Jacobs, WSP, Alfa Tech, and AECOM head BD+C's ranking of the nation's largest office building sector engineering and engineering/architecture (EA) firms for 2023, as reported in Building Design+Construction's 2023 Giants 400 Report. Note: This ranking includes revenue for all office building work, including core and shell projects and workplace/interior fitouts.
| Top 90 Office Building Engineering Firms for 2023 | ||
| FIRM | 2022 REVENUE | |
| 1 | Jacobs | $501,900,000 |
| 2 | WSP | $229,374,531 |
| 3 | Alfa Tech Consulting Engineers | $189,600,000 |
| 4 | AECOM | $143,500,000 |
| 5 | Thornton Tomasetti | $108,370,385 |
| 6 | Tetra Tech High Performance Buildings Group | $99,232,278 |
| 7 | Burns & McDonnell | $89,406,860 |
| 8 | Langan | $56,000,000 |
| 9 | NV5 Global | $55,437,190 |
| 10 | Dewberry | $43,161,478 |
| 11 | Arup | $41,669,328 |
| 12 | Kimley-Horn | $38,770,000 |
| 13 | McKinstry | $36,500,000 |
| 14 | Syska Hennessy Group | $33,391,448 |
| 15 | IMEG | $33,384,600 |
| 16 | Whitman, Requardt & Associates | $32,135,807 |
| 17 | Jaros, Baum & Bolles | $31,858,640 |
| 18 | ESD (now Stantec Consulting Services, Inc.) | $25,951,483 |
| 19 | BKF Engineers | $24,265,923 |
| 20 | Salas O'Brien | $23,063,328 |
| 21 | Walter P Moore | $19,609,845 |
| 22 | Vanderweil Engineers | $18,931,700 |
| 23 | Magnusson Klemencic Associates | $18,636,703 |
| 24 | AKF | $17,605,450 |
| 25 | Ghafari Associates | $15,504,000 |
| 26 | Wiss, Janney, Elstner Associates | $13,583,000 |
| 27 | EXP | $12,448,000 |
| 28 | KPFF Consulting Engineers | $11,492,458 |
| 29 | Morrison Hershfield | $11,310,275 |
| 30 | ME Engineers | $10,900,000 |
| 31 | Woolpert | $10,500,000 |
| 32 | Interface Engineering | $10,197,764 |
| 33 | ISG | $9,697,144 |
| 34 | CMTA | $9,249,535 |
| 35 | TLC Engineering Solutions | $9,230,758 |
| 36 | CDM Smith | $8,266,739 |
| 37 | Bala Consulting Engineers | $8,253,750 |
| 38 | SSOE | $8,235,854 |
| 39 | Teecom | $7,914,282 |
| 40 | Shive-Hattery | $7,551,958 |
| 41 | Affiliated Engineers | $7,487,915 |
| 42 | Newcomb & Boyd | $7,012,642 |
| 43 | DLZ Corporation | $6,391,719 |
| 44 | Dunham Associates | $5,500,000 |
| 45 | Farnsworth Group | $4,843,851 |
| 46 | KCI Technologies | $4,782,470 |
| 47 | Highland Associates | $4,400,000 |
| 48 | Henderson Engineers | $4,322,196 |
| 49 | DeSimone Consulting Engineering | $4,122,428 |
| 50 | Halff | $3,882,000 |
| 51 | Martin/Martin | $3,835,138 |
| 52 | Bridgers & Paxton Consulting Engineers | $3,815,321 |
| 53 | Kohrs Lonnemann Heil Engineers (KLH) | $3,332,503 |
| 54 | Karpinski Engineering | $3,130,000 |
| 55 | Smith Seckman Reid (SSR) | $2,562,228 |
| 56 | PRIME AE Group | $2,541,926 |
| 57 | Wallace Design Collective | $2,500,000 |
| 58 | RTM Engineering Consultants | $2,410,950 |
| 59 | Heapy | $2,346,196 |
| 60 | Stanley Consultants | $2,325,818 |
| 61 | Osborn Engineering | $2,250,000 |
| 62 | GRAEF | $2,037,711 |
| 63 | Hixson Architecture, Engineering, Interiors | $2,000,000 |
| 64 | I.C. Thomasson Associates | $1,800,000 |
| 65 | Davis, Bowen & Friedel | $1,646,321 |
| 66 | PBS Engineers | $1,525,000 |
| 67 | M/E Engineering | $1,525,000 |
| 68 | Jordan & Skala Engineers | $1,276,230 |
| 69 | PCS Structural Solutions | $1,275,976 |
| 70 | PS&S | $1,170,236 |
| 71 | Burns Engineering | $1,105,093 |
| 72 | Bennett & Pless | $1,000,834 |
| 73 | BRPH Companies | $1,000,000 |
| - | ThermalTech Engineering | $1,000,000 |
| 75 | Wick Fisher White | $912,602 |
| 76 | Schaefer | $905,670 |
| 77 | JP Harvey Engineering Solutions | $875,241 |
| 78 | EAPC Architects Engineers | $873,552 |
| 79 | KCL Engineering | $865,241 |
| 80 | Kohler Ronan | $819,989 |
| 81 | JQ Engineering | $695,577 |
| 82 | EVstudio | $664,000 |
