| Rank | Company | 2012 Multifamily Revenue ($) |
| 1 | STV | $42,284,000 |
| 2 | URS Corp. | $42,072,070 |
| 3 | AECOM Technology Corp. | $39,580,000 |
| 4 | Parsons Brinckerhoff | $37,500,000 |
| 5 | Michael Baker Jr. | $21,020,000 |
| 6 | Buro Happold Consulting Engineers | $20,430,000 |
| 7 | Wiss, Janney, Elstner Associates | $18,070,000 |
| 8 | Thornton Tomasetti | $13,899,030 |
| 9 | KPFF Consulting Engineers | $13,000,000 |
| 10 | Simpson Gumpertz & Heger | $10,200,000 |
| 11 | WSP USA | $9,500,191 |
| 12 | Arup | $7,452,506 |
| 13 | Magnusson Klemencic Associates | $6,754,614 |
| 14 | Dewberry | $5,927,378 |
| 15 | KCI Technologies | $4,000,000 |
| 16 | Science Applications International Corp. | $3,142,018 |
| 17 | Walker Parking Consultants | $3,109,222 |
| 18 | Aon Fire Protection Engineering | $3,010,000 |
| 19 | Paulus, Sokolowski and Sartor | $2,800,000 |
| 20 | AKF Group | $2,008,000 |
| 21 | Rolf Jensen & Associates | $2,000,000 |
| 22 | Glumac | $1,958,000 |
| 23 | Bala Consulting Engineers | $1,950,000 |
| 24 | Haynes Whaley Associates | $1,755,846 |
| 25 | CTLGroup | $1,700,000 |
| 26 | M-E Engineers | $1,500,000 |
| 27 | Allen & Shariff | $1,450,000 |
| 28 | Interface Engineering | $1,397,312 |
| 29 | TLC Engineering for Architecture | $1,347,023 |
| 30 | Clark Nexsen | $1,243,665 |
| 31 | M/E Engineering | $1,134,350 |
| 32 | Davis, Bowen & Friedel | $1,131,802 |
| 33 | Coffman Engineers | $1,075,000 |
| 34 | Barge, Waggoner, Sumner and Cannon | $1,000,000 |
| 34 | French & Parrello Associates | $1,000,000 |
| 36 | H&A Architects & Engineers | $804,768 |
| 37 | GRAEF | $801,255 |
| 38 | Smith Seckman Reid | $784,137 |
| 39 | RDK Engineers | $739,000 |
| 40 | Vanderweil Engineers | $737,700 |
| 41 | Apogee Consulting Group | $718,000 |
| 42 | KJWW Engineering Consultants | $673,446 |
| 43 | Walter P Moore | $606,875 |
| 44 | Guernsey | $573,651 |
| 45 | Sparling | $500,395 |
| 46 | TTG | $450,250 |
| 47 | GHT Limited | $400,000 |
| 48 | Henderson Engineers | $368,297 |
| 49 | OLA Consulting Engineers | $350,000 |
| 50 | RMF Engineering Design | $300,000 |
| 51 | G&W Engineering | $225,000 |
| 52 | Newcomb & Boyd | $212,680 |
| 53 | Mazzetti | $193,774 |
| 54 | Kamm Consulting | $157,300 |
| 55 | Wallace Engineering | $150,000 |
| 56 | Karpinski Engineering | $148,594 |
| 57 | Joseph R. Loring & Associates | $140,000 |
| 58 | Environmental Systems Design | $128,159 |
| 59 | Stanley Consultants | $121,742 |
| 60 | FBA Engineering | $100,000 |
| 61 | Eaton Energy Solutions | $77,000 |
| 62 | Jacobs Engineering Group | $59,000 |
| 63 | Heapy Engineering | $54,477 |
| 64 | Dunham Associates | $50,000 |
| 65 | Wick Fisher White | $48,762 |
| 66 | Degenkolb Engineers | $24,624 |
| 67 | Total Building Commissioning | $16,360 |
