| Rank | Company | 2012 Office Revenue ($) |
| 1 | AECOM Technology Corp. | $830,320,000 |
| 2 | Parsons Brinckerhoff | $146,400,000 |
| 3 | Jacobs Engineering Group | $95,180,000 |
| 4 | Burns & McDonnell | $82,020,000 |
| 5 | Thornton Tomasetti | $50,861,467 |
| 6 | Michael Baker Jr. | $50,720,000 |
| 7 | WSP USA | $48,500,162 |
| 8 | Arup | $32,355,607 |
| 9 | Buro Happold Consulting Engineers | $28,720,000 |
| 10 | AKF Group | $26,917,000 |
| 11 | Allen & Shariff | $23,000,000 |
| 12 | Syska Hennessy Group | $22,537,724 |
| 13 | URS Corp. | $22,004,616 |
| 14 | Environmental Systems Design | $19,528,391 |
| 15 | Science Applications International Corp. | $18,346,871 |
| 16 | Dewberry | $16,371,636 |
| 17 | Wiss, Janney, Elstner Associates | $13,850,000 |
| 18 | GHT Limited | $12,944,469 |
| 19 | Glumac | $12,535,000 |
| 20 | Haynes Whaley Associates | $10,928,961 |
| 21 | Magnusson Klemencic Associates | $10,597,664 |
| 22 | Vanderweil Engineers | $10,485,700 |
| 23 | KPFF Consulting Engineers | $10,000,000 |
| 24 | BRPH | $9,800,000 |
| 25 | RDK Engineers | $9,578,000 |
| 26 | Simpson Gumpertz & Heger | $8,500,000 |
| 27 | Clark Nexsen | $6,169,304 |
| 28 | Rolf Jensen & Associates | $6,000,000 |
| 29 | H.F. Lenz | $5,357,000 |
| 30 | H&A Architects & Engineers | $5,239,486 |
| 31 | Joseph R. Loring & Associates | $5,150,000 |
| 32 | Bridgers & Paxton Consulting Engineers | $4,807,632 |
| 33 | ThermalTech Engineering | $3,800,000 |
| 34 | CJL Engineering | $3,521,065 |
| 35 | Smith Seckman Reid | $3,508,905 |
| 36 | STV | $3,505,000 |
| 37 | SSOE Group | $3,380,239 |
| 38 | Newcomb & Boyd | $3,371,710 |
| 39 | Heapy Engineering | $3,362,333 |
| 40 | Sparling | $3,275,463 |
| 41 | TTG | $3,203,930 |
| 42 | Bala Consulting Engineers | $3,160,000 |
| 43 | Walker Parking Consultants | $3,109,222 |
| 44 | M-E Engineers | $3,100,000 |
| 45 | Henderson Engineers | $3,014,367 |
| 46 | Hixson Architecture, Engineering, Interiors | $3,000,000 |
| 47 | TLC Engineering for Architecture | $2,991,691 |
| 48 | Interface Engineering | $2,962,807 |
| 49 | Coffman Engineers | $2,825,000 |
| 50 | Walter P Moore | $2,681,402 |
| 51 | KLH Engineers | $2,600,000 |
| 52 | KJWW Engineering Consultants | $2,352,444 |
| 53 | Karpinski Engineering | $2,179,216 |
| 54 | Aon Fire Protection Engineering | $2,000,000 |
| 55 | Primera Engineers | $1,998,000 |
| 56 | Affiliated Engineers | $1,968,000 |
| 57 | Dunham Associates | $1,750,000 |
| 58 | Spectrum Engineers | $1,745,854 |
| 59 | Peter Basso Associates | $1,700,000 |
| 60 | GRAEF | $1,572,073 |
| 61 | CTLGroup | $1,500,000 |
| 61 | Middough | $1,500,000 |
| 61 | Paulus, Sokolowski and Sartor | $1,500,000 |
| 64 | Degenkolb Engineers | $1,497,172 |
| 65 | Shive-Hattery | $1,480,615 |
| 66 | Wick Fisher White | $1,462,851 |
| 67 | French & Parrello Associates | $1,400,000 |
| 68 | Brinjac Engineering | $1,199,912 |
| 69 | Zak Companies | $1,151,229 |
| 70 | M/E Engineering | $1,134,350 |
| 71 | KCI Technologies | $1,000,000 |
| 71 | OLA Consulting Engineers | $1,000,000 |
| 73 | Kamm Consulting | $947,456 |
| 74 | Mazzetti | $945,119 |
| 75 | Bergmann Associates | $921,000 |
| 76 | Bard, Rao + Athanas Consulting Engineers | $900,000 |
| 77 | Wallace Engineering | $825,000 |
| 78 | CCRD Partners | $700,000 |
| 79 | Eaton Energy Solutions | $613,024 |
| 80 | GRW | $542,150 |
| 81 | G&W Engineering | $450,000 |
| 82 | P2S Engineering | $383,806 |
| 83 | Davis, Bowen & Friedel | $284,349 |
