2023 Top 100
| Top 100 Revenue: | $635,540,000 |
| Defense Revenue: | $299,535,000 |
| Civilian Revenue: | $336,005,000 |
| 2022 Revenue: | $4.6 billion |
| 2022 Earnings: | $268.1 million |
| 2021 Revenue: | $4 billion |
| 2021 Earnings: | $409.9 million |
| Number of employees: | 3,500 |
| Headquarters: | Fairfax, Virginia |
| Website: | http://ecstech.com/ |
| Leadership: | John Heneghan, president |
| Ticker: | ASGN |
| Lines of business: | Application services, data and AI, cloud solutions, cybersecurity, enterprise transformation, health IT, human capital management, IoT, IT modernization, machine learning, managed services, mission solutions, biometrics, neuroscience, environmental science, range safety, robotics, radar and sensors, marine and engineering services, unmanned and autonomous aviation |
| Major customers: | Defense, DHS, Justice, Treasury, GSA |
| Major contracts/projects: | Alliant 2, OASIS, CIO-SP3, CIO-CS, Encore III, SEWP V, NetCents, Seaport NxG, GSA schedules |
