Top 25 Homeland Security Contractors
Total Purchases: $13,628,504,457
| Rank | Parent Company | Amount | Market Share |
| 1 | Lockheed Martin Corp. | $609,871,999 | 4.47% |
| 2 | IBM Corp. | 512,274,006 | 3.76 |
| 3 | General Dynamics Corp. | 357,344,279 | 2.62 |
| 4 | Computer Sciences Corp. | 341,459,340 | 2.51 |
| 5 | Northrop Grumman Corp. | 340,910,931 | 2.50 |
| 6 | Accenture | 331,858,335 | 2.44 |
| 7 | SAIC | 316,576,047 | 2.32 |
| 8 | Booz Allen Hamilton Inc. | 288,071,135 | 2.11 |
| 9 | L-3 Communications Holdings | 267,566,353 | 1.96 |
| 10 | Unisys Corp. | 261,989,392 | 1.92 |
| 11 | Boeing Co. | 227,216,329 | 1.67 |
| 12 | G4S PLC | 218,310,025 | 1.60 |
| 13 | General Electric Co. | 183,295,973 | 1.34 |
| 14 | Dell Computer Corp. | 168,444,041 | 1.24 |
| 15 | QinetiQ Ltd. | 153,562,761 | 1.13 |
| 16 | URS Corp. | 153,244,523 | 1.12 |
| 17 | Hewlett-Packard Co. | 146,725,890 | 1.08 |
| 18 | Siemens AG | 135,889,438 | 1.00 |
| 19 | Chenega Corp. | 123,005,110 | 0.90 |
| 20 | Fluor Corp. | 117,722,671 | 0.86 |
| 21 | Serco Group PLC | 113,033,744 | 0.83 |
| 22 | Reveal Imaging Technologies Inc. | 109,905,804 | 0.81 |
| 23 | SRA International Inc. | 105,081,260 | 0.77 |
| 24 | TL Industries Inc. | 101,792,707 | 0.75 |
| 25 | Corrections Corp. of America | 101,611,760 | 0.75 |
NEXT STORY: Government Executive : Vol. 42 No. 9 (8/1/10)