| Rank | Company | 2013 Engineering Revenue ($) |
| 1 | Fluor Corporation | 585,150,000 |
| 2 | Arup | 136,464,506 |
| 3 | Day & Zimmermann | 130,576,072 |
| 4 | WSP Group | 124,400,000 |
| 5 | Affiliated Engineers | 104,121,000 |
| 6 | KPFF Consulting Engineers | 94,025,000 |
| 7 | Syska Hennessy Group | 93,902,508 |
| 8 | Vanderweil Engineers | 80,334,000 |
| 9 | Simpson Gumpertz & Heger | 71,640,000 |
| 10 | AKF Group | 67,487,000 |
| 11 | Henderson Engineers | 67,409,108 |
| 12 | KJWW Engineering Consultants | 53,874,750 |
| 13 | Smith Seckman Reid | 52,919,312 |
| 14 | M-E Engineers | 48,288,000 |
| 15 | Glumac | 48,000,283 |
| 16 | BR+A Consulting Engineers | 46,000,000 |
| 17 | Magnusson Klemencic Associates | 45,348,511 |
| 18 | Environmental Systems Design | 45,000,000 |
| 19 | TTG | 44,444,960 |
| 20 | Rolf Jensen & Associates | 39,000,000 |
| 21 | Walter P Moore and Associates | 38,940,592 |
| 22 | RDK Engineers | 34,850,000 |
| 23 | TLC Engineering for Architecture | 34,807,545 |
| 24 | DeSimone Consulting Engineers | 34,571,250 |
| 25 | CCRD Partners | 30,200,000 |
| 26 | Coffman Engineers | 28,585,725 |
| 27 | Aon Fire Protection Engineering Corp. | 27,490,000 |
| 28 | Interface Engineering | 25,717,364 |
| 29 | Bala Consulting Engineers | 25,300,000 |
| 30 | I. C. Thomasson Associates | 25,210,000 |
| 31 | Degenkolb Engineers | 23,900,548 |
| 32 | Heapy Engineering | 23,293,500 |
| 33 | Mazzetti | 23,217,528 |
| 34 | Robins & Morton | 21,485,080 |
| 35 | Sparling | 20,957,107 |
| 36 | M/E Engineering | 20,665,840 |
| 37 | KCI Technologies | 18,500,000 |
| 38 | Martin/Martin | 18,488,764 |
| 39 | Joseph R. Loring & Associates | 17,500,000 |
| 40 | Bridgers & Paxton Consulting Engineers | 16,869,537 |
| 41 | KLH Engineers | 16,031,680 |
| 42 | Dunham Associates | 16,000,000 |
| 43 | Wallace Engineering | 14,335,000 |
| 44 | Karpinski Engineering | 14,224,790 |
| 45 | ThermalTech Engineering | 13,600,000 |
| 46 | GHT Limited | 13,260,000 |
| 47 | French & Parrello Associates | 12,518,105 |
| 48 | P2S Engineering | 12,443,860 |
| 49 | Spectrum Engineers | 11,515,076 |
| 50 | CJL Engineering | 10,875,000 |
| 51 | Zak Companies | 9,776,949 |
| 52 | Allen & Shariff | 9,606,286 |
| 53 | Brinjac Engineering | 7,690,671 |
| 54 | Wick Fisher White | 7,442,544 |
| 55 | OLA Consulting Engineers | 6,239,000 |
| 56 | Kamm Consulting | 5,023,662 |
| 57 | G&W Engineering Corp. | 2,757,700 |
| 58 | Total Building Commissioning | 762,246 |
| 59 | Yates Companies, The | 500,000 |
Read the Engineering Giants article
Read BD+C's full 2014 Giants 300 Report
Related Stories
| Aug 11, 2010
Jacobs, HDR top BD+C's ranking of the nation's 100 largest institutional building design firms
A ranking of the Top 100 Institutional Design Firms based on Building Design+Construction's 2009 Giants 300 survey. For more Giants 300 rankings, visit http://www.BDCnetwork.com/Giants
| Aug 11, 2010
Earthquake engineering keeps airport grounded
Istanbul, Turkey's new 2.15 million-sf Sabiha Gökçen International Airport opened on October 31, 2009, becoming the world's largest seismically isolated building. Arup's global airport planning and engineering team, in collaboration with architects Dogan Tekeli Sami Sisa Mimarlik Ofisi and contractor LIMAK-GMR JV, working within an 18-month timeline, designed and built the facility wi...
