM workflows and outcomes for successful design projects

Architecture and Planning 馃嚭馃嚫 Denver 847 2005
14
Gov-Con Solutionsgov-con.com

Specializing in financial and accounting solutions for government contractors, we assist with systems, rates, proposals, budgets, projections, and audits nationwide

Government Administration 馃嚭馃嚫 Broomfield 843 2004
15
Eberl Claims Serviceeberls.com

A people-centric organization leveraging technology and compassion to provide comprehensive insurance claims management solutions, from loss adjusting to repair management

Insurance 馃嚭馃嚫 Lakewood 781 1987
16
PDSpdsinc.com

Leading IT and engineering consulting firm in the Western US, delivering award-winning solutions and resources across technology, engineering, financial, and human capital management divisions

IT Services and IT Consulting 馃嚭馃嚫 Centennial 766 1987
17
ME Engineersme-engineers.com

Specializing in innovative MEPT systems, this company designs sports venues, commercial developments, educational buildings, and healthcare facilities with a focus on sustainability and efficiency

Design Services 馃嚭馃嚫 Golden 746 1981
18
Pinionpinionglobal.com

A global leader in food and agriculture consulting and business advisory, providing specialized services in sustainability, government affairs, financial management, and more

Accounting 馃嚭馃嚫 Loveland 711 1932
19
HVShvs.com

A leading consulting firm specializing in the hospitality sector, offering expertise in ownership phases, from feasibility studies to exit strategies worldwide

Hospitality 馃嚭馃嚫 Loveland 655 1980
20
Integra Realty Resourcesirr.com

A leading provider of commercial real estate valuation, counseling, and advisory services nationwide, bringing expertise and local market insight to clients

Real Estate 馃嚭馃嚫 Denver 635 1999
21
Clinic Service Corporationclinicservice.com

Medical billing specialist offering practice management solutions including EMR system implementation, business plan development, and managed care contracting for private medical practices

Hospitals and Health Care 馃嚭馃嚫 Denver 567 1974
22
SAFEbuiltsafebuilt.com

Providing expertise in community development services with a focus on integrity, improvement, service, teamwork, and respect, driving safe and thriving communities

Government Administration 馃嚭馃嚫 Loveland 566 1992
23
Prosciprosci.com

Helps organizations manage change through a proven methodology, research, and results-focused training and consulting, ensuring successful transitions for clients globally.

Business Consulting and Services 馃嚭馃嚫 Fort Collins 557 1994
24
SPARTAdomaineasy.com

A provider of technical products and services to US government sectors, specializing in critical analysis, computer science solutions, network architecture, and acquisition support

Defense and Space Manufacturing 馃嚭馃嚫 Colorado Springs 543 n/a
25
Design Workshopdesignworkshop.com

A global design studio specializing in landscape architecture, urban design, planning, and environmental graphic design, committed to sustainability and community connections

Architecture and Planning 馃嚭馃嚫 Denver 520 1969

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26
WDHBwdhb.com

WDHB offers innovative experiential learning programs and advisory services for leaders worldwide, focusing on strategic discovery, leadership development, and L&D

Business Consulting and Services 馃嚭馃嚫 Denver 509 n/a
27
Gorilla Logicgorillalogic.com

A leading tech partner delivering innovative digital products and platforms, with deep expertise, collaborative Agile teams, and a focus on client success

Software Development 馃嚭馃嚫 Broomfield 505 2002
28
Apogeeapogeeusa.com

A small business known for client success, a family-like work environment, and providing innovative solutions with dedication to professional support

Business Consulting and Services 馃嚭馃嚫 Colorado Springs 504 2004
29
Project Resources Group, Inc.prgus.com

Leading provider of construction management and outside plant damage investigation and recovery services for telecommunication and utility industries since 2001

Business Consulting and Services 馃嚭馃嚫 Greenwood Village 494 2001
30
SalesHivesaleshive.com

It specializes in B2B lead generation through cold calling, email, and LinkedIn, utilizing a proprietary outreach platform and CRM.

