| # | Company | Employees |
|---|---|---|
| 1 |
FTI Consultingfticonsulting.com
Global expert firm providing crisis management, transformation consulting, and strategic solutions to organizations facing complex business challenges worldwide. |
10,452 |
| 2 |
Chemonics Internationalchemonics.com
An international development company with 4,000 specialists globally, focusing on various sectors like agriculture, governance, health, and supply chain solutions |
3,985 |
| 3 |
Consilio LLCconsilio.com
Offers eDiscovery, document review, flexible legal talent, legal advisory, and transformation consulting services to law firms and corporations globally. |
3,639 |
| 4 |
Palladium: Make It Possiblethepalladiumgroup.com
Collaborates with governments, businesses, and communities to design and implement large-scale programs tackling climate, conflict, and inequality worldwide. |
2,845 |
| 5 |
BRGthinkbrg.com
Provides interdisciplinary consulting combining academic knowledge and business expertise in economics, disputes, corporate finance, and performance improvement globally. |
2,395 |
| 6 |
Gallupgallup.com
Provides analytics and advice to help leaders solve problems using over 85 years of experience and global insights on attitudes and behaviors |
2,320 |
| 7 | 2,131 | |
| 8 |
APCOapcoworldwide.com
Global advisory and advocacy firm assisting organizations in building common ground to facilitate progress and achieve strategic goals effectively. |
1,817 |
| 9 |
Versar Global Solutionsversar.com
A Washington, DC-based company provides full lifecycle solutions for government and commercial Customers in natural, built, and digital environments worldwide |
1,603 |
| 10 |
Pagepagethink.com
Multidisciplinary design, architecture, and engineering firm with 1,300+ staff and international offices Specializing in complex projects across various sectors Visit wwwpagethinkcom for more information |
1,448 |
| 11 |
InfoCeptsinfocepts.ai
Infocepts specializes in using data, AI, and user-friendly analytics to help clients overcome challenges and make better business decisions |
1,428 |
| 12 |
ENGIE Impactengieimpact.com
Sustainability solutions provider for corporations, cities, and governments worldwide, offering strategic and technical support to tackle complex sustainability challenges Leader in zero-carbon transition |
934 |
| 13 |
LBSversar.com
Versar Global Solutions provides comprehensive lifecycle solutions for government and commercial clients in natural, built, and digital environments worldwide |
802 |
| 14 |
Compass Lexeconcompasslexecon.com
Provides economic consulting services to law firms, corporations, and governments, offering analysis for litigation, regulation, and strategic decisions. |
779 |
| 15 |
Navanavapbc.com
Nava is a consultancy and public benefit corporation dedicated to simplifying and improving government services through civic technology and inclusive design |
729 |
| 16 |
Penta Grouppentagroup.com
A global stakeholder solutions firm using AI and research to address stakeholder challenges in business, policy, and communications Offices worldwide |
489 |
| 17 |
Gryphon Technologies, Incgryphontechnologies.com
A transformational leader in digital engineering and technical solutions for national security, specializing in research, development, defense systems, cybersecurity, and logistics |
457 |
| 18 |
Bates White Economic Consultingbateswhite.com
Privately-held economic consulting firm specializing in advanced analysis for law firms, Fortune 500 companies, and government agencies, with a focus on rigorous empirical analysis and communication |
426 |
| 19 | 422 | |
| 20 |
CGS Federal (Contact Government Services)cgsfederal.com
This company provides customized solutions to simplify government bureaucracy by optimizing resources and delivering technical expertise with empathy for public service success |
403 |
| 21 |
IBM Promontoryibm.com
Global leader in strategy, risk management, and compliance consulting, operating as a business unit under IBM Consulting |
401 |
| 22 |
CVP (Customer Value Partners)cvpcorp.com
Healthcare and technology firm specializing in transformative solutions to create healthier, safer, and brighter futures for organizations. |
391 |
| 23 |
Webandcraftswebandcrafts.com
A global IT solution provider offering custom mobility solutions, web & mobile applications, digital marketing strategies, and e-commerce development services |
380 |
| 24 |
Kaiser Associateskaiserassociates.com
A strategic consulting firm that helps executives make informed decisions through external analysis, generating insights to drive growth and productivity |
378 |
| 25 |
DGA Groupdgagroup.com
Advisory firm specializing in global strategy, commercial diplomacy, communications, public affairs, government relations, and business intelligence consulting services. |
377 |
| 26 |
Advisory Boardadvisory.com
Providing healthcare industry leaders with insights, strategies, and tools to work smarter and drive change through research and collaboration |
361 |
| 27 |
RTKLcallisonrtkl.com
A global leader in sustainable design and engineering solutions for natural and built assets, addressing complex urban challenges and shaping future cities |
355 |
| 28 |
Verified Market Research庐verifiedmarketresearch.com
Global analytical research consultancy empowering Fortune 500 corporations with actionable intelligence and strategic insights for market leadership and revenue impact |
