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Top 34 consulting firms in McLean

Tamtam tracks 34 consulting firms headquartered in McLean. This list ranks all of them by number of employees on LinkedIn, led by Booz Allen Hamilton, Maximus and Guidehouse. Their median headcount is 317. Half of them were founded in 2005 or later.

馃嚭馃嚫 McLean34 companiesUpdated Nov 2, 2026
#CompanyIndustryHeadquarters EmployeesFounded
1
Booz Allen Hamiltonboozallen.com

Innovative technology consulting firm advancing critical missions through AI, cybersecurity, and engineering solutions, empowering clients to shape the future

Software Development 馃嚭馃嚫 McLean 37,244 1914
2
Maximusmaximus.com

The company provides transformative technology services, digital customer experiences, and clinical health services to improve lives and support customer missions

Government Administration 馃嚭馃嚫 McLean 26,654 n/a
3
Guidehouseguidehouse.com

Global AI-led professional services firm providing advisory, technology, and managed services to commercial and government sectors for efficiency and resilience.

Business Consulting and Services 馃嚭馃嚫 McLean 15,865 n/a
4
MITREmitre.org

A non-profit corporation, operating federally funded R&D centers, dedicated to solving national challenges in defense, cybersecurity, healthcare, homeland security, and transportation

Research Services 馃嚭馃嚫 McLean 9,164 1958
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

Telecommunications 馃嚭馃嚫 McLean 2,770 1983
6
DMIdminc.com

provides digital services including cybersecurity, cloud, application development, and infrastructure support to public and private sector clients

IT Services and IT Consulting 馃嚭馃嚫 McLean 2,001 2002
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.

Business Consulting and Services 馃嚭馃嚫 McLean 1,652 2011
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

IT Services and IT Consulting 馃嚭馃嚫 McLean 1,345 2005
9
DISYSdexian.com

Global technology and consulting specializing in managed services, staffing, and business consulting Experts in IT solutions and diverse staffing partnerships

IT Services and IT Consulting 馃嚭馃嚫 McLean 1,093 n/a
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

Construction 馃嚭馃嚫 McLean 757 2004
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

IT Services and IT Consulting 馃嚭馃嚫 McLean 608 2004
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

Defense and Space Manufacturing 馃嚭馃嚫 McLean 596 1992
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

IT Services and IT Consulting 馃嚭馃嚫 McLean 508 2009
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

Business Consulting and Services 馃嚭馃嚫 McLean 441 2009
15
OST, Inc.ostglobal.com

Solves complex problems and challenges to deliver optimized, value-driven solutions improving business operations and advancing customer missions.

IT Services and IT Consulting 馃嚭馃嚫 McLean 366 1999
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

IT Services and IT Consulting 馃嚭馃嚫 McLean 339 2009
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

IT Services and IT Consulting 馃嚭馃嚫 McLean 317 1991
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

IT Services and IT Consulting 馃嚭馃嚫 McLean 309 2012
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.

Business Consulting and Services 馃嚭馃嚫 McLean 286 1998
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

IT Services and IT Consulting 馃嚭馃嚫 McLean 233 n/a
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

Business Consulting and Services 馃嚭馃嚫 McLean 219 2000
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

IT Services and IT Consulting 馃嚭馃嚫 McLean 206 2006
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

Telecommunications 馃嚭馃嚫 McLean 186 2004
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

IT Services and IT Consulting 馃嚭馃嚫 McLean 66 2019
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

IT Services and IT Consulting 馃嚭馃嚫 McLean 35 2011
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

Software Development 馃嚭馃嚫 McLean 34 n/a
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

Business Consulting and Services 馃嚭馃嚫 McLean 24 n/a
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

Business Consulting and Services 馃嚭馃嚫 McLean 22 2012
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

IT Services and IT Consulting 馃嚭馃嚫 McLean 12 2008
30
WadiTekwaditek.com

Waditek specializes in digital transformation consulting, staffing, and recruiting services, offering creative solutions through Salesforce, AI, and optimized business systems

IT Services and IT Consulting 馃嚭馃嚫 McLean 11 2016
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

IT Services and IT Consulting 馃嚭馃嚫 McLean 11 n/a
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

Business Consulting and Services 馃嚭馃嚫 McLean 8 2017
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

IT Services and IT Consulting 馃嚭馃嚫 McLean 5 2017
34
COMPUONcompuon.com

Provider of comprehensive IT services and solutions, including expert consultants, project managers, programmers, engineers, software, and hardware to drive business success

IT Services and IT Consulting 馃嚭馃嚫 McLean 3 2002

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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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