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
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