| Rank | Company | 2012 K-12 Revenue ($) |
| 1 | AECOM Technology Corp. | $100,150,000 |
| 2 | URS Corp. | $55,927,778 |
| 3 | STV | $45,937,000 |
| 4 | Jacobs Engineering Group | $36,550,000 |
| 5 | Parsons Brinckerhoff | $19,100,000 |
| 6 | TTG | $9,985,300 |
| 7 | Shive-Hattery | $7,379,425 |
| 8 | BRPH | $4,900,000 |
| 9 | KCI Technologies | $4,200,000 |
| 10 | Dewberry | $3,852,971 |
| 11 | KJWW Engineering Consultants | $3,643,844 |
| 12 | Thornton Tomasetti | $3,589,317 |
| 13 | Wiss, Janney, Elstner Associates | $3,570,000 |
| 14 | Joseph R. Loring & Associates | $3,500,000 |
| 15 | KPFF Consulting Engineers | $3,000,000 |
| 16 | M/E Engineering | $2,779,150 |
| 17 | Interface Engineering | $2,745,564 |
| 18 | Simpson Gumpertz & Heger | $2,700,000 |
| 19 | CJL Engineering | $2,507,621 |
| 20 | Rist-Frost-Shumway Engineering | $2,500,000 |
| 21 | FBA Engineering | $2,405,000 |
| 22 | Allen & Shariff | $2,200,000 |
| 23 | Coffman Engineers | $2,140,000 |
| 24 | Heapy Engineering | $2,086,975 |
| 25 | Bridgers & Paxton Consulting Engineers | $2,024,266 |
| 26 | RDK Engineers | $1,975,000 |
| 27 | AKF Group | $1,576,000 |
| 28 | Vanderweil Engineers | $1,553,500 |
| 29 | French & Parrello Associates | $1,500,000 |
| 30 | SSOE Group | $1,473,611 |
| 31 | Glumac | $1,404,000 |
| 32 | Peter Basso Associates | $1,400,000 |
| 33 | Wallace Engineering | $1,350,000 |
| 34 | Henderson Engineers | $1,118,069 |
| 35 | Brinjac Engineering | $1,080,748 |
| 36 | Clark Nexsen | $1,063,791 |
| 37 | G&W Engineering | $1,000,000 |
| 37 | KLH Engineers | $1,000,000 |
| 37 | WSP USA | $1,000,000 |
| 40 | TLC Engineering for Architecture | $933,884 |
| 41 | H.F. Lenz | $847,000 |
| 42 | Davis, Bowen & Friedel | $833,642 |
| 43 | Sparling | $785,356 |
| 44 | Primera Engineers | $748,000 |
| 45 | M-E Engineers | $700,000 |
| 46 | Environmental Systems Design | $610,185 |
| 47 | Paulus, Sokolowski and Sartor | $500,000 |
| 48 | RMF Engineering Design | $500,000 |
| 49 | OLA Consulting Engineers | $400,000 |
| 50 | Rolf Jensen & Associates | $400,000 |
| 51 | Karpinski Engineering | $379,369 |
| 52 | Bala Consulting Engineers | $350,000 |
| 53 | Eaton Energy Solutions | $312,320 |
| 54 | Wick Fisher White | $300,697 |
| 55 | Apogee Consulting Group | $278,000 |
| 56 | Arup | $251,475 |
| 57 | Aon Fire Protection Engineering | $200,000 |
| 57 | GHT Limited | $200,000 |
| 59 | Mazzetti | $182,262 |
| 60 | Dunham Associates | $150,000 |
| 61 | GRW | $135,860 |
| 62 | Magnusson Klemencic Associates | $109,780 |
| 63 | Science Applications International Corp. | $109,282 |
| 64 | Barge, Waggoner, Sumner and Cannon | $100,000 |
| 64 | CTLGroup | $100,000 |
| 66 | Degenkolb Engineers | $97,850 |
| 67 | P2S Engineering | $86,100 |
| 68 | Spectrum Engineers | $83,820 |
| 69 | Affiliated Engineers | $55,000 |
| 70 | Kamm Consulting | $45,861 |
| 71 | Newcomb & Boyd | $42,814 |
| 72 | Haynes Whaley Associates | $34,139 |
| 73 | Walter P Moore | $29,068 |
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