| # | Company | Employees |
|---|---|---|
| 1 |
DXC Technologydxc.com
It assists global companies in managing critical systems, modernizing IT, optimizing data, and ensuring security across various cloud environments. |
90,597 |
| 2 |
Apex Systemsapexsystems.com
Specializes in strategy, transformation, managed services including application development, data, cloud, cybersecurity, and AI solutions across global markets. |
13,945 |
| 3 |
Accenture Federal Servicesaccenture.com
The company brings advanced R&D, latest technologies, and human-centered design to the federal government to create lasting value and drive positive change |
9,719 |
| 4 |
ASRC Federalasrcfederal.com
Providing technology and expertise to federal defense and civilian agencies, supporting missions from space exploration to cybersecurity and infrastructure. |
5,051 |
| 5 |
LanceSoft, Inc.lancesoft.com
A certified MBE and woman-owned organization providing global workforce solutions and IT services to diverse clients across various domains with human touch |
4,954 |
| 6 |
Dexiandexian.com
A leading provider of staffing, IT, and workforce solutions with a global presence, connecting talent, technology, and organizations for game-changing results |
4,431 |
| 7 |
Carahsoftcarahsoft.com
Supports government, education, healthcare, and private sectors. Delivers cybersecurity, FinOps, MultiCloud, DevSecOps, AI, human capital, and legal tech solutions as a master aggregator. |
4,055 |
| 8 |
QBurstqburst.com
A full-service software solutions provider that helps clients enhance business effectiveness by leveraging digital technology |
3,383 |
| 9 |
Perspectaperaton.com
Innovative provider of diverse capabilities in defense, intelligence, healthcare, and more, supporting US government missions with patented solutions and digital transformation services |
2,820 |
| 10 |
10Pearls10pearls.com
A global leader in product innovation and software development, specializing in transforming businesses through digital technology with a focus on social impact |
2,760 |
| 11 |
QTS Data Centersquantumfiber.com
Provider of data center solutions with over 9 million sq ft of space in North America Offers secure infrastructure, connectivity, and premium customer service |
2,591 |
| 12 |
SRA, a CSRA company
A provider of information technology services that acquired CSRA Inc in 2018 and completed a combination with SRA International in 2015 |
2,492 |
| 13 |
AMERICAN SYSTEMSamericansystems.com
Employee-owned federal government contractor providing strategic solutions in IT, test & evaluation, mission support, engineering, and training for national priority programs |
2,212 |
| 14 |
ePlus inc.eplus.com
Leading provider of comprehensive IT solutions, including security, cloud services, data migration, data center management, collaboration, and networking expertise, driven by innovation and customer-centric focus |
2,071 |
| 15 | 2,001 | |
| 16 |
CEB, now Gartnergartner.com
Providing research, advisory services, and technology solutions to help organizations make informed decisions and achieve their strategic priorities for future success |
1,934 |
| 17 |
ASM Researchasmr.com
A provider of technology solutions for the Federal government with expertise in IT, program management, security, healthcare, education, and training |
1,678 |
| 18 |
Agile Defenseagiledefense.com
Innovating IT solutions for US government agencies, transforming operations through a philosophy of listening, thinking, and innovation |
1,572 |
| 19 | 1,569 | |
| 20 |
Koniag Government Serviceskoniag-gs.com
A Native community-focused company delivering Enterprise Solutions, Professional Services, and Operational Management to Federal Government Agencies with a commitment to exceptional service delivery |
1,530 |
| 21 |
Red Riverredriver.com
Provides technology integration services with expertise in security, networking, analytics, collaboration, mobility, and cloud solutions for businesses and government. |
1,527 |
| 22 |
22nd Century Technologies Inc.tscti.com
Providing managed IT services and solutions including digital transformation, cloud migration, cybersecurity, application modernization, and workforce support for government agencies. |
1,392 |
| 23 | 1,386 | |
| 24 |
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 |
| 25 |
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 |
| 26 |
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 |
| 27 |
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 |
| 28 |
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 |
| 29 |
SETsetcorp.com
A small business founded by DARPA scientists in 2002, specializing in creating and commercializing innovative "smart" information technologies for defense and intelligence clients |
1,240 |
| 30 |
DISYSdexian.com
Global technology and consulting specializing in managed services, staffing, and business consulting Experts in IT solutions and diverse staffing partnerships |