Advertising Services 馃嚭馃嚫 Denver 438 2016
31
Campos EPCcamposepc.com

A Denver-based EPC company specializing in services for utility, energy, and midstream organizations with a focus on diversity and talent development

Utilities 馃嚭馃嚫 Denver 429 2005
32
Lerch Bates Inc.lerchbates.com

Global technical consultancy specializing in building design, modernization, investigation, and management, offering services for vertical transportation, logistics, enclosures, facades, and building lifecycle optimization

Architecture and Planning 馃嚭馃嚫 Highlands Ranch 426 n/a
33
Briotix Healthbriotix.com

Briotix Health specializes in musculoskeletal injury prevention, office ergonomics, and customized solutions for workforce health, utilizing technology and coaching

Wellness and Fitness Services 馃嚭馃嚫 Centennial 425 1997
34
MCA Connectmcaconnect.com

The company specializes in providing manufacturing industry expertise, strategic solutions, digital transformation, and Microsoft Cloud services to help manufacturers succeed globally

IT Services and IT Consulting 馃嚭馃嚫 Denver 420 2002
35
Aventiaaventiaenv.com

A leading environmental consulting firm providing innovative and sustainable solutions for various environmental challenges through its platform of subsidiary companies

Environmental Services 馃嚭馃嚫 Lakewood 419 n/a
36
Martin/Martin, Incmartinmartin.com

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 馃嚭馃嚫 Lakewood 406 1988
37
Elementselementsofplace.com

This company focuses on placemaking by understanding people's needs to create inspiring environments through design, consulting, furnishings, and construction services

Design Services 馃嚭馃嚫 Denver 403 2008
38
EnergyScape Renewablesenergyscaperenewables.com

A leading provider of comprehensive Solar CAD Designs and Engineering services to US developers and EPC's worldwide, ensuring fast regulatory approval

Operations Consulting 馃嚭馃嚫 Denver 391 2019
39
JR Engineeringjrengineering.com

Established in 1973, this Colorado-based company offers a wide range of engineering services, including land development, surveying, transportation, water resources, and structural engineering, as well as construction services

Civil Engineering 馃嚭馃嚫 Centennial 387 1973
40
Galloway & Company, LLCgallowayus.com

A multidisciplinary firm in architecture, engineering, and survey services, providing full support for development projects with a collaborative, client-focused approach

Architecture and Planning 馃嚭馃嚫 Greenwood Village 378 1982
41
NEI Electric Power Engineering, Inc.neiengineering.com

NEI provides professional power system engineering services, specializing in renewables, substation design, transmission, distribution, and construction management with experienced engineers

Engineering Services 馃嚭馃嚫 Lakewood 355 1982
42
Apex ITapexit.com

A technology consulting firm providing enterprise solutions like Oracle and Salesforce, specializing in CRM, HCM, financial reporting, and Business Intelligence

IT Services and IT Consulting 馃嚭馃嚫 Denver 345 1997
43
Xclusive Servicesxclusivestaffing.com

Custom staffing solutions tailored to clients' needs, recruiting skilled and motivated staff to help achieve business objectives

Staffing and Recruiting 馃嚭馃嚫 Denver 345 2002
44
IntelliSourceintellisource.com

Innovative outsourcing company specializing in solving business challenges through customizable solutions in BPO, RPO, and Total Talent Management

Business Consulting and Services 馃嚭馃嚫 Denver 343 1999
45
The Proof Positive Group: MS Word Expert & PowerPoint Expert | Templates | Formatting | RFP | PC/Macmswordpowerpointexpert.com

Specializing in expert Microsoft Office support services for document needs, including template development, document formatting, PDF merges, and more for PC and Mac users

Business Consulting and Services 馃嚭馃嚫 Denver 343 2001
46
Richey Mayricheymay.com

Specializing in alternative investments and mortgage banking industries, offering Audit, Assurance, Tax services, and advisory solutions to propel clients' growth with industry recognition for excellence

Accounting 馃嚭馃嚫 Englewood 327 1985
47
MRC Recruitingmrcrecruiting.com

A family-run recruitment firm specializing in providing high-potential candidates for resource companies worldwide, with a focus on communication, budget-friendly fees, and proven hiring processes

Staffing and Recruiting 馃嚭馃嚫 Denver 326 1984
48
Sanbornsanborn.com

A leader in geospatial solutions, specializing in aerial imaging, LiDAR mapping, 3D modeling, indoor mapping, and software products for global customers

Professional Services 馃嚭馃嚫 Colorado Springs 316 1866
49
RMG Engineersrmg-engineers.com

RMG Engineers and Architects offers a wide range of engineering and architectural services in Colorado, focusing on client needs and delivering successful outcomes

Engineering Services 馃嚭馃嚫 Colorado Springs 308 1986
50
The Premier Groupthepremiergroupus.com

An executive search and placement firm providing supplemental skilled manpower to general contractors and sub contractors for commercial and industrial construction projects nationwide

Staffing and Recruiting 馃嚭馃嚫 Denver 273 2008

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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.

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