| 83 | Mazzetti | $650,000 |
| 84 | Primera Engineers | $610,693 |
| 85 | SSC Engineering | $465,000 |
| 86 | DH Engineering | $440,989 |
| 87 | Swanson Rink | $419,856 |
| 88 | BG Buildingworks | $380,000 |
| 89 | Henderson Building Solutions | $350,441 |
| 90 | Parametrix | $324,561 |
| 91 | P2S | $287,338 |
| 92 | H.F. Lenz | $273,182 |
| 93 | French & Parrello Associates | $217,080 |
| 94 | raSmith | $194,492 |
| 95 | Arora Engineers | $64,333 |
Source: 2023 Giants 400 Report
2023 GIANTS 400 REPORT - TOP ARCHITECTURE FIRMS, ENGINEERING FIRMS, AND CONSTRUCTION COMPANIES
A. Top 175 Architecture Firms
B. Top 115 Architecture/Engineering (AE) Firms
C. Top 75 Engineering Firms
D. Top 35 Engineering/Architecture (EA) Firms
E. Top 150 Contractors
F. Top 80 Construction Management Firms
2023 GIANTS 400 REPORT - TOP AEC FIRMS BY BUILDING SECTOR AND SPECIALTY RANKINGS
Note: All categories below except for 08 and 23 include multiple rankings for the sector: Top Architecture+AE Firms; Top Engineering+EA Firms; and Top Contractors+CM Firms.
01. Airport Terminals
• Top 65 Airport Terminal Architecture and AE Firms
• Top 65 Airport Terminal Engineering and EA Firms
• Top 60 Airport Terminal Contractors and CM Firms
02. Convention Centers/Conference Centers
• Top 40 Convention Center Architecture + AE Firms
• Top 30 Convention Center Engineering + EA Firms
• Top 20 Convention Center Contractors + CM Firms
03. Cultural Facilities – All Cultural Facilities Work
• Top 110 Cultural Facilities Architecture and AE Firms – All Cultural Facilities Work
• Top 60 Cultural Facilities Engineering and EA Firms – All Cultural Facilities Work
• Top 65 Cultural Facilities Contractors and CM Firms – All Cultural Facilities Work
04. Cultural Facilities – Museums and Galleries
• Top 70 Cultural Facilities Architecture and AE Firms – Museums and Galleries
• Top 40 Cultural Facilities Engineering and EA Firms – Museums and Galleries
• Top 40 Cultural Facilities Contractors and CM Firms – Museums and Galleries
05. Cultural Facilities – Performing Arts and Concert Venues
• Top 60 Cultural Facilities Architecture and AE Firms – Performing Arts and Concert Venues
• Top 40 Cultural Facilities Engineering and EA Firms – Performing Arts and Concert Venues
• Top 35 Cultural Facilities Contractors and CM Firms – Performing Arts and Concert Venues
06. Cultural Facilities – Public Libraries
• Top 50 Cultural Facilities Architecture and AE Firms – Public Libraries
• Top 30 Cultural Facilities Engineering and EA Firms – Public Libraries
• Top 20 Cultural Facilities Contractors and CM Firms – Public Libraries
07. Data Centers
• Top 30 Data Center Sector Architecture and AE Firms
• Top 60 Data Center Sector Engineering and EA Firms
• Top 50 Data Center Sector Contractors and CM Firms
08. Design-Build Work
• Top 90 Design-Build Construction Firms
09. Government - All Government Buildings Work
• Top 170 Government Sector Architecture + AE Firms - All Government Work
• Top 90 Government Sector Engineering + EA Firms - All Government Work
• Top 100 Government Sector Contractors + CM Firms - All Government Work
10. Government - Federal Civilian Government
• Top 70 Federal Government Architecture + AE Firms
• Top 60 Federal Government Engineering + EA Firms
• Top 50 Federal Government Contractors + CM Firms
11. Government - Local Government Buildings
• Top 150 Local Government Architecture + AE Firms
• Top 80 Local Government Engineering + EA Firms
• Top 80 Local Government Contractors + CM Firms
12. Government - State Government Buildings
• Top 90 State Government Architecture + AE Firms
• Top 50 State Government Engineering + EA Firms
• Top 50 State Government Contractors + CM Firms
13. Government - Military