1,093 |
| 31 |
CapTechcaptechconsulting.com
A technology consulting firm specializing in solving strategic problems and leveraging the latest innovations to drive organizational success Visit captechconsultingcom for more information |
1,038 |
| 32 |
ISCIteamisci.com
A trusted provider of information solutions, professional services, and cybersecurity for government organizations, delivering excellence through expertise and dedication |
988 |
| 33 |
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 |
| 34 |
Neustar, Inc.home.neustar
Provides identity resolution technology and data services enabling trusted connections between companies and people across marketing, risk, communications, and security sectors. |
945 |
| 35 |
NCI Information Systems, Inclinkedin.com
The company, now known as Empower AI, specializes in artificial intelligence technology Follow their LinkedIn page for updates |
936 |
| 36 |
Vangent, Inc.vangent.com
A global provider of information management and strategic business process services for Federal government, commercial, education, and healthcare organizations Offices in US, UK, and Canada |
911 |
| 37 |
Idexcelidexcel.com
Provider of Professional Services and Technology Solutions specializing in Cloud, Data Platforms, Automation, and AI with global presence and customer-centric focus |
889 |
| 38 |
Iron Bow Technologiesironbow.com
We provide innovative IT solutions and services for government, commercial, and healthcare clients, focusing on collaboration, strategic insight, and continuous advancement in technology |
870 |
| 39 |
Synergysynergybis.com
Federal IT firm specializing in cloud, low/no code SaaS platforms, delivering agile MVP solutions to accelerate agency modernization goals. |
865 |
| 40 |
REI Systemsreisystems.com
Providing innovative technology solutions to federal, state, local, and nonprofit organizations for improved decision-making and streamlined processes. |
862 |
| 41 | 856 | |
| 42 |
CNSIacentra.com
Provider of health information technology solutions for state and federal agencies, delivering innovative, cost-effective products to improve healthcare outcomes for millions of Americans |
836 |
| 43 |
Cognosanteaccenture.com
This company partners with federal agencies to innovate and implement solutions using leading technologies for delivering public services and programs effectively |
816 |
| 44 |
SAP NS2sapns2.com
The company offers cost-effective solutions with quick deployment times, robust support, and cleared personnel for mission-critical applications, leveraging industry-leading software tools and expertise |
791 |
| 45 |
Salient CRGTgovcio.com
Providing comprehensive government IT consulting and management services focused on mission success, innovation, and long-term client partnerships. |
790 |
| 46 |
IonIdeaionidea.com
A technology and business process solutions company focused on delivering excellent products, innovative technologies, and high-quality services through passionate professionals and best practices |
783 |
| 47 |
Sev1Tech LLCsev1tech.com
A provider of innovative technology, high-end engineering, and mission solutions Offering expertise in various functional areas to help customers succeed beyond expectations |
778 |
| 48 |
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 |
| 49 |
Steampunk, Inc.careers-steampunk.icims.com
Federal government-focused company with a startup culture, prioritizing human-centered delivery to drive mission impacts and user experience |
743 |
| 50 |
By Light Professional IT Servicesbylight.com
Hardware and software engineering services provider for defense, civilian, and commercial sectors worldwide, offering reliable and cost-effective IT solutions |
731 |
| 51 |
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 |
| 52 |
Surescriptssurescripts.com
A company that simplifies sharing of health intelligence among healthcare organizations, ensuring secure and timely delivery of information for improved patient care |
710 |
| 53 |
Cynet Systemscynetsystems.com
A top talent supplier in the Washington DC Metro Area, specializing in staffing and recruiting for various industries across North America |
707 |
| 54 |
Kastle Systemskastle.com
Provider of advanced access control, video surveillance, visitor and identity management technologies for commercial, residential, educational, and government properties. |
702 |
| 55 |
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 |
| 56 | 663 | |
| 57 |
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 |
| 58 |
CPGcpgbeyondthecloud.com
This company provides design, construction, and analytics-driven operations solutions for conventional, hyperscale, and edge data centers in North America |
602 |
| 59 |
Core4cecore4ce.com
Mission-oriented company serving national security community by building, modernizing, and defending digital infrastructure with expertise in cyber operations, modernization, engineering, and analysis |
