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

 

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