ENR Mountain States & Southwest Top Design Firms by Market Sector 2026
June 2026
The ENR Mountain States & Southwest Top Design Firms list ranks the largest U.S.-based designs firms, both publicly and privately held, based on design-specific revenue.
More detailed information on the Top Design Firms:
View Complete List of Main Rankings
Related Article:
Population Growth, Climate Demands Drive Mountain States & Southwest Projects in 2026
Click below for earlier editions:
2025 |
Click here for archived ENR Mountain States, Intermountain and Southwest top lists.
| Page 1 | Page 2 |
ENR Mountain States & Southwest Top Design Firms by Market Sector 2026
| RANK | FIRM | $ MIL. |
|---|---|---|
| 1 | Kimley-Horn | 31.76 |
| 2 | Terracon | 11.00 |
| 3 | Stantec | 8.47 |
| 4 | Atwell LLC | 7.99 |
| 5 | AtkinsRéalis | 5.74 |
| 6 | Cushing Terrell | 5.25 |
| 7 | Bowman Consulting Group Ltd. (Bowman) | 3.55 |
| 8 | PM Design Inc. | 3.31 |
| 9 | Martin/Martin Inc. | 2.84 |
| 10 | IMEG Corp. | 2.50 |
| RANK | FIRM | $ MIL. |
|---|---|---|
| 1 | Harris | 102.18 |
| 2 | Farnsworth Group Inc. | 20.34 |
| 3 | Salas O'Brien | 6.53 |
| 4 | Haskell | 5.88 |
| 5 | Merrick & Co. | 5.30 |
| 6 | Arcadis North America | 4.39 |
| 7 | IMEG Corp. | 3.60 |
| 8 | Kleinfelder Inc. | 3.42 |
| 9 | Colliers Engineering & Design | 1.70 |
| 10 | Stantec | 1.68 |
| RANK | FIRM | $ MIL. |
|---|---|---|
| 1 | HNTB Corp. | 23.65 |
| 2 | Kimley-Horn | 9.14 |
| 3 | Walter P Moore | 6.56 |
| 4 | Martin/Martin Inc. | 4.76 |
| 5 | Terracon | 4.00 |
| 6 | ME Engineers | 2.82 |
| 7 | Steelman Partners LLP | 2.00 |
| 8 | Cushing Terrell | 1.86 |
| 9 | AECOM | 1.79 |
| 10 | Atwell LLC | 1.73 |
| RANK | FIRM | $ MIL. |
|---|---|---|
| 1 | Corgan | 64.22 |
| 2 | WSP USA | 43.69 |
| 3 | Kimley-Horn | 37.81 |
| 4 | Burns & McDonnell | 33.83 |
| 5 | HDR | 24.09 |
| 6 | Terracon | 14.80 |
| 7 | Salas O'Brien | 9.45 |
| 8 | Stantec | 6.70 |
| 9 | Affiliated Engineers Inc. (AEI) | 5.52 |
| 10 | Woolpert | 4.90 |
| RANK | FIRM | $ MIL. |
|---|---|---|
| 1 | AECOM | 70.42 |
| 2 | Arcadis North America | 59.70 |
| 3 | WSP USA | 30.93 |
| 4 | Terracon | 24.60 |
| 5 | Woodard & Curran | 18.76 |
| 6 | Burns & McDonnell | 17.47 |
| 7 | HDR | 1.23 |
| 8 | Stantec | 1.07 |
| 9 | Ninyo & Moore, A SOCOTEC Company | 0.75 |
| 10 | Sunrise Engineering | 0.45 |
| RANK | FIRM | $ MIL. |
|---|---|---|
| 1 | HDR | 153.60 |
| 2 | Kimley-Horn | 138.86 |
| 3 | WSP USA | 121.54 |
| 4 | HNTB Corp. | 116.71 |
| 5 | AECOM | 101.86 |
| 6 | David Evans Enterprises Inc. | 52.30 |
| 7 | Stantec | 51.97 |
| 8 | RS&H Inc. | 45.37 |
| 9 | AtkinsRéalis | 39.46 |
| 10 | Benesch | 36.85 |
| RANK | FIRM | $ MIL. |
|---|---|---|
| 1 | WSP USA | 31.40 |
| 2 | Affiliated Engineers Inc. (AEI) | 7.26 |
| 3 | Farnsworth Group Inc. | 6.90 |
| 4 | Salas O'Brien | 5.86 |
| 5 | AtkinsRéalis | 5.00 |
| 6 | Walter P Moore | 4.87 |
| 7 | IMEG Corp. | 4.60 |
| 8 | Terracon | 4.30 |
| 9 | Ninyo & Moore, A SOCOTEC Company | 4.10 |
| 10 | Haskell | 4.03 |
| RANK | FIRM | $ MIL. |
|---|---|---|
| 1 | AECOM | 121.26 |
