| Rank | Company | 2012 Hospitality Revenue ($) |
| 1 | AECOM Technology Corp. | $100,190,000 |
| 2 | Parsons Brinckerhoff | $28,900,000 |
| 3 | Buro Happold Consulting Engineers | $16,165,000 |
| 4 | Rolf Jensen & Associates | $7,600,000 |
| 5 | Thornton Tomasetti | $7,218,731 |
| 6 | KPFF Consulting Engineers | $6,000,000 |
| 7 | Arup | $5,527,371 |
| 8 | Michael Baker Jr. | $4,340,000 |
| 9 | Wiss, Janney, Elstner Associates | $2,880,000 |
| 10 | WSP USA | $2,696,642 |
| 11 | Simpson Gumpertz & Heger | $2,200,000 |
| 11 | Aon Fire Protection Engineering | $2,000,000 |
| 13 | Clark Nexsen | $1,450,223 |
| 14 | Vanderweil Engineers | $1,272,800 |
| 15 | Glumac | $1,252,000 |
| 16 | Magnusson Klemencic Associates | $1,239,089 |
| 17 | Bala Consulting Engineers | $1,200,000 |
| 18 | M/E Engineering | $1,134,350 |
| 19 | TLC Engineering for Architecture | $973,982 |
| 20 | Environmental Systems Design | $971,399 |
| 21 | M-E Engineers | $900,000 |
| 22 | H&A Architects & Engineers | $863,474 |
| 23 | Paulus, Sokolowski and Sartor | $750,000 |
| 24 | AKF Group | $739,000 |
| 25 | KJWW Engineering Consultants | $651,984 |
| 26 | KLH Engineers | $524,215 |
| 27 | Walter P Moore | $495,971 |
| 28 | GHT Limited | $450,000 |
| 29 | Science Applications International Corp. | $426,888 |
| 30 | Interface Engineering | $425,984 |
| 31 | Allen & Shariff | $400,000 |
| 32 | Walker Parking Consultants | $360,240 |
| 33 | Bridgers & Paxton Consulting Engineers | $337,378 |
| 34 | Haynes Whaley Associates | $301,003 |
| 35 | CTLGroup | $300,000 |
| 36 | RDK Engineers | $281,000 |
| 37 | Henderson Engineers | $272,858 |
| 38 | H.F. Lenz | $272,000 |
| 39 | Smith Seckman Reid | $270,470 |
| 40 | Syska Hennessy Group | $265,788 |
| 41 | Primera Engineers | $211,000 |
| 42 | Coffman Engineers | $200,000 |
| 43 | Joseph R. Loring & Associates | $155,000 |
| 44 | Wallace Engineering | $150,000 |
| 45 | GRAEF | $143,034 |
| 46 | Dunham Associates | $125,000 |
| 47 | Karpinski Engineering | $109,499 |
| 48 | Barge, Waggoner, Sumner and Cannon | $100,000 |
| 48 | ThermalTech Engineering | $100,000 |
| 50 | Heapy Engineering | $96,897 |
| 51 | Spectrum Engineers | $89,390 |
| 52 | Newcomb & Boyd | $87,850 |
| 53 | TTG | $85,000 |
| 54 | Mazzetti | $57,094 |
| 55 | Sparling | $40,399 |
| 56 | Dewberry | $33,605 |
| 57 | FBA Engineering | $30,000 |
| 58 | Degenkolb Engineers | $14,192 |
| 59 | Davis, Bowen & Friedel | $10,521 |
| 60 | Kamm Consulting | $3,500 |
| 61 | Shive-Hattery | $3,055 |
| 62 | French & Parrello Associates | $3,000 |
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