| 84 | Guernsey | $241,535 |
| 85 | Ross & Baruzzini | $225,000 |
| 86 | RMF Engineering Design | $75,000 |
| 87 | Apogee Consulting Group | $59,000 |
| 88 | Total Building Commissioning | $43,810 |
| 89 | Stanley Consultants | $10,107 |
| 90 | FBA Engineering | $10,000 |
Read the Office Sector Giants article
Read BD+C's full Giants 300 Report
Related Stories
| Sep 23, 2013
The art of rewarding employees
What’s the best way to reward those employees who go the extra mile, particularly when it’s not always feasible to give large financial bonuses? According to author and “recognition expert” Dr. Bob Nelson, the most effective employee rewards are also the least expensive.
| Sep 23, 2013
Six-acre Essex Crossing development set to transform vacant New York property
A six-acre parcel on the Lower East Side of New York City, vacant since tenements were torn down in 1967, will be the site of the new Essex Crossing mixed-use development. The product of a compromise between Mayor Michael Bloomberg and various interested community groups, the complex will include ~1,000 apartments.
| Sep 20, 2013
August housing starts reveal multifamily still healthy but single-family stagnating
Peter Muoio, Ph.D., senior principal and economist with Auction.com Research, says the Census Bureau's August Housing Starts data released yesterday hints at improvements in the single-family sector with multifamily slowing down.
| Sep 19, 2013
What we can learn from the world’s greenest buildings
Renowned green building author, Jerry Yudelson, offers five valuable lessons for designers, contractors, and building owners, based on a study of 55 high-performance projects from around the world.
| Sep 19, 2013
6 emerging energy-management glazing technologies
Phase-change materials, electrochromic glass, and building-integrated PVs are among the breakthrough glazing technologies that are taking energy performance to a new level.
| Sep 18, 2013
Annual SteelDay to include 125 free events around the U.S.
Hosted by the American Institute of Steel Construction (AISC), its members and partners, SteelDay invites the AEC community and the public to see the contributions the industry has made in the design and construction of steel buildings and bridges.
| Sep 18, 2013
WHR Architects opens first European office, in Copenhagen
WHR Architects has opened its first European office in Copenhagen, Denmark. The decision to locate in the Danish capital was spurred by the Danish healthcare system’s initiative to renew and expand their facilities across the country.
| Sep 17, 2013
NCARB convenes special task force to explore additional pathways to architectural licensure
Potential new pathways to architectural licensure are being explored through the work of a new Licensure Task Force launched by the National Council of Architectural Registration Boards (NCARB). Led by NCARB Immediate Past President Ronald B. Blitch, FAIA, FACHA, NCARB, the group held its first meeting at NCARB offices on September 6-7 in Washington, DC.
| Sep 17, 2013
SMPS Foundation announces new business development research book
The SMPS Foundation has released its latest research book, A/E/C BUSINESS DEVELOPMENT – The Decade Ahead.
| Sep 17, 2013
Healthcare project will merge outpatient clinic with YMCA to promote wellness and prevention
Penrose-St. Francis Health Services and the YMCA of the Pikes Peak Region announce collaboration, along with developer The Boldt Company, to create next-generation wellness facility.
