| Rank | Company | 2012 Healthcare Revenue ($) |
| 1 | AECOM Technology Corp. | $180,210,000 |
| 2 | Jacobs Engineering Group | $77,100,000 |
| 3 | URS Corp. | $43,327,332 |
| 4 | Smith Seckman Reid | $40,105,600 |
| 5 | KPFF Consulting Engineers | $30,000,000 |
| 6 | Affiliated Engineers | $28,217,000 |
| 7 | TTG | $24,719,905 |
| 8 | Parsons Brinckerhoff | $22,700,000 |
| 9 | Dewberry | $21,226,702 |
| 10 | Allen & Shariff | $20,300,000 |
| 11 | Bard, Rao + Athanas Consulting Engineers | $19,000,000 |
| 12 | KJWW Engineering Consultants | $18,937,680 |
| 13 | Mazzetti | $18,293,579 |
| 14 | Degenkolb Engineers | $18,070,782 |
| 15 | CCRD Partners | $18,000,000 |
| 16 | Burns & McDonnell | $16,375,000 |
| 17 | TLC Engineering for Architecture | $13,500,933 |
| 18 | Syska Hennessy Group | $11,495,282 |
| 19 | AKF Group | $10,770,000 |
| 20 | Arup | $9,244,250 |
| 21 | Shive-Hattery | $8,381,840 |
| 22 | Heapy Engineering | $8,159,633 |
| 23 | Zak Companies | $7,640,496 |
| 24 | M-E Engineers | $7,200,000 |
| 24 | RMF Engineering Design | $7,200,000 |
| 26 | Thornton Tomasetti | $6,858,953 |
| 27 | Sparling | $6,768,165 |
| 28 | Buro Happold Consulting Engineers | $6,520,000 |
| 29 | Rolf Jensen & Associates | $6,400,000 |
| 30 | Walter P Moore | $6,232,472 |
| 31 | Michael Baker Jr. | $6,200,000 |
| 32 | SSOE Group | $6,192,909 |
| 33 | Simpson Gumpertz & Heger | $5,700,000 |
| 34 | M/E Engineering | $5,671,750 |
| 35 | Wiss, Janney, Elstner Associates | $5,390,000 |
| 36 | Dunham Associates | $5,000,000 |
| 37 | Vanderweil Engineers | $4,846,600 |
| 38 | Interface Engineering | $4,633,068 |
| 39 | RDK Engineers | $4,572,000 |
| 40 | Karpinski Engineering | $4,438,224 |
| 41 | Clark Nexsen | $4,167,051 |
| 42 | Peter Basso Associates | $4,066,000 |
| 43 | Aon Fire Protection Engineering | $4,000,728 |
| 44 | H.F. Lenz | $3,983,000 |
| 45 | Newcomb & Boyd | $3,942,400 |
| 46 | Bridgers & Paxton Consulting Engineers | $3,879,844 |
| 47 | STV | $3,735,000 |
| 48 | Walker Parking Consultants | $3,719,693 |
| 49 | Science Applications International Corp. | $3,621,708 |
| 50 | Eaton Energy Solutions | $3,502,239 |
| 51 | KCI Technologies | $3,500,000 |
| 52 | Coffman Engineers | $3,350,000 |
| 53 | Spectrum Engineers | $3,338,950 |
| 54 | Glumac | $3,296,000 |
| 55 | WSP USA | $2,411,684 |
| 56 | CJL Engineering | $2,390,686 |
| 57 | Environmental Systems Design | $2,383,822 |
| 58 | KLH Engineers | $2,100,000 |
| 59 | Rist-Frost-Shumway Engineering | $2,000,000 |
| 60 | Apogee Consulting Group | $1,582,000 |
| 61 | Ross & Baruzzini | $1,505,511 |
| 62 | Henderson Engineers | $1,469,261 |
| 63 | Brinjac Engineering | $1,367,836 |
| 64 | GRAEF | $1,335,473 |
| 65 | ThermalTech Engineering | $1,300,000 |
| 66 | Haynes Whaley Associates | $1,226,927 |
| 67 | Bergmann Associates | $1,177,000 |
| 68 | Wick Fisher White | $1,137,773 |
| 69 | Magnusson Klemencic Associates | $1,053,699 |
| 70 | Bala Consulting Engineers | $850,000 |
| 71 | OLA Consulting Engineers | $750,000 |
| 72 | CTLGroup | $700,000 |
| 72 | French & Parrello Associates | $700,000 |
| 74 | Primera Engineers | $620,000 |
| 75 | FBA Engineering | $400,000 |
| 76 | Joseph R. Loring & Associates | $280,000 |
| 77 | G&W Engineering | $232,000 |
| 78 | Wallace Engineering | $225,000 |
| 79 | Stanley Consultants | $219,880 |
| 80 | Davis, Bowen & Friedel | $187,632 |
| 81 | Paulus, Sokolowski and Sartor | $150,000 |
| 82 | P2S Engineering | $76,079 |
| 83 | Total Building Commissioning | $46,144 |
| 84 | Kamm Consulting | $21,025 |
| 85 | Guernsey | $11,668 |
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