| # | Company | Employees |
|---|---|---|
| 1 |
Prince William County Public Schoolspwcs.edu
This company provides a world-class education to over 89,000 students in Northern Virginia through innovative programs, professional development, and career opportunities |
7,708 |
| 2 |
ISCIteamisci.com
A trusted provider of information solutions, professional services, and cybersecurity for government organizations, delivering excellence through expertise and dedication |
988 |
| 3 | 904 | |
| 4 |
Aurora Flight Sciencesaurora.aero
They advance the future of flight by developing innovations in aircraft configurations, autonomous systems, propulsion technologies, and manufacturing processes |
800 |
| 5 |
UVA Community Healthcommunityhealthcareers.uvahealth.org
A healthcare network in Northern Virginia consisting of community hospitals, medical practices, outpatient centers, physicians, and team members delivering high-quality care |
613 |
| 6 |
Didlakedidlake.org
A nonprofit agency providing employment and support services for individuals with disabilities in Virginia, Maryland, and Washington, DC, while also offering government contract services |
522 |
| 7 |
Eagle Harbor, LLCthreesaintsbay.com
A Government Support Services company owned by an Alaska Native Corporation, providing a variety of services including procurement, engineering, IT, training, and logistics |
452 |
| 8 |
Progeny Systems-A General Dynamics Mission Systems Businessgdmissionsystems.com
Specializing in software/hardware solutions for defense, Progeny Systems supports military branches with submarine modernization, acoustics, cybersecurity, weapon control, and surveillance technologies |
397 |
| 9 | 360 | |
| 10 |
Any Communication Inc.anycomm.co
A private communication company established in 1999, with offices in VA, MD, and TX, focused on offering career opportunities and fostering growth |
353 |
| 11 |
Rinker Design Associates, LLCrdacivil.com
A client-oriented civil engineering consulting firm in Virginia offering high-quality services to municipalities, government agencies, and private entities since 1982 |
199 |
| 12 |
Prince William County Police Departmentlinktr.ee
A nationally accredited law enforcement agency in Prince William County providing 24/7 coverage and aiming to enhance public trust and quality of life |
196 |
| 13 |
Cyret Technologiescyret.com
Leading technology consulting and outsourcing organization specializing in ERP solutions and robotic process automation for international organizations in various industries worldwide |
193 |
| 14 |
American Disposal Servicesamericandisposal.com
Locally operated solid waste and recycling collection company in Virginia, serving residential, commercial, and roll off customers with a focus on environmental responsibility and community education |
173 |
| 15 |
Color Me Beautiful Inccolormebeautiful.com
A leading cosmetics and skincare company offering color analysis, products for women of color, advanced anti-aging skincare, and Hollywood glam products worldwide |
170 |
| 16 | 166 | |
| 17 |
LTM INC.ltminc.net
Employee-owned company in Virginia offering supply chain, logistics, aviation engineering, consulting, project management, and task tracking services to government and commercial clients |
158 |
| 18 |
USA Millworkusa-millwork.com
Specializing in custom millwork and commercial casework, we offer turn-key solutions, leveraging extensive supplier networks, project management systems, and industry-leading technology Join our team! |
157 |
| 19 |
Mediatechcorning.com
A leading Life Science company providing high quality cell culture media, molecular biology reagents, and custom products for research and production |
155 |
| 20 |
Logis-Tech, LLClogis-tech.com
Specializing in logistics solutions, humidity control systems, and information technology services for commercial and government customers worldwide since 1987 |
129 |
| 21 |
Dulles Glassdullesglass.com
A leading retailer and manufacturer of custom-cut glass, mirror, and shower door products for residential and commercial customers across the US |
86 |
| 22 |
Shibuya Hoppmann Corporationshibuyahoppmann.com
Leading engineering machine manufacturer specializing in automated industrial equipment for pharmaceutical, food, and personal care industries, offering innovative solutions for various products |
78 |
| 23 |
Aviation Adventuresaviationadventures.com
Flight school with experienced instructors offering flexible training programs and top-quality aircraft equipped with the latest technology for pilot training and rentals |
75 |
| 24 |
UPERIO USAuperiousa.com
largest tower crane rental fleet worldwide, exclusive distributor, sales, repair, parts, engineering, certification, and logistics services |
38 |
| 25 |
OHI Designohidesign.com
A premier home improvement source in the DC Metro area, specializing in kitchen, bathroom, basement remodeling, window replacement, and door installation, with a focus on exceeding customer expectations |
10 |
| 26 |
Beltway Glazing LLCbeltwayglazing.com
Glass solutions provider offering custom glass products, frame solutions, door systems, and accessories Specializes in transforming spaces with transparency and functionality |
7 |
| 27 |
Golkin Enterprisesgolkin.org
Golkin Enterprises invests in passionate businesses aiming to make a positive impact, focusing on growth through strategic leadership and development |
5 |
| 28 |
Eco Power LLCecopowerllc.net
An engineering company promoting intelligent energy use through efficient solutions and incorporation of renewable electricity generation alternatives |
4 |
| 29 |
SGS Builders, Inc.sgsbuilders.com
A design/build company specializing in home remodeling and additions, dedicated to delivering high-quality results within budget and exceeding client expectations |
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 Oct 24, 2026.
The same list elsewhere in United States
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- The largest companies in New York State 10,485
- The largest companies in Texas 8,086
- The largest companies in Florida 4,945
- The largest companies in Illinois 4,175
- The largest companies in Pennsylvania 3,110
- The largest companies in Massachusetts 3,093
- The largest companies in Georgia 2,632
- The largest companies in Ohio 2,618
- The largest companies in New Jersey 2,569
- The largest companies in Virginia 2,503
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- The largest companies in North Carolina 2,174
- The largest companies in Alabama 1,806
- The largest companies in Washington State 1,785
- The largest companies in Colorado 1,774
- The largest companies in Minnesota 1,700
- The largest companies in Maryland 1,527
- The largest companies in Wisconsin 1,482
- The largest companies in New York 6,920
- The largest companies in San Francisco 2,030
- The largest companies in Houston 1,791
- The largest companies in Chicago 1,668