| 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
Mass Timber | Jul 11, 2023
5 solutions to acoustic issues in mass timber buildings
For all its advantages, mass timber also has a less-heralded quality: its acoustic challenges. Exposed wood ceilings and floors have led to issues with excessive noise. Mass timber experts offer practical solutions to the top five acoustic issues in mass timber buildings.
Multifamily Housing | Jul 11, 2023
Converting downtown office into multifamily residential: Let’s stop and think about this
Is the office-to-residential conversion really what’s best for our downtowns from a cultural, urban, economic perspective? Or is this silver bullet really a poison pill?
Adaptive Reuse | Jul 10, 2023
California updates building code for adaptive reuse of office, retail structures for housing
The California Building Standards Commission recently voted to make it easier to convert commercial properties to residential use. The commission adopted provisions of the International Existing Building Code (IEBC) that allow developers more flexibility for adaptive reuse of retail and office structures.
Laboratories | Jul 10, 2023
U.S. Department of Agriculture opens nation’s first biosafety level 4 containment facility for animal disease research
Replacing a seven-decade-old animal disease center, the National Bio and Agro-Defense Facility includes the nation’s first facility with biosafety containment capable of housing large livestock.
Adaptive Reuse | Jul 6, 2023
The responsibility of adapting historic university buildings
Shepley Bulfinch's David Whitehill, AIA, believes the adaptive reuse of historic university buildings is not a matter of sentimentality but of practicality, progress, and preservation.
Market Data | Jul 5, 2023
Nonresidential construction spending decreased in May, its first drop in nearly a year
National nonresidential construction spending decreased 0.2% in May, according to an Associated Builders and Contractors analysis of data published today by the U.S. Census Bureau. On a seasonally adjusted annualized basis, nonresidential spending totaled $1.06 trillion.
Architects | Jul 5, 2023
Niles Bolton Associates promotes Jeffrey Smith, AIA, to President and C. Cannon Reynolds, AIA, to Managing Director
Niles Bolton Associates (NBA), a leading architecture, planning and design firm, announces leadership changes as a part of its ongoing commitment to future growth. Current Executive Vice President, Jeffrey Smith, AIA, has been named President and C. Cannon Reynolds, AIA, has been named Managing Director effective June 30, 2023.
Mixed-Use | Jun 29, 2023
Massive work-live-play development opens in LA's new Cumulus District
VOX at Cumulus, a 14-acre work-live-play development in Los Angeles, offers 910 housing units and 100,000 sf of retail space anchored by a Whole Foods outlet. VOX, one of the largest mixed-use communities to open in the Los Angeles area, features apartments and townhomes with more than one dozen floorplans.
Office Buildings | Jun 28, 2023
When office-to-residential conversion works
The cost and design challenges involved with office-to-residential conversions can be daunting; designers need to devise creative uses to fully utilize the space.
Architects | Jun 28, 2023
CSHQA hires first CEO in company's 134-year history
The Board of Directors of CSHQA announced the appointment of Ryan D. Martin, AIA NCARB as Chief Executive Officer.
