A roster of architecture, engineering and design firms, ranked by number of licensed professionals in Oregon and Southwest Washington.
1 David Evans Enterprises
Registered Professionals:129
OR and SW Wash Employees: 536
Total Offices: 32Year Established: 1976
2 ZGF Architects
Registered Professionals:126
OR and SW Wash Employees: 257
Total Offices: 6Year Established: 1942
3 Otak
Registered Professionals:110
OR and SW Wash Employees: 218
Total Offices: 7Year Established: 1981
4 Shannon & Wilson
Registered Professionals:106
OR and SW Wash Employees: 35
Total Offices: 13Year Established: 1954
5 AKS Engineering & Forestry
Registered Professionals:88
OR and SW Wash Employees: 250
Total Offices: 4Year Established: 1996
6 SERA Architects
Registered Professionals:56
OR and SW Wash Employees: 152
Total Offices: 2Year Established: 1968
7 GBD Architects
Registered Professionals:54
OR and SW Wash Employees: 88
Total Offices: 1Year Established: 1969
8 AECOM
Registered Professionals:50
OR and SW Wash Employees: 126
Total Offices: 852Year Established: 1990
9 Harper Houf Peterson Righellis
Registered Professionals:42
OR and SW Wash Employees: 100
Total Offices: 4Year Established: 1990
10 Hennebery Eddy Architects
Registered Professionals:40
OR and SW Wash Employees: 59
Total Offices: 1Year Established: 1992
11 Mahlum
Registered Professionals:38
OR and SW Wash Employees: 81
Total Offices: 2Year Established: 1938
12 TVA Architects
Registered Professionals:33
OR and SW Wash Employees: 19
Total Offices: 1Year Established: 1984
13 Maul Foster & Alongi
Registered Professionals:32
OR and SW Wash Employees: 98
Total Offices: 8Year Established: 1996
14 FFA Architecture and Interiors
Registered Professionals:31
OR and SW Wash Employees: 18
Total Offices: 1Year Established: 1956
15 Opsis Architecture
Registered Professionals:30
OR and SW Wash Employees: 50
Total Offices: 1Year Established: 1999
16 Hacker
Registered Professionals:28
OR and SW Wash Employees: 64
Total Offices: 1Year Established: 1983
17 PACE Engineers
Registered Professionals:23
OR and SW Wash Employees: 30
Total Offices: 4Year Established: 1992
18 Westlake Consultants
Registered Professionals:17
OR and SW Wash Employees: 55
Total Offices: 1Year Established: 1983
19 3J Consulting
Registered Professionals:15
OR and SW Wash Employees: 33
Total Offices: 1Year Established: 2009
20 Kramer Gehlen and Associates
Registered Professionals:14
OR and SW Wash Employees: 19
Total Offices: 1Year Established: 1969
21 Burns & McDonnell
Registered Professionals:13
OR and SW Wash Employees: 41
Total Offices: 55Year Established: 1898
TIE 22 Smith Monroe Gray Engineers
Registered Professionals:11
OR and SW Wash Employees: 26
Total Offices: 2Year Established: 1971
TIE 22 Waterleaf Architecture, Interiors & Planning
Registered Professionals:11
OR and SW Wash Employees: 20
Total Offices: 1Year Established: 1952
24 Emerick Architects
Registered Professionals:10
OR and SW Wash Employees: 15
Total Offices: 1Year Established: 1999
TIE 25 BBT Architects
Registered Professionals:8
OR and SW Wash Employees: 16
Total Offices: 1Year Established: 1976
TIE 25 Elcon Associates
Registered Professionals:8
OR and SW Wash Employees: 18
Total Offices: 3Year Established: 1975
TIE 27 BBL Architects
Registered Professionals:6
OR and SW Wash Employees: 16
Total Offices: 1Year Established: 1976
TIE 27 OH Planning & Design
Registered Professionals:6
OR and SW Wash Employees: 28
Total Offices: 1Year Established: 2004
TIE 29 Fluent Engineering
Registered Professionals:5
OR and SW Wash Employees: 12
Total Offices: 3Year Established: 2008
TIE 29 Steele Associates Architects
Registered Professionals:5
OR and SW Wash Employees: 20
Total Offices: 1Year Established: 1996
31 ORW Architecture
Registered Professionals:4
OR and SW Wash Employees: 12
Total Offices: 1Year Established: 1968
TIE 32 Reyes Engineering
Registered Professionals:2
OR and SW Wash Employees: 16
Total Offices: 4Year Established: 1999
TIE 32 The Abell Architectural Group
Registered Professionals:2
OR and SW Wash Employees: 4
Total Offices: 1Year Established: 1982
Disclaimer: This list was compiled based on responses to a survey. Firms are not included if they did not respond to the survey.