• Top 40 Military Facility Architecture + AE Firms
• Top 50 Military Facility Engineering + EA Firms
• Top 35 Military Facility Contractors + CM Firms
14. Government - Veterans Administration Facilities
• Top 35 Veterans Affairs (VA) Facility Architecture + AE Firms
• Top 20 Veterans Affairs (VA) Facility Engineering + EA Firms
• Top 15 Veterans Affairs (VA) Facility Contractors + CM Firms
15. Healthcare – All Healthcare Facilities Work
• Top 175 Healthcare Sector Architecture and AE Firms
• Top 90 Healthcare Sector Engineering and EA Firms
• Top 115 Healthcare Sector Contractors and CM Firms
16. Healthcare – Hospitals
• Top 130 Hospital Facility Architecture and AE Firms
• Top 80 Hospital Facility Engineering and EA Firms
• Top 90 Hospital Facility Contractors and CM Firms
17. Healthcare – Medical Office Buildings, Dental Offices
• Top 110 Medical Office Building Architecture and AE Firms
• Top 50 Medical Office Building Engineering and EA Firms
• Top 70 Medical Office Building Contractors and CM Firms
18. Healthcare – Outpatient Facilities
• Top 100 Outpatient Facility Architecture and AE Firms
• Top 40 Outpatient Facility Engineering and EA Firms
• Top 60 Outpatient Facility Contractors and CM Firms
19. Hospitality – All Hospitality Facilities Work (Hotels, Resorts, Casinos)
• Top 130 Hospitality Facility Sector Architecture and AE Firms
• Top 75 Hospitality Facility Engineering and EA Firms
• Top 80 Hospitality Facility Contractors and CM Firms
20. Hospitality — Hotel, Resorts
• Top 120 Hotel Sector Architecture and AE Firms
• Top 70 Hotel and Resort Engineering and EA Firms
• Top 80 Hotel and Resort Contractors and CM Firms
21. Hospitality — Casinos
• Top 10 Casino Architecture and AE Firms
• Top 25 Casino Engineering and EA Firms
• Top 25 Casino Contractors and CM Firms
22. Industrial Buildings — Manufacturing Plants, Warehouses
• Top 100 Industrial Facility Architecture and AE Firms
• Top 90 Industrial Facility Engineering and EA Firms
• Top 100 Industrial Facility Contractors and CM Firms
23. Integrated Project Delivery (IPD)
• Top 20 Integrated Project Delivery (IPD) Construction Firms
24. Multifamily — All Multifamily Facilities Work
Top 190 Multifamily Sector Architecture and AE Firms — All Multifamily Facilities Work
Top 75 Multifamily Sector Engineering and EA Firms — All Multifamily Facilities Work
Top 115 Multifamily Sector Contractors and CM Firms — All Multifamily Facilities Work
25. Multifamily — Apartments, Condominiums
Top 160 Multifamily Sector Architecture and AE Firms — Apartments, Condominiums Work
Top 70 Multifamily Sector Engineering and EA Firms — Apartments, Condominiums Work
Top 100 Multifamily Sector Contractors and CM Firms — Apartments, Condominiums Work
26. Multifamily — Senior Living Facilities
Top 80 Multifamily Sector Architecture and AE Firms — Senior Living Facilities
Top 40 Multifamily Sector Engineering and EA Firms — Senior Living Facilities
Top 60 Multifamily Sector Contractors and CM Firms — Senior Living Facilities
27. Multifamily — Student Housing Facilities
Top 90 Multifamily Sector Architecture and AE Firms — Student Housing Facilities
Top 30 Multifamily Sector Engineering and EA Firms — Student Housing Facilities
Top 40 Multifamily Sector Contractors and CM Firms — Student Housing Facilities
28. Office — All Office Building Work
• Top 200 Office Sector Architecture and AE Firms
• Top 90 Office Sector Engineering and EA Firms
• Top 120 Office Sector Contractors and CM Firms
29. Office — Buildings/Core+Shell
• Top 140 Office Building Core+Shell Architecture + AE Firms
• Top 80 Office Building Core+Shell Engineering + EA Firms
• Top 100 Office Building Core+Shell Contractors and CM Firms
30. Office — Workplace/Interior Fitouts
