| 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 28, 2013
Federal Government Report [2013 Giants 300 Report]
Building Design+Construction's rankings of the nation's largest federal government design and construction firms, as reported in the 2013 Giants 300 Report.
| Aug 26, 2013
What you missed last week: Architecture billings up again; record year for hotel renovations; nation's most expensive real estate markets
BD+C's roundup of the top construction market news for the week of August 18 includes the latest architecture billings index from AIA and a BOMA study on the nation's most and least expensive commercial real estate markets.
| Aug 22, 2013
Energy-efficient glazing technology [AIA Course]
This course discuses the latest technological advances in glazing, which make possible ever more efficient enclosures with ever greater glazed area.
| Aug 21, 2013
Why research is the ticket to successful airport wayfinding
Wayfinding is more than just signs; it requires a holistic approach based on communicating information that helps people make the right decision at the right time.
| Aug 19, 2013
Discovery of hidden asbestos complicates DFW terminal renovations
The finding of more asbestos in Terminal B than expected, and the pending merger of US Airways and the airport’s largest tenant, American Airlines, is causing construction delays on a $2.3 billion Dallas/Fort Worth Airport terminal renovation.
| Aug 19, 2013
Integration of solar panels in building skin seen as key net-zero element
Recent high-profile projects, including stadiums in Brazil for the upcoming World Cup and Summer Olympics and a bank headquarters in the U.K., reflect an effort by designers to adopt building-integrated photovoltaics, or BIPV.
| Aug 14, 2013
Green Building Report [2013 Giants 300 Report]
Building Design+Construction's rankings of the nation's largest green design and construction firms.
| Jul 29, 2013
2013 Giants 300 Report
The editors of Building Design+Construction magazine present the findings of the annual Giants 300 Report, which ranks the leading firms in the AEC industry.
| Jul 22, 2013
Transportation Facility Report [2013 Giants 300 Report]
Building Design+Construction's rankings of design and construction firms with the most revenue from airport terminals and other transportation-related facilities, as reported in the 2013 Giants 300 Report.
| Jul 19, 2013
Renovation, adaptive reuse stay strong, providing fertile ground for growth [2013 Giants 300 Report]
Increasingly, owners recognize that existing buildings represent a considerable resource in embodied energy, which can often be leveraged for lower front-end costs and a faster turnaround than new construction.