| 2 | HDR | 64.87 |
| 3 | Stantec | 57.78 |
| 4 | Arcadis North America | 43.89 |
| 5 | Merrick & Co. | 21.80 |
| 6 | Sunrise Engineering | 17.94 |
| 7 | Kimley-Horn | 16.92 |
| 8 | Mott MacDonald | 15.60 |
| 9 | WSP USA | 14.84 |
| 10 | Burns & McDonnell | 14.55 |
| RANK | FIRM | $ MIL. |
|---|---|---|
| 1 | WSP USA | 69.41 |
| 2 | Stantec | 55.87 |
| 3 | Westwood Professional Services | 40.29 |
| 4 | Colliers Engineering & Design | 32.81 |
| 5 | Geo-Logic Associates Inc. | 21.74 |
| 6 | Bowman Consulting Group Ltd. (Bowman) | 17.64 |
| 7 | Wood Rodgers Inc. | 15.95 |
| 8 | SWCA Environmental Consultants | 15.83 |
| 9 | Atwell LLC | 14.84 |
| 10 | Woolpert | 9.03 |
| RANK | FIRM | $ MIL. |
|---|---|---|
| 1 | WSP USA | 153.00 |
| 2 | Merrick & Co. | 88.20 |
| 3 | Stantec | 42.86 |
| 4 | Salas O'Brien | 37.52 |
| 5 | Affiliated Engineers Inc. (AEI) | 25.54 |
| 6 | Bridgers & Paxton Consulting Engineers Inc. | 24.54 |
| 7 | SmithGroup | 23.08 |
| 8 | AECOM | 16.90 |
| 9 | ME Engineers | 16.58 |
| 10 | Cushing Terrell | 15.20 |
| RANK | FIRM | $ MIL. |
|---|---|---|
| 1 | Corgan | 68.17 |
| 2 | FFKR Architects | 47.67 |
| 3 | DLR Group | 40.00 |
| 4 | SmithGroup | 38.25 |
| 5 | Davis Partnership Architects | 37.84 |
| 6 | Stantec | 36.88 |
| 7 | HDR | 28.63 |
| 8 | ZGF | 27.24 |
| 9 | Cushing Terrell | 25.54 |
| 10 | Treanor | 18.38 |
| RANK | FIRM | $ MIL. |
|---|---|---|
| 1 | WSP USA | 153.40 |
| 2 | HDR | 140.35 |
| 3 | AECOM | 63.43 |
| 4 | Martin/Martin Inc. | 28.72 |
| 5 | Kimley-Horn | 12.23 |
| 6 | Walter P Moore | 12.14 |
| 7 | Reaveley Engineers | 11.42 |
| 8 | Merrick & Co. | 11.40 |
| 9 | Sunrise Engineering | 10.05 |
| 10 | Salas O'Brien | 6.91 |
| RANK | FIRM | $ MIL. |
|---|---|---|
| 1 | Kimley-Horn | 372.59 |
| 2 | WSP USA | 281.22 |
| 3 | AECOM | 185.72 |
| 4 | Terracon | 159.90 |
| 5 | HDR | 85.80 |
| 6 | Stantec | 81.47 |
| 7 | AtkinsRéalis | 67.74 |
| 8 | Wilson & Co., Engineers & Architects | 62.18 |
| 9 | Sunrise Engineering | 55.52 |
| 10 | Westwood Professional Services | 50.59 |
| RANK | FIRM | $ MIL. |
|---|---|---|
| 1 | WSP USA | 109.46 |
| 2 | SmithGroup | 55.81 |
| 3 | Kimley-Horn | 49.07 |
| 4 | AECOM | 34.03 |
| 5 | Davis Partnership Architects | 29.58 |
| 6 | HDR | 29.06 |
| 7 | Stantec | 22.53 |
| 8 | Corgan | 15.64 |
| 9 | ZGF | 13.30 |
| 10 | Haskell | 10.30 |
| RANK | FIRM | $ MIL. |
|---|---|---|
| 1 | HDR | 120.93 |
| 2 | SWCA Environmental Consultants | 118.35 |
| 3 | Arcadis North America | 105.62 |
| 4 | Stantec | 80.75 |
| 5 | AECOM | 59.49 |
| 6 | Ninyo & Moore, A SOCOTEC Company | 49.32 |
| 7 | CTL Thompson Inc. | 36.66 |
| 8 | Kleinfelder Inc. | 31.50 |
| 9 | Woodard & Curran | 20.70 |
| 10 | Langan | 17.28 |
| RANK | FIRM | $ MIL. |
|---|---|---|
| 1 | WSP USA | 294.91 |
| 2 | Burns & McDonnell | 184.58 |
| 3 | Electrical Consultants Inc. | 99.90 |
| 4 | SWCA Environmental Consultants | 66.29 |
| 5 | HDR | 46.84 |
| 6 | Stantec | 46.45 |
| 7 | Kimley-Horn | 33.42 |
| 8 | Terracon | 28.50 |
| 9 | Westwood Professional Services | 27.66 |
| 10 | Kleinfelder Inc. | 13.13 |