2021 Top 100
29: Alion Science and Technology Corp.
| Top 100 Revenue: | $1,177,541,000 |
| Defense Revenue: | $753,489,000 |
| Civilian Revenue: | $424,052,000 |
| 2020 Revenue: | N/A |
| 2020 Earnings: | N/A |
| 2019 Revenue: | N/A |
| 2019 Earnings: | N/A |
| Number of employees: | N/A |
| Headquarters: | McLean, Va. |
| Website: | www.alionscience.com |
| Leadership: | N/A |
| Ticker: | N/A |
| Lines of business: | N/A |
| Major customers: | N/A |
| Major contracts/projects: | N/A |