Jacobs, Fluor, SSOE, Tetra Tech, and Affiliated Engineers head BD+C's ranking of the nation's largest science and technology (S+T) facility engineering and engineering/architecture (EA) firms for 2023, as reported in Building Design+Construction's 2023 Giants 400 Report. Note: This ranking factors revenue from all science and technology (S+T) buildings work, including laboratories, research buildings, technology/innovation buildings, pharmaceutical production facilities, and semiconductor production facilities.
| Top 70 Science + Technology Facility Engineering Firms for 2023 | ||
| FIRM | 2022 REVENUE | |
| 1 | Jacobs | $1,736,200,000 |
| 2 | Fluor | $171,982,522 |
| 3 | SSOE | $81,768,181 |
| 4 | Tetra Tech High Performance Buildings Group | $70,339,644 |
| 5 | Affiliated Engineers | $68,918,572 |
| 6 | Burns & McDonnell | $44,319,142 |
| 7 | CRB Group | $28,907,789 |
| 8 | WSP | $28,665,654 |
| 9 | Salas O'Brien | $28,537,000 |
| 10 | Vanderweil Engineers | $27,600,300 |
| 11 | Alfa Tech Consulting Engineers | $25,200,000 |
| 12 | BR+A | $20,000,000 |
| 13 | IMEG | $17,775,400 |
| 14 | EXP | $15,662,000 |
| 15 | Jaros, Baum & Bolles | $15,153,520 |
| 16 | Arup | $14,078,201 |
| 17 | KPFF Consulting Engineers | $13,822,384 |
| 18 | BKF Engineers | $12,407,253 |
| 19 | RMF Engineering | $12,000,000 |
| 20 | AKF | $9,001,223 |
| 21 | Thornton Tomasetti | $8,875,263 |
| 22 | Syska Hennessy Group | $8,746,133 |
| 23 | CDM Smith | $7,630,836 |
| 24 | NV5 Global | $6,569,150 |
| 25 | Dunham Associates | $5,590,000 |
| 26 | Bala Consulting Engineers | $5,060,000 |
| 27 | Langan | $5,000,000 |
| 28 | PS&S | $4,445,339 |
| 29 | Newcomb & Boyd | $3,548,230 |
| 30 | Bridgers & Paxton Consulting Engineers | $3,337,060 |
| 31 | M/E Engineering | $3,050,000 |
| 32 | Bennett & Pless | $2,695,325 |
| 33 | Dewberry | $2,515,269 |
| 34 | Highland Associates | $2,400,000 |
| 35 | Mazzetti | $2,258,452 |
| 36 | Martin/Martin | $2,179,778 |
| 37 | DH Engineering | $2,044,133 |
| 38 | McKinstry | $2,000,000 |
| -- | Hixson Architecture, Engineering, Interiors | $2,000,000 |
| 40 | Henderson Engineers | $1,860,167 |
| 41 | CMTA | $1,856,558 |
| 42 | I.C. Thomasson Associates | $1,750,000 |
| 43 | DeSimone Consulting Engineering | $1,498,459 |
| 44 | Farnsworth Group | $1,406,507 |
| 45 | Heapy | $1,366,403 |
| 46 | Walter P Moore | $1,235,929 |
| 47 | P2S | $943,851 |
| 48 | Smith Seckman Reid (SSR) | $757,717 |
| 49 | Specialized Engineering Solutions | $750,000 |
| 50 | Interface Engineering | $746,941 |
| 51 | ME Engineers | $700,000 |
| 52 | Henderson Building Solutions | $686,779 |
| 53 | Osborn Engineering | $650,000 |
| 54 | Arora Engineers | $631,894 |
| 55 | SSC Engineering | $627,000 |
| 56 | Teecom | $505,190 |
| 57 | Wiss, Janney, Elstner Associates | $500,000 |
| 58 | ESD (now Stantec Consulting Services, Inc.) | $452,424 |
| 59 | Karpinski Engineering | $400,000 |
| 60 | KCI Technologies | $389,791 |
| 61 | Kohrs Lonnemann Heil Engineers (KLH) | $353,866 |
| 62 | TLC Engineering Solutions | $304,243 |
| 63 | JQ Engineering | $288,539 |
| 64 | PCS Structural Solutions | $269,217 |
| 65 | Kohler Ronan | $228,817 |
| 66 | PBS Engineers | $225,000 |
| 67 | Wallace Design Collective | $200,000 |
| 68 | Wick Fisher White | $151,749 |
| 69 | DLZ Corporation | $50,135 |
| 70 | EVstudio | $50,000 |
| 71 | H.F. Lenz | $22,680 |
| 72 | JP Harvey Engineering Solutions | $20,100 |
| 73 | Magnusson Klemencic Associates | $15,515 |
| 74 | French & Parrello Associates | $11,225 |
| 75 | Davis, Bowen & Friedel | $3,311 |
Source: 2023 Giants 400 Report
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