599 |
| 60 |
Mythicsmythics.com
An award-winning Oracle systems integrator, consultant, and managed services provider offering a full range of Oracle products and solutions to various industries worldwide |
567 |
| 61 |
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 |
| 62 |
ActioNet, Inc.actionet.com
A woman-owned IT solutions provider specializing in Cloud-based Solutions, Cyber Security, and Agile Software Engineering, with strong qualifications and expertise |
543 |
| 63 |
Ampcus Incampcus.com
A global technology and business consulting firm specializing in Digital Transformation, Big Data, Analytics, Cyber Security, Testing, and Enterprise Solutions |
535 |
| 64 |
RDSolutionsrdsolutions.io
A pioneering leader in pricing intelligence, offering accurate and timely data to inform retailer strategies and maximize business impact |
514 |
| 65 |
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 |
| 66 |
Zenetexzenetex.com
Specializing in management and technology support services, this company provides IT, engineering, logistics, program management, and training solutions to government and commercial clients |
500 |
| 67 |
Bart & Associates, Inc.bna-inc.com
A leading IT systems integrator offering modernization, integration, operations, human capital management solutions with expertise in CMMI, ISO, ITIL, and Agile best practices |
485 |
| 68 |
Octo, an IBM Companylinktr.ee
Technology firm providing AI, DevSecOps, Cloud, Data Analytics, Cybersecurity, and Low-Code solutions to federal government agencies for modernization. |
470 |
| 69 |
Client Solution Architectscsaassociates.com
A global provider of technology and operational support services to defense and federal government organizations, delivering impactful solutions with excellence and expertise |
469 |
| 70 |
Empower AIempower.ai
Empower AI specializes in boosting workforce productivity for federal agencies through tailored solutions, enabling faster decision-making and mission advancement |
468 |
| 71 |
KiwiTechkiwitech.com
Global innovation ecosystem and partner offering support to startups, enterprises, and government authorities 600+ portfolio startups and clients like World Bank, P&G, and McKinsey |
461 |
| 72 |
SMS Data Products Group, Inc.sms.com
Providing engineering, cybersecurity, and digital transformation solutions to modernize infrastructure, optimize operations, and support federal government missions with quality and integrity. |
455 |
| 73 |
NJVC-LLCchenegamios.com
Innovative IT services provider for government and commercial clients, offering solutions in enterprise services, cybersecurity, IT transformation, data analytics, and automation |
438 |
| 74 |
Amyx, Inc.amyx.com
A management and technical solutions provider for Federal Government clients, offering program management, systems engineering, enterprise architecture, and business process transformation services |
437 |
| 75 |
Collaborative Solutions, LLCcollaborativesolutions.com
A global consultancy specializing in Finance and HR Transformation, leveraging cloud solutions to deliver successful outcomes for clients worldwide |
437 |
| 76 |
UCSucs-inc.com
A rapidly growing government contractor providing Enterprise IT Solutions and Health Services to improve performance across all levels of government |
432 |
| 77 |
Andromeda Systems Incorporatedandrosysinc.com
Experts in reliability, maintenance, engineering, and logistics, offering innovative solutions to enhance asset performance and reduce life-cycle costs for industries |
430 |
| 78 |
hCentive, Inc.hcentive.com
The company specializes in simplifying benefits management through cutting-edge software solutions for government agencies, insurance brokers, employers, and employees |
427 |
| 79 |
ITC Federalitcfederal.com
This company is a federal systems integrator focusing on technical and business solutions through innovative practices and skilled professionals |
421 |
| 80 |
Dark Wolfdarkwolf.io
A provider of agile software development, penetration testing, information operations, and machine learning services to intelligence, national security, and Fortune 500 clients |
417 |
| 81 |
Adaequareadaequare.com
A CMMi Level 3 Certified company with a global presence, focusing on providing precise, cost-effective solutions and transforming enterprise performance for various industries |
415 |
| 82 |
Virginia Information Technologies Agencyvita.virginia.gov
A technology partner for Virginia agencies, VITA connects, protects, and innovates IT services, infrastructure, and cybersecurity for state workers and residents |
409 |
| 83 |
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 |
| 84 |
Drivestreamdrivestream.com
A management and IT consulting firm specializing in migrating enterprise business processes to the Cloud, offering innovative methodologies and comprehensive cloud services |
