| # | Company | Employees |
|---|---|---|
| 1 |
Booz Allen Hamiltonboozallen.com
Innovative technology consulting firm advancing critical missions through AI, cybersecurity, and engineering solutions, empowering clients to shape the future |
37,244 |
| 2 |
Maximusmaximus.com
The company provides transformative technology services, digital customer experiences, and clinical health services to improve lives and support customer missions |
26,654 |
| 3 |
Guidehouseguidehouse.com
Global AI-led professional services firm providing advisory, technology, and managed services to commercial and government sectors for efficiency and resilience. |
15,865 |
| 4 | 9,164 | |
| 5 |
LCC - A Tech Mahindra Companylcc.com
A pioneer since 1983, providing network services globally for telecom operators with a focus on innovation, consultancy, and managed services |
2,770 |
| 6 | 2,001 | |
| 7 |
CrossCountry Consultingcrosscountry-consulting.com
Advisory and technology solutions for finance, accounting, risk, and operations, leveraging data and AI to address complex challenges and maximize transaction value. |
1,652 |
| 8 |
Credencecredence.ai
A leading government contractor providing technology, health, development, engineering, and management solutions with a focus on exceeding customer expectations and employee wellbeing |
1,345 |
| 9 |
DISYSdexian.com
Global technology and consulting specializing in managed services, staffing, and business consulting Experts in IT solutions and diverse staffing partnerships |
1,093 |
| 10 |
Bureau Veritas Mission Criticalbvmissioncritical.com
A leading provider of mission critical commissioning and operational risk management services for data centers, ensuring quality, performance, and client satisfaction |
757 |
| 11 |
Ntiva, Inc.ntiva.com
A growing managed services company specializing in IT solutions, strategic direction, infrastructure management, and advanced security solutions for businesses nationwide |
608 |
| 12 |
ARES Corporationarescorporation.com
A leading engineering and project management company specializing in reliability, IT security, and software solutions for nuclear, clean technology, space, and defense industries |
596 |
| 13 |
Xcelerate Solutionsxceleratesolutions.com
The company specializes in managing risk, creating innovative solutions, and accelerating time to value in the areas of enterprise security, consulting, and digital transformation |
508 |
| 14 |
Attain Partnersattainpartners.com
A strategy, technology, and compliance consulting firm based in McLean, Va, delivering services to advance missions in education, healthcare, government, and nonprofits |
441 |
| 15 |
OST, Inc.ostglobal.com
Solves complex problems and challenges to deliver optimized, value-driven solutions improving business operations and advancing customer missions. |
366 |
| 16 |
OBXtekobxtek.com
A relationship-driven IT and professional services company offering innovative solutions to government partners with expertise in cybersecurity, IT management, engineering, and more |
339 |
| 17 |
ARG - IT Claritymyarg.com
A technology consultancy firm helping companies save on IT spending, choose the right services, and protect their business for over 32 years |
317 |
| 18 |
Novettaaccenture.com
Innovative company providing advanced analytic and technical solutions for national security, with a focus on disruptive technologies and mission success Offering inclusive workplace culture |
309 |
| 19 |
Highspring (Formerly MorganFranklin Consulting)highspring.com
Global professional services organization providing integrated consulting, managed services, and talent solutions specializing in finance, risk, digital transformation, and information technology expertise. |
286 |
| 20 |
Acumen Solutionsacumensolutions.com
A trusted partner for Fortune 500 companies and government agencies, delivering successful solutions through a team of experts and groundbreaking technology |
233 |
| 21 |
Procon Consultingproconconsulting.com
A small business providing program & project management for construction and real estate projects, space planning, real estate portfolio services, and business consulting |
219 |
| 22 |
ValidaTek, Inc.validatek.com
A premier government IT consulting firm in DC area, specializing in technology transformation and securing mission-critical systems for federal partners with a focus on people |
206 |
| 23 |
GCB Servicesgcbservices.com
A premier provider of engineering and IT services to the wireless telecom industry, offering solutions from planning to project management and IT consulting |
186 |
| 24 |
Main Digitalmaindigital.com
Consulting firm specializing in digital transformation services, utilizing Intelligent Automation and Total Experience best practices to deliver scalable solutions for clients |
66 |
| 25 |
Y Point Solutions LLCfederal.ypointanalytics.com
A professional services organization specializing in data analytics, delivering customized solutions for effective decision making through data strategy, integration, and architecture services |
35 |
| 26 |
Interspeed Digital Solutionsinterspeeddigital.com
The company provides consulting services to help organizations overcome obstacles and succeed in their digital transformation journey by thinking long-term and acting promptly |
34 |
| 27 |
Data Management Groupdatamanagementgroup.com
The company specializes in digital transformation solutions focusing on data, cybersecurity, and cloud, helping organizations improve through planning and analytics |
24 |
| 28 |
Syed and Associatessyedandassociates.com
A global consulting firm working with leaders in public, private, and social sectors to transform decisions into actionable strategies for organizational success |
22 |
| 29 |
AXIS Management Groupaxisus.com
Consulting services company providing integrated IT, scientific, and strategic solutions for Federal Government, municipalities, and non-profits to improve operations and citizen engagement |
12 |
| 30 |
WadiTekwaditek.com
Waditek specializes in digital transformation consulting, staffing, and recruiting services, offering creative solutions through Salesforce, AI, and optimized business systems |
11 |
| 31 |
Occam Solutions, Incoccamsolutions.com
A leading provider of consulting, system integration, and mission support services for clients in public and private sectors, focusing on simple and effective solutions |
11 |
| 32 |
Oldham Globaloldhamglobal.com
A development company with interests in real estate investments, private equity funds, and operating companies in technology, health, pharmacy, logistics, fintech, and clinical staffing |
8 |
| 33 |
Datalitedatalite.ai
This firm provides data strategy consultancy, develops data-intensive applications, migrates data to NoSQL databases, integrates diverse data sets, and offers innovative data solutions |
5 |
| 34 |
COMPUONcompuon.com
Provider of comprehensive IT services and solutions, including expert consultants, project managers, programmers, engineers, software, and hardware to drive business success |
3 |
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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 2, 2026.
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