2021 Top 100
26: MANTECH INTERNATIONAL
| Top 100 Revenue: | $1,309,677,000 |
| Defense Revenue: | $560,222,000 |
| Civilian Revenue: | $699,455,000 |
| 2020 Revenue: | $2.5 billion |
| 2020 Earnings: | $120.5 million |
| 2019 Revenue: | N/A |
| 2019 Earnings: | N/A |
| Number of employees: | N/A |
| Headquarters: | Herndon, Virginia |
| Website: | https://www.mantech.com/ |
| Leadership: | N/A |
| Ticker: | Privately held |
| Lines of business: | N/A |
| Major customers: | N/A |
| Major contracts/projects: | N/A |