| Rank | Company | 2012 Federal Government Revenue ($) |
| 1 | Fluor | $1,238,675,000 |
| 2 | URS Corp. | $243,003,486 |
| 3 | AECOM Technology Corp. | $109,000,000 |
| 4 | Parsons Brinckerhoff | $42,703,522 |
| 5 | H&A Architects & Engineers | $37,417,066 |
| 6 | Merrick & Co. | $30,000,000 |
| 7 | Michael Baker Jr. | $14,460,000 |
| 8 | Affiliated Engineers | $9,058,000 |
| 9 | Bridgers & Paxton Consulting Engineers | $5,494,458 |
| 10 | Dewberry | $5,377,009 |
| 11 | SSOE Group | $4,332,078 |
| 12 | BRPH | $4,230,000 |
| 13 | GHT Limited | $4,200,000 |
| 14 | WSP USA | $4,150,000 |
| 15 | KPFF Consulting Engineers | $4,000,000 |
| 16 | Arup | $3,770,046 |
| 17 | RMF Engineering Design | $3,750,000 |
| 18 | Syska Hennessy Group | $3,200,000 |
| 19 | Guernsey | $2,835,981 |
| 20 | Burns & McDonnell | $2,500,000 |
| 21 | STV | $2,286,000 |
| 22 | Wiss, Janney, Elstner Associates | $2,253,000 |
| 23 | GRW | $2,051,368 |
| 24 | Vanderweil Engineers | $2,029,000 |
| 25 | Coffman Engineers | $2,022,000 |
| 26 | CCRD Partners | $2,000,000 |
| 26 | Rolf Jensen & Associates | $2,000,000 |
| 28 | Haynes Whaley Associates | $1,878,235 |
| 29 | Degenkolb Engineers | $1,752,925 |
| 30 | Clark Nexsen | $1,610,728 |
| 31 | Simpson Gumpertz & Heger | $1,600,000 |
| 32 | Newcomb & Boyd | $1,551,855 |
| 33 | Barge, Waggoner, Sumner and Cannon | $1,500,000 |
| 34 | TTG | $1,375,250 |
| 35 | H.F. Lenz | $1,300,000 |
| 36 | Interface Engineering | $1,232,906 |
| 37 | Glumac | $1,172,000 |
| 38 | Eaton Energy Solutions | $1,151,312 |
| 39 | M/E Engineering | $1,134,350 |
| 40 | Spectrum Engineers | $1,024,300 |
| 41 | Walker Parking Consultants | $900,000 |
| 42 | KJWW Engineering Consultants | $874,692 |
| 43 | RDK Engineers | $852,000 |
| 44 | Middough | $800,000 |
| 45 | AKF Group | $753,880 |
| 46 | Science Applications International Corp. | $680,606 |
| 47 | Buro Happold Consulting Engineers | $620,000 |
| 48 | Bergmann Associates | $607,000 |
| 49 | Henderson Engineers | $512,903 |
| 50 | Shive-Hattery | $467,969 |
| 51 | Allen & Shariff | $390,000 |
| 52 | KCI Technologies | $300,000 |
| 53 | Ross & Baruzzini | $218,317 |
| 54 | CTLGroup | $200,000 |
| 55 | Environmental Systems Design | $183,085 |
| 56 | Brinjac Engineering | $167,171 |
| 57 | Dunham Associates | $160,000 |
| 58 | TLC Engineering for Architecture | $151,241 |
| 59 | Aon Fire Protection Engineering | $100,000 |
| 59 | Rist-Frost-Shumway Engineering | $100,000 |
| 61 | Sparling | $88,347 |
| 62 | Thornton Tomasetti | $76,498 |
| 63 | Davis, Bowen & Friedel | $40,000 |
| 64 | Apogee Consulting Group | $25,000 |
| 65 | G&W Engineering | $20,000 |
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