| Top 100 international design firms (2007 billings in $ millions)
 | 
      
        |  | Company | Billings
 | 
      
        | 1. | Arup | 979,000,000 | 
      
        | 2. | Jacobs Engineering Group | 806,645,890 | 
      
        | 3. | AECOM Technology Corp. | 478,764,000 | 
      
        | 4. | HOK | 355,659,819 | 
      
        | 5. | Stantec | 166,057,731 | 
      
        | 6. | Parsons Brinckerhoff | 109,600,000 | 
      
        | 7. | Fluor | 97,119,300 | 
      
        | 8. | Skidmore, Owings & Merrill | 87,040,000 | 
      
        | 9. | RMJM | 83,160,000 | 
      
        | 10. | Ingenium Group | 76,720,000 | 
      
        | 11. | Gensler | 73,500,000 | 
      
        | 12. | CH2M HILL | 57,775,960 | 
      
        | 13. | Wimberly Allison Tong & Goo | 46,726,200 | 
      
        | 14. | Burt Hill | 43,632,191 | 
      
        | 15. | Perkins+Will | 40,800,000 | 
      
        | 16. | URS Corp. | 40,000,000 | 
      
        | 17. | NBBJ | 31,539,640 | 
      
        | 18. | Callison | 31,400,000 | 
      
        | 19. | RTKL Associates | 30,634,000 | 
      
        | 20. | Smallwood, Reynolds, Stewart, Stewart | 28,307,681 | 
      
        | 21. | Cannon Design | 27,258,000 | 
      
        | 22. | Rosser International | 24,750,000 | 
      
        | 22. | Swanke Hayden Connell Architects | 24,750,000 | 
      
        | 24. | Arquitectonica | 22,561,800 | 
      
        | 25. | Thompson, Ventulett, Stainback & Associates | 20,251,140 | 
      
        | 26. | Jerde Partnership, The | 19,500,000 | 
      
        | 27. | Thornton Tomasetti | 18,540,000 | 
      
        | 28. | HKS | 17,626,560 | 
      
        | 29. | Anshen+Allen | 15,362,851 | 
      
        | 30. | Ellerbe Becket | 14,871,600 | 
      
        | 31. | CUH2A | 12,803,200 | 
      
        | 32. | BBG-BBGM | 12,000,000 | 
      
        | 33. | Vanderweil Engineers | 11,653,125 | 
      
        | 34. | Day & Zimmerman | 11,250,000 | 
      
        | 35. | Perkins Eastman | 11,220,000 | 
      
        | 36. | TRO Jung|Brannen | 11,115,000 | 
      
        | 37. | Epstein | 10,860,000 | 
      
        | 38. | EYP Mission Critical Facilities | 8,917,708 | 
      
        | 39. | Stanley Consultants | 8,760,000 | 
      
        | 40. | MulvannyG2 Architecture | 8,047,130 | 
      
        | 41. | Studios Architecture | 7,949,031 | 
      
        | 42. | Einhorn Yaffee Prescott | 7,320,000 | 
      
        | 43. | Flack + Kurtz | 6,890,000 | 
      
        | 44. | Leo A Daly | 6,350,000 | 
      
        | 45. | PageSoutherlandPage | 6,190,100 | 
      
        | 46. | M-E Engineers | 6,082,186 | 
      
        | 47. | Clark, Richardson & Biskup Consulting Engineers | 6,033,051 | 
      
        | 48. | M+W Zander | 5,915,000 | 
      
        | 49. | Rolf Jensen & Associates | 5,727,400 | 
      
        | 50. | X-nth | 5,502,949 | 
      
        | 51. | FRCH Design Worldwide | 5,440,000 | 
      
        | 52. | DeStefano and Partners | 5,421,900 | 
      
        | 53. | SSOE | 5,400,000 | 
      
        | 54. | Sasaki Associates | 5,100,000 | 
      
        | 55. | Schirmer Engineering Corp. | 4,569,182 | 
      
        | 56. | KlingStubbins | 4,500,000 | 
      
        | 57. | RNL Design | 4,355,280 | 
      
        | 58. | HDR Architecture | 4,240,000 | 
      
        | 59. | FXFOWLE Architects | 4,200,000 | 
      
        | 60. | Weidlinger Associates | 4,000,000 | 
      
        | 61. | Kaplan McLaughlin Diaz | 3,900,000 | 
      
        | 61. | Steffian Bradley Architects | 3,900,000 | 
      
        | 63. | Burns & McDonnell | 3,780,000 | 
      
        | 64. | Affiliated Engineers | 3,247,250 | 
      
        | 65. | Zimmer Gunsul Frasca Architects | 3,068,342 | 
      
        | 66. | Walter P Moore | 2,881,364 | 
      
        | 67. | Newcomb & Boyd | 2,865,743 | 
      
        | 68. | Nelson | 2,799,432 | 
      
        | 69. | SmithGroup | 2,670,800 | 
      
        | 70. | Adache Group Architects | 2,625,000 | 
      
        | 71. | Syska Hennessy Group | 2,506,280 | 
      
        | 72. | HLW International | 2,497,760 | 
      
        | 73. | Benham Cos., The | 2,395,731 | 
      
        | 74. | Mithun | 2,268,000 | 
      
        | 75. | Environmental Systems Design | 2,262,871 | 
      
        | 76. | Baker and Associates | 2,064,000 | 
      
        | 77. | Haskell Co., The | 2,000,000 | 
      
        | 78. | Shepley Bulfinch Richardson and Abbott | 1,887,828 | 
      
        | 79. | Cuningham Group Architecture | 1,682,471 | 
      
        | 80. | Durrant Group, The | 1,650,000 | 
      
        | 81. | Flad Architects | 1,640,000 | 
      
        | 82. | Joseph R. Loring & Associates | 1,624,820 | 
      
        | 83. | Heery International | 1,533,340 | 
      
        | 84. | Interface Engineering | 1,514,955 | 
      
        | 85. | Albert Kahn Associates | 1,204,000 | 
      
        | 86. | Simpson Gumpertz & Heger | 1,188,300 | 
      
        | 87. | BEI Associates | 1,150,000 | 
      
        | 88. | Merrick & Co. | 1,144,000 | 
      
        | 89. | Harley Ellis Devereaux | 1,110,000 | 
      
        | 89. | TLC Engineering for Architecture | 1,110,000 | 
      
        | 91. | KPFF Consulting Engineers | 1,070,000 | 
      
        | 92. | Beck Group, The | 1,024,480 | 
      
        | 93. | Beyer Blinder Belle Architects & Planners | 1,024,000 | 
      
        | 94. | VOA Associates | 925,800 | 
      
        | 95. | Fentress Architects | 901,469 | 
      
        | 96. | Opus Group, The | 878,000 | 
      
        | 97. | Cooper Carry | 870,480 | 
      
        | 98. | Nadel | 860,000 | 
      
        | 99. | Degenkolb Engineers | 829,760 | 
      
        | 100. | GBBN Architects | 780,000 |