341 |
| 29 |
Capstonecapstonedc.com
Global strategy firm advising corporations, industries, and investors on navigating policy and regulatory landscapes in financial services, healthcare, TMT, and energy sectors |
337 |
| 30 |
National Academy of Public Administrationnapawash.org
A non-profit organization of public management leaders dedicated to addressing the nation's most critical challenges since 1967 |
327 |
| 31 |
Nonprofit HR, Powered by OneDigitalnonprofithr.com
Leading HR firm specializing in the nonprofit sector, offering talent acquisition, executive search, consulting, and training to help organizations optimize their workforce and impact |
325 |
| 32 |
DCIdcigroup.com
An independent public affairs consulting firm specializing in public relations, crisis management, grassroots engagement, and digital advocacy for corporations and organizations worldwide |
285 |
| 33 |
Fintrac Incfintrac.com
A US-based consulting company develops agricultural solutions to end hunger and poverty by increasing production, improving postharvest handling, and developing markets |
267 |
| 34 |
CSSIcssiinc.com
Providing safety critical systems support and modernization for transportation and defense sectors, enhancing efficiency and infrastructure safety nationwide. |
255 |
| 35 |
TDItdinternational.com
Strategic advisory and risk intelligence firm offering actionable intelligence to manage risk for multinational organizations, financial services, law firms, and individuals |
243 |
| 36 |
TFG (The Ferguson Group)thefergusongroup.com
A bipartisan government relations firm specializing in securing federal funding and policy changes for public, private, and non-profit sectors |
233 |
| 37 |
PSApsagroup.com
Specialist risk consulting firm providing due diligence, investigation, and advisory services with experienced professionals from corporate, government, and law enforcement backgrounds |
199 |
| 38 |
Aristotlearistotle.com
Political technology pioneer providing campaign software, voter data, PAC services, and customer support for political organizations and individuals involved in the political process |
186 |
| 39 |
McKissack & McKissackmckinc.com
A national firm specializing in architectural, engineering, program, and construction management, delivering projects that enhance lives and empower communities to thrive |
185 |
| 40 |
Invariantweareinvariant.com
Bipartisan government relations and communications firm offering strategic advice on navigating Washington to achieve advocacy, legislative analysis, coalition building, and crisis management |
181 |
| 41 |
Britebritesys.com
Accelerates missions implementing Salesforce solutions for state governments, federal agencies, nonprofits, and commercial enterprises. Focus on health, human services, and public sector modernization. |
149 |
| 42 |
Trust Consulting Services Inc.trustconsultingservices.com
Providing tailored consulting services across acquisition, program, financial, facilities, IT management with security and client satisfaction focus. |
72 |
| 43 |
NDA Partners, a ProPharma Companyndapartners.com
A life sciences consulting organization offering product development and regulatory services to pharmaceutical, biotechnology, and medical device industries worldwide |
58 |
| 44 |
DigiDoc, Inc. dba Public Sector Solutions Groupps2g.us
An award-winning IT consulting firm specializing in real-time information access and user experience, focusing on energy/utilities, healthcare, and public sector digital transformations |
50 |
| 45 |
Breakwater Strategybreakwaterstrategy.com
A boutique strategic communications firm specializing in helping organizations navigate complex issues during times of crisis and uncertainty |
46 |
| 46 |
Educology Solutionsesinc-dc.com
Specializing in public sector digital transformation, Educology Solutions creates modernized technologies for a digital-first constituent experience |
40 |
| 47 |
KANDER庐kanderconsult.com
A women-founded Salesforce consulting firm providing program management, implementation, and integration services to help organizations maximize the value of their Salesforce deployment |
33 |
| 48 |
38North Security38northsecurity.com
Specializing in cloud security and compliance, we help organizations globally design secure solutions, manage risks, and navigate complex security challenges |
33 |
| 49 |
Blue Crab Strategiesbluecrabstrategies.com
A mission-driven strategic consulting firm tackling global climate challenges by collaborating with impactful players in the clean energy transition and climate action |
28 |
| 50 |
Professional Management Consulting Servicespmcsllc.com
Professional Management Consulting Services offers comprehensive management, IT, organizational transformation, and development solutions to public and private sector clients in various industries |
28 |
| 51 |
DCDB Groupdcdbgroup.com
A global consultancy firm specializing in international business transactions, serving clients worldwide with expertise in finance, investment banking, and strategic consulting |
26 |
| 52 |
532 Group LLC532group.com
An innovative consulting firm offering services in innovation, operations, and technology to government, health, and financial sector clients with a focus on client-focused and measurable results |
23 |
| 53 |
Starks Industriesstarks-industries.com
