| # | Company | Employees |
|---|---|---|
| 1 |
Leidosleidos.com
Global technology leader providing digital mission innovations and efficient technical services for government and commercial customers through a diverse, flexible work environment. |
37,171 |
| 2 | 36,645 | |
| 3 |
CACI International Inccaci.com
providing advanced technology and expert services to address complex national security challenges for government and defense sectors |
22,223 |
| 4 |
Peratonperaton.com
A company at the forefront of solving global challenges with innovative solutions, prioritizing safety and security through fresh perspectives and talent |
18,000 |
| 5 | 10,724 | |
| 6 |
ASRC Federalasrcfederal.com
Providing technology and expertise to federal defense and civilian agencies, supporting missions from space exploration to cybersecurity and infrastructure. |
5,051 |
| 7 | 3,124 | |
| 8 |
Engility Corporationsaic.com
A premier technology integrator based in Reston, Virginia, providing information about SAIC through their linkedin page |
1,414 |
| 9 |
GuidePoint Securityguidepointsecurity.com
Elite team of certified experts providing holistic cybersecurity solutions, guiding organizations to make informed decisions, choose appropriate products, and optimize resources |
1,364 |
| 10 |
Revaturerevature.com
Bridges the IT skills gap, accelerating technology workforces for organizations through talent programs, digital academies, and AI training, delivering productive talent faster. |
1,326 |
| 11 |
Noblisnoblis.org
A nonprofit organization providing scientific, technology, and strategy services to government and industry clients in national security, healthcare, and environmental sustainability |
1,313 |
| 12 |
Tkxelcareers.tkxel.com
Tkxel is a USA-based software development company providing innovative solutions like AI, IoT, and cybersecurity to help businesses achieve their digital transformation goals globally |
1,264 |
| 13 |
Tyto Athene, LLCgotyto.com
Specializing in mission-focused digital transformation, our experts offer expertise in Network Modernization, Hybrid Cloud, Cyber Security, and Enterprise IT for defense and security sectors |
967 |
| 14 |
NCI Information Systems, Inclinkedin.com
The company, now known as Empower AI, specializes in artificial intelligence technology Follow their LinkedIn page for updates |
936 |
| 15 |
Synergysynergybis.com
Federal IT firm specializing in cloud, low/no code SaaS platforms, delivering agile MVP solutions to accelerate agency modernization goals. |
865 |
| 16 |
AIS (Applied Information Sciences)ais.com
IT transformation firm specializing in compliant cloud and data solutions for large enterprises, governments, and defense agencies, driving innovation and modernization |
768 |
| 17 |
L-3 National Security Solutionscaci.com
A company that was acquired by CACI International Inc on February 1, 2016, specializing in national security solutions Visit https://wwwlinkedincom/company/caci-international-inc |
729 |
| 18 |
Systems Engineering Services Corporation (SESC)sesc.com
Provider of technology solutions specializing in program management, application development, systems integration, mobile development, virtualization, and systems security for various industries |
681 |
| 19 |
MetroStarmetrostar.com
Leading provider of secure digital transformation and AI-enabled products and solutions, specializing in delivering cutting-edge IT services to government agencies and defense organizations. |
620 |
| 20 |
Brillient Corporationbrillient.net
An award-winning company specializing in full spectrum digital transformation, helping clients achieve efficiencies and lower costs through government and IT modernization initiatives |
556 |
| 21 |
Empower AIempower.ai
Empower AI specializes in boosting workforce productivity for federal agencies through tailored solutions, enabling faster decision-making and mission advancement |
468 |
| 22 |
1Rivet1rivet.com
An award-winning IT Strategy & Consulting firm offering custom Cloud, Application Modernization, and Advanced Analytics solutions to public and private sector clients globally |
405 |
| 23 |
Modus Createmoduscreate.com
Specializing in digital transformation, our global team helps clients innovate and build competitive advantage through strategic consulting, product development, and platform modernization |
270 |
| 24 |
(CACI Acquired) Applied Insight, LLCcaci.com
Applied Insight empowers agencies and industry with innovative cloud infrastructure, big data, and cyber capabilities, offering unique cross-domain solutions and award-winning products Altitudeโข and SHIFTโข |
156 |
| 25 |
KAT ENTERPRISE LLCkatenterprise.com
A technology company providing high-value IT services with focus on innovation, custom programming, application development, digital transformation, and business process solutions |
57 |
| 26 |
Flywheel Dataflywheeldata.com
Provider of IT solutions, services, and products for cloud, data center, and edge technologies, empowering clients to achieve mission success efficiently |
52 |
| 27 |
workMETHODS Solutions Inc.workmethods.com
Global IT consulting company providing turnkey solutions tailored to specific business needs, offering services like IT strategy, managed services, security, and various IT solutions |
46 |
| 28 |
Data Machinesdatamachines.com
A data analytics company specializing in cloud architectures, solving complex problems in data analytics, DevSecOps, machine intelligence, and data science |
45 |
| 29 |
RMantra Solutionsrmantras.com
IT services company focused on delivering long term value to customers by assisting with Architecture, Implementation, and Management of IT projects to improve ROI and lower TCO |
44 |
| 30 |
Confianceconfiancegroup.com
Global provider of business transformation solutions for commercial and government organizations through consulting, training, technology, and managed services to achieve efficiency and improved service |
44 |
| 31 |
XPAND Corporationxpandcorp.com
A leading IT services provider since 1991, specializing in developing and managing web-based solutions for government, commercial clients, exceeding customer expectations |
41 |
| 32 |
Johnson Technology Systems, Inc. (JTSi)jtsusa.com
An IT and Engineering Services provider specializing in delivering mission-critical professional IT services, with a focus on SAP/ERP solutions for the Public Sector |
34 |
| 33 |
CECsoftcecsoft.com
IT Solutions company providing services and offshore outsourcing solutions to streamline operations and maximize IT investments in various industries including construction, manufacturing, insurance, healthcare, and more |
24 |
| 34 |
MP Data LLC (USA)mpdata-llc.com
Small Business specializing in application development, data, cloud computing, and professional services for government agencies 15 years of experience delivering cost-effective IT solutions |
17 |
| 35 |
Aero Infotech LLCaeroinfotech.com
A pioneering IT solutions provider offering software development, consulting, support, training, and staff augmentation to help clients optimize their business processes |
16 |
| 36 |
Virtual Atlantic, Inc.vainc.com
Innovative software development company focused on pushing technology limits, creating groundbreaking solutions, and building long-lasting client relationships based on shared values |
13 |
| 37 |
Technocloud Consultingtechnocloud.net
A dynamic and innovative company specializing in providing high-quality solutions and services to meet the diverse needs of clients |
11 |
| 38 |
Systems Development and Analysissystemsdev.com
This company focuses on clients' missions, providing independent and innovative technology solutions at the interfaces of IT, business, and operations |
10 |
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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 Oct 24, 2026.
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