| Rank | Company | 2013 EA Revenue ($) |
| 1 | Jacobs | 3,684,260,000 |
| 2 | AECOM Technology Corp. | 1,769,120,000 |
| 3 | Parsons Brinckerhoff | 316,350,284 |
| 4 | URS Corp. | 280,333,336 |
| 5 | Burns & McDonnell | 160,922,332 |
| 6 | Thornton Tomasetti | 145,038,225 |
| 7 | SSOE Group | 114,501,762 |
| 8 | CRBĀ | 96,860,000 |
| 9 | Wiss, Janney, Elstner Associates | 88,887,000 |
| 10 | Dewberry | 78,770,181 |
| 11 | Leidos | 68,080,000 |
| 12 | STV | 64,756,000 |
| 13 | Walker Parking Consultants | 41,278,930 |
| 14 | H&A Architects & Engineers | 40,275,000 |
| 15 | Shive-Hattery | 35,354,309 |
| 16 | RMF Engineering | 33,375,000 |
| 17 | Highland Associates | 33,200,000 |
| 18 | Ross & Baruzzini | 28,125,074 |
| 19 | Barge Waggoner Sumner & Cannon | 24,655,000 |
| 20 | H.F. Lenz | 22,481,858 |
| 21 | Hixson Architecture, Engineering, Interiors | 22,100,000 |
| 22 | Fishbeck, Thompson, Carr & Huber | 20,400,000 |
| 23 | Newcomb & Boyd | 19,686,317 |
| 24 | Gray Construction | 18,720,000 |
| 25 | Paulus, Sokolowski and Sartor | 17,600,000 |
| 26 | Guernsey | 15,463,071 |
| 27 | Graef | 15,396,626 |
| 28 | Integrated Design Group | 13,711,800 |
| 29 | Rist-Frost-Shumway Engineering | 10,250,000 |
| 30 | Stanley Consultants | 7,925,565 |
| 31 | Davis, Bowen & Friedel | 7,150,059 |
| 32 | CTLGroup | 6,270,000 |
| 33 | Primera Engineers | 5,900,000 |
| 34 | Carlson Design Construct | 5,070,000 |
| 35 | Apogee Consulting Group | 4,068,954 |
| 36 | GRW | 3,753,047 |
| 37 | Boldt Company, The | 3,750,000 |
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