• Top 160 Workplace/Interior Fitout Architecture and AE Firms
• Top 50 Workplace/Interior Fitout Engineering and EA Firms
• Top 80 Workplace/Interior Fitout Contractors and CM Firms
31. Parking Structures
• Top 60 Parking Structure Architecture and AE Firms
• Top 45 Parking Structure Engineering and EA Firms
• Top 55 Parking Structure Contractors + CM Firms
32. Public Safety/Justice Facilities
• Top 90 Justice Facility/Public Safety Sector Architecture and AE Firms
• Top 60 Justice Facility/Public Safety Sector Engineering and EA Firms
• Top 50 Justice Facility/Public Safety Contractors + CM Firms
33. Reconstruction Work
• Top 200 Reconstruction Sector Architecture and AE Firms
• Top 70 Reconstruction Sector Engineering and EA Firms
• Top 140 Reconstruction Sector Contractors + CM Firms
34. Religious Structures/Places of Worship
• Top 80 Religious Facility Architecture and AE Firms
• Top 50 Religious Facility Engineering and EA Firms
• Top 40 Religious Facility Contractors + CM Firms
35. Retail — All Retail Buildings Work
• Top 140 Retail Sector Architecture and AE Firms — All Retail Buildings Work
• Top 75 Retail Sector Engineering and EA Firms — All Retail Buildings Work
• Top 80 Retail Sector Contractors and CM Firms — All Retail Buildings Work
36. Retail — Entertainment Centers, Cineplexes, Theme Parks
• Top 30 Retail Architecture and AE Firms — Entertainment Centers, Cineplexes, Theme Parks
• Top 40 Retail Engineering and EA Firms — Entertainment Centers, Cineplexes, Theme Parks
• Top 40 Retail Contractors and CM Firms — Entertainment Centers, Cineplexes, Theme Parks
37. Retail — Malls, Big Box Stores, Strip Centers
• Top 90 Retail Architecture and AE Firms - Malls, Big Box Stores, Strip Centers
• Top 60 Retail Engineering and EA Firms — Malls, Big Box Stores, Strip Centers
• Top 60 Retail Contractors and CM Firms — Malls, Big Box Stores, Strip Centers
38. Retail — Restaurants
• Top 90 Retail Architecture and AE Firms — Restaurants
• Top 40 Retail Engineering and EA Firms — Restaurants
• Top 40 Retail Contractors and CM Firms — Restaurants
39. Science & Technology (S+T) Facilities - All S+T Buildings Work
• Top 100 Science + Technology Facility Architecture and AE Firms
• Top 70 Science + Technology Facility Engineering and EA Firms
• Top of 80 Science + Technology Facility Contractors and CM Firms
40. Science & Technology — Laboratories
• Top 100 Laboratory Facility Architecture and AE Firms
• Top 60 Laboratory Facility Engineering and EA Firms
• Top 55 Laboratory Facility Contractors and CM Firms
41. Schools — PK-12, Public, Private, Charter, Military
• Top 170 K-12 School Sector Architecture and AE Firms
• Top 80 K-12 School Sector Engineering and EA Firms
• Top 100 K-12 School Sector Contractors and CM Firms
42. Sports Facilities/Stadiums/Recreation Facilities
• Top 130 Sports Facility Architecture and AE Firms
• Top 70 Sports Facility Engineering and EA Firms
• Top 70 Sports Facility Contractors and CM Firms
43. Telecommunications Buildings
• Top 10 Telecommunications Facility Sector Architecture and AE Firms
• Top 25 Telecommunications Facility Sector Engineering and EA Firms
• Top 10 Telecommunications Facilities Contractors + CM Firms
44. Transit Facilities — Bus/Rail Terminals and Stations
• Top 40 Transit Facility Architecture and AE Firms
• Top 40 Transit Facility Engineering and EA Firms
• Top 25 Transit Facilities Contractors + CM Firms
45. University / College Facilities
• Top 170 University Sector Architecture and AE Firms
• Top 80 University Sector Engineering and EA Firms
• Top 100 University Sector Contractors and CM Firms
PAST GIANTS 400 REPORTS
2022 Giants 400 Report
2021 Giants 400 Report
2020 Giants 400 Report
2019 Giants 300 Report
2018 Giants 300 Report
2017 Giants 300 Report