403 |
| 85 |
TechTammina LLC
Offers digital transformation services automating business processes, custom software and application development, and offshore software development with quality assurance. |
399 |
| 86 |
ControlCasecontrolcase.com
IT compliance company providing peace of mind through proactive, innovative solutions, automation, and comprehensive services for various regulatory requirements in on-premise and cloud environments |
392 |
| 87 |
Zillion Technologies, Inc.zilliontechnologies.com
Provides innovative technology, services, and consulting across digital transformation, AI/ML, cloud, cybersecurity, and IoT for various industries and government entities. |
389 |
| 88 |
Softrams, a Tria Federal Companytriafed.com
Innovative technology solutions for federal industries, specializing in Salesforce, Artificial Intelligence, Cybersecurity, Cloud, and Data services to drive positive transformation |
385 |
| 89 |
Innovative Defense Technologies (IDT)idtus.com
Automated software testing, data analysis, and cybersecurity solutions for DOD's mission-critical systems, enabling faster, more affordable software capabilities deployment |
381 |
| 90 |
Electronic Systems, Inc.xeroxbusinesssolutions.com
Provider of technology and consulting solutions in Virginia, offering end-to-end IT and document services, representing top brands and committed to customer satisfaction |
375 |
| 91 | 373 | |
| 92 |
OST, Inc.ostglobal.com
Solves complex problems and challenges to deliver optimized, value-driven solutions improving business operations and advancing customer missions. |
366 |
| 93 |
Capitol Bridgecapitolbridge.com
A top service provider for State and Federal government clients, specializing in meeting their needs and requirements effectively and efficiently |
365 |
| 94 |
INTEGRITYOne Partnersionep.com
A business and technology services company specializing in helping Federal Government organizations address challenges and implement effective solutions |
359 |
| 95 |
VYZE INCvyzeinc.com
A leading IT staffing company providing contract-hire, direct-hire, and permanent placement services, specializing in matching top tech talent with clients |
350 |
| 96 |
Indus Group Incindus-grp.com
Software development and consulting company dedicated to providing quality, timely, and budget-friendly technical solutions and staffing for clients in science and technology industries |
348 |
| 97 |
Millenniummillgroupinc.com
A cybersecurity company with over 400 experts specializing in Red Team Operations, Defensive Cyber Operations, Software Engineering, and Technical Engineering |
346 |
| 98 |
Softility, Inc.softility.com
Softility leverages data and automation to solve IT, Network, Security, and Cloud Operations challenges for large organizations, driving efficiency and digital transformation through innovative solutions |
345 |
| 99 |
Groundswellgswell.com
A technology integrator dedicated to solving complex challenges for federal agencies, focusing on digital government services to redefine citizen expectations |
343 |
| 100 |
Antra, Inc.antra.com
A technology services provider helping businesses bridge gaps, support growth, enhance IT capabilities, and deliver high-quality & cost-effective solutions |
343 |
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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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The same list elsewhere in United States
- IT Services and IT Consulting companies in the United States 5,237
- IT Services and IT Consulting companies in California 730
- IT Services and IT Consulting companies in Texas 665
- IT Services and IT Consulting companies in New York State 451
- IT Services and IT Consulting companies in New Jersey 366
- IT Services and IT Consulting companies in Florida 296
- IT Services and IT Consulting companies in Georgia 233
- IT Services and IT Consulting companies in Illinois 230
- IT Services and IT Consulting companies in Maryland 154
- IT Services and IT Consulting companies in Massachusetts 147
- IT Services and IT Consulting companies in Pennsylvania 134
- IT Services and IT Consulting companies in Washington State 118
- IT Services and IT Consulting companies in Ohio 109
- IT Services and IT Consulting companies in Michigan 102
- IT Services and IT Consulting companies in North Carolina 93
- IT Services and IT Consulting companies in Alabama 83
- IT Services and IT Consulting companies in Delaware 81
- IT Services and IT Consulting companies in New York 304
- IT Services and IT Consulting companies in Houston 112
- IT Services and IT Consulting companies in Atlanta 100
- IT Services and IT Consulting companies in San Francisco 96
- IT Services and IT Consulting companies in Austin 91
- IT Services and IT Consulting companies in Chicago 86
- IT Services and IT Consulting companies in Irving 77