![Thomas Brisbin](data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="%231b1b1b" class="bi bi-person-fill" viewBox="0 0 16 16"><path d="M3 14s-1 0-1-1 1-4 6-4 6 3 6 4-1 1-1 1zm5-6a3 3 0 1 0 0-6 3 3 0 0 0 0 6"/></svg>)
Thomas Brisbin
Chairman at
WILLDAN GROUP, INC.
Net worth: 7 M $ as of 31/07/2026
Profile
Thomas D.
Brisbin was the founder of Tetra Tech EM, Inc., established in 1978, where the title held was President & Director from 1978 to 1995.
Current jobs include Chairman at Willdan Group, Inc. since 2023, Chairman at Willdan Energy Solutions, Inc., and Director at Willdan Financial Services, all ongoing roles.
Former jobs include Chief Executive Officer & Director at Willdan Homeland Solutions, Inc., Chief Operating Officer & Executive Vice President at Tetra Tech, Inc. from 1999 to 2004, Vice President at AECOM from 2004 to 2007, and Research Associate at Argonne National Laboratory.
Education includes a doctorate from Illinois Institute of Technology and an undergraduate degree from Northern Illinois University.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
WILLDAN GROUP, INC. 0.64% | 17/06/2026 | 96,687 ( 0.64% ) | 7 M $ | 31/07/2026 |
Thomas Brisbin active positions
| Companies | Position | Start |
|---|---|---|
| WILLDAN GROUP, INC. | Chairman | 02/11/2016 |
Willdan Energy Solutions, Inc.
 Willdan Energy Solutions, Inc. Engineering & ConstructionIndustrial Services Provides energy efficiency, water conservation, and renewable energy strategies | Chairman | - |
Willdan Financial Services, Inc.
 Willdan Financial Services, Inc. Miscellaneous Commercial ServicesCommercial Services Provides financial, economic and strategic planning advisory services | Director/Board Member | - |
Former positions of Thomas Brisbin
| Companies | Position | End |
|---|---|---|
| AECOM | Corporate Officer/Principal | 01/01/2007 |
| TETRA TECH, INC. | Chief Operating Officer | 01/01/2004 |
Willdan Homeland Solutions, Inc.
 Willdan Homeland Solutions, Inc. Miscellaneous Commercial ServicesCommercial Services Provides consulting services for national preparedness, homeland security, public safety, and emergency response operations | Chief Executive Officer | - |
Tetra Tech EM, Inc.
 Tetra Tech EM, Inc. Engineering & ConstructionIndustrial Services Provides environmental consulting | Founder | - |
Argonne National Laboratory
 Argonne National Laboratory Miscellaneous Commercial ServicesCommercial Services Provides research and technology services | Corporate Officer/Principal | - |
Training of Thomas Brisbin
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
56
1st degree connections
10
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 10 |
|---|---|
Tetra Tech, Inc.
 Tetra Tech, Inc. Engineering & ConstructionIndustrial Services Provides consulting and engineering services | Industrial Services |
Willdan Group, Inc.
 Willdan Group, Inc. Miscellaneous Commercial ServicesCommercial Services Provides energy and engineering consulting services | Commercial Services |
AECOM
 AECOM Engineering & ConstructionIndustrial Services Engages in planning, consulting, architectural & engineering design, construction and program management services | Industrial Services |
Illinois Institute of Technology
 Illinois Institute of Technology Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Tetra Tech EM, Inc.
Tetra Tech EM, Inc. Engineering & ConstructionIndustrial Services Provides environmental consulting | Industrial Services |
Northern Illinois University
 Northern Illinois University Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Argonne National Laboratory
Argonne National Laboratory Miscellaneous Commercial ServicesCommercial Services Provides research and technology services | Commercial Services |
Willdan Energy Solutions, Inc.
Willdan Energy Solutions, Inc. Engineering & ConstructionIndustrial Services Provides energy efficiency, water conservation, and renewable energy strategies | Industrial Services |
Willdan Financial Services, Inc.
Willdan Financial Services, Inc. Miscellaneous Commercial ServicesCommercial Services Provides financial, economic and strategic planning advisory services | Commercial Services |
Willdan Homeland Solutions, Inc.
Willdan Homeland Solutions, Inc. Miscellaneous Commercial ServicesCommercial Services Provides consulting services for national preparedness, homeland security, public safety, and emergency response operations | Commercial Services |
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