Global business and IT solutions company leveraging technology and innovation to empower partnerships for mission success, with a focus on diversity and excellence |
20 |
| 54 |
Aperture Solutions Groupaperturesg.com
Management consulting and technology solutions firm specializing in empowering customers to improve government and create a safer, healthier future |
19 |
| 55 |
OXUS Consulting Groupoxuscorp.com
Specializing in Information Technology, Management Consulting, International Development, and Workforce Solutions, we deliver transformative solutions globally to diverse clientele |
18 |
| 56 |
BizTech Fusion LLCbiztechfusion.com
Global IT and business consulting firm providing tailored solutions aligning technology with strategic business goals, specializing in IT infrastructure, cloud adoption, unified communications, and business productivity solutions |
18 |
| 57 |
Blitzer, Clancy & Companybcxintl.com
A global leader in investment banking, growth consulting, and investment advisory services, building long-lasting relationships and surpassing expectations for clients |
14 |
| 58 |
Ideogenics, LLCideogenics.com
A government consulting firm specializing in cutting-edge solutions, database development, strategic communications, and security support with top-tier professional employees |
5 |
| 59 |
AlphaAdvisorsalphaadvisors.com
An emerging tech consultancy specializing in data strategy, technology consulting, and Web3 enablement to transform businesses for success in the digital age |
5 |
| 60 |
Deborah Brosnan & Associatesdeborahbrosnan.com
Innovative company offering science-based environmental solutions worldwide, specializing in risk management, strategic advising, EIAS, and climate-resilient development with nature-based solutions |
4 |
| 61 |
Tusk LLCtuskservices.co
A WOSB and 8a certified firm providing top-notch consulting services for digital transformation needs |
4 |
| 62 |
Blackbird Consulting Group
A premier digital transformation and AI consulting firm, empowering organizations through strategic guidance and cutting-edge technology solutions for digital maturity and efficiency |
4 |
| 63 |
em路data, inc.emdata.ai
em路data is a data design and analytics firm that assists in developing data capabilities and solutions for your business needs |
3 |
| 64 |
LMI Advisors, LLClmiadvisors.com
A consulting firm specializing in international communications industry, providing regulatory guidance, licensing support, and business implementation advice for global market success |
3 |
| 65 |
D-Tech Solutions LLCtheteksolutions.com
A leading business corporation offering innovative solutions for complex issues, specializing in modernizing businesses for corporate and public sector clients |
3 |
| 66 |
Netspot Consultingnetspotconsulting.com
Netspot accelerates digital transformation through technical expertise, staffing solutions, and guiding clients towards sustainable growth with cloud migration expertise |
3 |
| 67 |
The Barkley Groupthebarkleygroup.com
Experienced team of former C-suite executives specializing in digital transformation, financial turnaround, innovation, and operational excellence to drive success in today's economy |
2 |
| 68 |
Execurateexecurate.com
The company focuses on enhancing personal and corporate performance through training and providing innovative solutions for organizational excellence worldwide |
2 |
| 69 |
Align Resource Managementalignresource.com
Global management consulting firm helping organizations in private, public, and social sectors navigate change, improve performance, and drive bottom-line impact through strategic solutions |
2 |
| 70 |
Cadre Scoutcadrescout.com
Full-service Salesforce consulting firm specializing in maximizing Salesforce ecosystem value, offering services for digital transformation and business outcomes with innovative technology solutions |
1 |
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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 2, 2026.
More company lists in Washington
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- Public sector organisations in Washington 65
- IT Services and IT Consulting companies in Washington 56
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- Critical infrastructure operators in Washington 42
- Financial Services companies in Washington 41
- Law firms in Washington 41
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- Research institutes in Washington 38
- Venture capital and private equity firms in Washington 37
- Healthcare providers in Washington 36
- Higher Education companies in Washington 36
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- International Affairs companies in Washington 29
- Aerospace and defence companies in Washington 28
The same list elsewhere in United States
- Consulting firms in the United States 4,382
- Consulting firms in California 553
- Consulting firms in New York State 474
- Consulting firms in Texas 453
- Consulting firms in Virginia 283
- Consulting firms in Illinois 238
- Consulting firms in New Jersey 215
- Consulting firms in Florida 186
- Consulting firms in Georgia 168
- Consulting firms in Massachusetts 153
- Consulting firms in Pennsylvania 144
- Consulting firms in Ohio 115
- Consulting firms in Maryland 112
- Consulting firms in Washington State 106
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- Consulting firms in North Carolina 85
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