HDR, Jacobs, and Turner head BD+C's rankings of the nation's largest science and technology (S+T) facilities sector architecture, engineering, and construction firms, as reported in the 2020 Giants 400 Report.
| Top 45 Science & Technology Facilities Sector Architecture and AE Firms for 2020 | ||
| FIRM | 2019 REVENUE | |
| 1 | HDR | $49,784,918 |
| 2 | SmithGroup | $42,644,554 |
| 3 | Perkins and Will | $31,508,770 |
| 4 | HOK | $29,259,000 |
| 5 | Page | $22,500,000 |
| 6 | Skidmore, Owings & Merrill | $17,597,921 |
| 7 | SGA | $16,514,202 |
| 8 | TRIA | $13,327,250 |
| 9 | CannonDesign | $12,000,000 |
| 10 | EXP | $11,295,975 |
| 11 | EwingCole | $10,800,000 |
| 12 | BSA LifeStructures | $10,583,465 |
| 13 | Perkins Eastman | $10,497,913 |
| 14 | DGA | $9,140,372 |
| 15 | Clark Enersen Partners, The | $8,844,964 |
| 16 | Ayers Saint Gross | $8,732,874 |
| 17 | CO Architects | $5,625,400 |
| 18 | Flad Architects | $5,391,000 |
| 19 | HGA | $5,164,162 |
| 20 | LMN Architects | $5,000,000 |
| 21 | Huntsman Architectural Group | $4,897,443 |
| 22 | TreanorHL | $4,600,000 |
| 23 | BWBR | $4,544,000 |
| 24 | Hastings+Chivetta Architects | $3,568,754 |
| 25 | NBBJ | $3,200,000 |
| 26 | Architectural Resources Cambridge (ARC) | $2,746,567 |
| 27 | Clark Nexsen | $2,700,000 |
| 28 | MBH Architects | $2,510,000 |
| 29 | HLW | $2,500,000 |
| 30 | Gensler | $2,211,090 |
| 31 | HED | $2,000,000 |
| 32 | KGD Architecture | $1,958,583 |
| 33 | Alliiance | $1,782,508 |
| 34 | Ballinger | $1,741,967 |
| 35 | Ware Malcomb | $1,703,756 |
| 36 | Bergmann | $1,500,000 |
| 37 | RSP Architects | $893,000 |
| 38 | Margulies Perruzzi | $889,855 |
| 39 | Kirksey Architecture | $830,711 |
| 40 | Mithun | $771,275 |
| 41 | Urbahn Architects | $677,662 |
| 42 | YGH Architecture | $524,640 |
| 43 | Taylor Design | $509,000 |
| 44 | CPL | $191,190 |
| 45 | AHL | $149,813 |
| 46 | Leo A Daly | $58,491 |
| 47 | Ratio Architects | $4,359 |
| Top 30 Science & Technology Facilities Sector Engineering and EA Firms for 2020 | ||
| FIRM | 2019 REVENUE | |
| 1 | Jacobs | $155,000,000 |
| 2 | Jensen Hughes | $10,983,620 |
| 3 | BRPH Architects Engineers | $7,163,817 |
| 4 | RMF Engineering | $7,000,000 |
| 5 | Vanderweil Engineers | $6,300,800 |
| 6 | KPFF Consulting Engineers | $6,279,000 |
| 7 | STV | $3,507,364 |
| 8 | Dewberry | $3,474,828 |
| 9 | Newcomb & Boyd | $3,317,035 |
| 10 | PS&S | $3,228,000 |
| 11 | Thornton Tomasetti | $3,175,392 |
| 12 | IMEG Corp. | $2,896,698 |
| 13 | RMH Group, The | $2,170,155 |
| 14 | CDM Smith | $1,903,525 |
| 15 | Syska Hennessy Group | $1,780,453 |
| 16 | M/E Engineering | $1,436,365 |
| 17 | Jaros, Baum & Bolles | $1,398,116 |
| 18 | NV5 Global | $1,326,000 |
| 19 | Arup | $1,208,763 |
| 20 | Mazzetti | $1,102,926 |
| 21 | Paradigm Structural Engineers | $1,076,088 |
| 22 | AKF Group | $860,000 |
| 23 | Bridgers & Paxton Consulting Engineers | $800,282 |
| 24 | SSOE Group | $773,839 |
| 25 | Peter Basso Associates | $300,000 |
| 26 | Dunham Associates | $250,000 |
| 27 | Osborn Engineering | $225,000 |
| 28 | Arora Engineers | $208,133 |
| 29 | Highland Associates | $200,000 |
| 30 | KLH Engineers | $171,529 |
| 31 | Milhouse Engineering and Construction | $96,508 |
| 32 | Wallace Engineering | $50,000 |
| 33 | Walter P Moore | $24,597 |
| Top 25 Science & Technology Facilities Sector Contractors and CM Firms for 2020 | ||
| FIRM | 2019 REVENUE | |
| 1 | Turner Construction Company | $355,370,930 |
| 2 | DPR Construction | $328,591,000 |
| 3 | Whiting-Turner Contracting Company, The | $267,633,449 |
| 4 | Gilbane Building Company | $181,237,000 |
| 5 | Jacobs | $88,169,000 |
| 6 | McCownGordon Construction, LLC | $82,032,154 |
| 7 | Skanska USA | $60,157,913 |
| 8 | Messer Construction | $55,609,097 |
| 9 | Columbia | $54,000,000 |
| 10 | McCarthy Holdings | $52,879,764 |
| 11 | LeChase Construction Services | $51,177,952 |
| 12 | Swinerton | $40,000,000 |
| 13 | Barton Malow | $34,369,566 |
| 14 | BRPH Architects Engineers | $11,989,183 |
| 15 | Andersen Construction | $6,400,000 |
| 16 | Kraus-Anderson Construction | $6,000,000 |
| 17 | Donohoe Construction | $5,186,812 |
| 18 | Cumming | $5,015,750 |
| 19 | Hagerman Group, The | $5,000,000 |
| 20 | Russell Construction | $5,000,000 |
| 21 | STV | $4,308,536 |
| 22 | Fortis Construction | $3,886,382 |
| 23 | Robins & Morton | $2,965,922 |
| 24 | Hill International | $415,243 |
| 25 | W.E. O'Neil Construction | $234,804 |
