CSS: Detailed Company Information & Corporate Profile
Summary
CSS, founded in 1988, operates from Fairfax, Virginia as an independent eco‑management firm with a workforce of 200‑500 employees. The company provides solutions across environmental safety and health, earth, space & life sciences, emergency response and disaster recovery, natural resources management, transportation safety & security, and cross‑cutting support services.
CSS’s portfolio supports clients in Washington Metropolitan Area, leveraging expertise from senior scientists to operational managers to deliver comprehensive assessments, remediation plans and logistical coordination for environmental projects.
Key leaders include Carma Gregerson (Owner), Keith Craig (President & CEO), Laura Nielsen (Vice President, Operations) and Dianne Janczewski (Senior Vice President, Scientific Applications). The organization generates annual revenues between $100 million and $500 million, positioning it as a mid‑market player in the environmental services sector.
| CSS Website | css-inc.com |
| Social Links |  |
| Phone Number | 703.691.4612 |
| Industries | |
| CSS Headquarters Address | 2750 Prosperity Ave, Fairfax, Virginia, 22031 US |
| Company Size | 200-500 employees |
| Specialities & Services | Environmental Safety & Health, Earth, Space & Life Sciences, Emergency Response & Disaster Recovery, Natural Resources Management, Transportation Safety & Security, Cross-Cutting Support Services |
| DMA Code | Washington Metropolitan Area |
| Founded | 1988 |
| Estimated Annual Revenue | $100M - 500M |
| Operating Status | Independent Company |
| Updated: | 2026-09-11 |
Estimated Website Traffic
The chart shows a growth in traffic to the css-inc.com website. In August, traffic increased to 2750, compared to 2479 in the previous month. The highest traffic in 2026 was recorded in March, reaching 4581 visits.
Workforce Turnover
Number of employees switched from or switched to
Departmental sample breakdown
Length of Employment
CSS's workforce includes employees across a wide range of tenure levels.
7% have been with the company for 1 to 2 years3% have been with the company for 3 to 4 years10% have been with the company for 5 to 7 years10% have been with the company for 8 to 10 years70% have been with the company for more than 11 years
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