10 Tetra Tech engineering leaders
Viraj deSilva, Vice President and National Practice Leader: Emerging Contaminants at Tetra Tech, is one of ten Tetra Tech engineering leaders listed here, alongside people who hold vice president, practice leader and engineering director roles at the company. A reader can learn how engineering leaders work at Tetra Tech from people who have held the role.
Professionals to explore
Carol L. Hufnagel
LinkedInExperience: National Wet Weather Practice Leader · Tetra Tech
Carol L. Hufnagel has been National Wet Weather Practice Leader at Tetra Tech since June 1984, based in Ann Arbor, Michigan, and the profile also lists a Vice President role at Tetra Tech from the same date. The profile lists specialties in planning and assessment of combined and sanitary sewer systems and design of wet weather control facilities.
Christopher Calnan
LinkedInExperience: Vice President · Tetra Tech
Christopher Calnan has been Vice President at Tetra Tech since September 1997, based in Greater Boston, and the profile says: "Mr. Calnan is a Vice President and Director of Transportation for Tetra Tech’s Infrastructure Northeast operations." Christopher Calnan was Civil Design Manager at Lochner from 1993 to 1997.
Geoff Baldwin
LinkedInExperience: Vice President Water and Resilient Infrastructure · Tetra Tech
Geoff Baldwin has been Vice President Water and Resilient Infrastructure at Tetra Tech since April 2021, based in the Greater Seattle Area. Geoff Baldwin was Vice President - Client Portfolio Leader at CDM Smith from 2007 to 2021 and Associate at Arcadis from 1991 to 2005, and the profile describes an engineer and consultant for major water and wastewater programs.
Guy Cinq-Mars
LinkedInExperience: Vice President Engineering / Mining and Minerals Initiative Manager · Tetra Tech
Guy Cinq-Mars has been Vice President Engineering / Mining and Minerals Initiative Manager at Tetra Tech since April 2026, based in the Salt Lake City area, and the profile also lists Vice President Engineering from 2021. Guy Cinq-Mars was Regional Manager at Tetra Tech from 2011 to 2015 and Mechanical Engineering Department Manager at BPR-Bechtel from 2006 to 2011.
Jason McLindon
LinkedInExperience: Vice President, Transmission & Distribution, and Renewables · Tetra Tech
Jason McLindon has been Vice President, Transmission & Distribution, and Renewables at Tetra Tech since October 2023. At Tetra Tech, Jason McLindon was Director of Projects from 2019 to 2023, Project Control Manager and Project Manager from 2013 to 2019 and Lead Scheduler, Cost Controller and Project Manager from 2010 to 2013.
Patrick Korner
LinkedInExperience: Vice President, Geotechnical Engineering · Tetra Tech
Patrick Korner has been Vice President, Geotechnical Engineering at Tetra Tech since September 2026, based in Coquitlam, British Columbia, and the profile also lists Senior Manager, Geotechnical Engineering, Western Canada from 2023. Patrick Korner was Division Manager at Tetra Tech EBA from 2013 to 2023 and Team Lead - Geotechnical Engineering at EBA Engineering Consultants Ltd.
Philip Spalding
LinkedInExperience: Vice President, High Performance Buildings Group · Tetra Tech
Philip Spalding has been Vice President, High Performance Buildings Group at Tetra Tech since January 2014, based in Detroit, Michigan, with a profile headline of Vice President Tetra Tech High Performance Buildings Group. Philip Spalding was Senior Vice President at NTH Consultants, Ltd. from 1994 to 2014.
Richard J. Feeney
LinkedInExperience: Vice President, Engineering and National Engineering Discipline Lead · Tetra Tech Inc.
Richard J. Feeney has been Vice President, Engineering and National Engineering Discipline Lead at Tetra Tech since May 1988, based in Morris Plains, New Jersey. Richard J. Feeney was Manager of Engineering at WasteChem Corporation from 1985 to 1988 and Project Engineer at M. W. Kellogg Company (now KBR Incorporated) from 1975 to 1985.
Stephen Delhomme
LinkedInExperience: Vice President, Engineering Director · Tetra Tech
Stephen Delhomme has been Vice President, Engineering Director at Tetra Tech since January 2001, based in Missouri City, Texas. Stephen Delhomme was Engineering Manager at Entrix, Inc. from 1997 to 2001, Corporate Engineering Director at US Ecology Inc., a Republic Services Company from 1993 to 1997 and Houston Engineering Manager at Harding Lawson Associates.
Viraj deSilva
LinkedInExperience: Vice President and National Practice Leader: Emerging Contaminants · Tetra Tech
Viraj deSilva has been Vice President and National Practice Leader: Emerging Contaminants at Tetra Tech since June 2026, based in the Greater Tampa Bay Area. Viraj deSilva was Sr. Treatment Process Leader at Freese and Nichols from 2021 to 2026, and the profile describes expertise in water and wastewater treatment process design, biosolids management and PFAS treatment.
Choose the right perspective
For questions about a technical area, start with the leader of that practice or discipline, such as emerging contaminants, wet weather, geotechnical, power or transportation; for questions about running an engineering group or office, start with the engineering directors and regional leaders. Check the dates to see how recently each person moved into the role.
Questions to take into the conversation
- 01What did you focus on first when you took on your current practice or discipline leadership role?
- 02How do you keep engineering standards consistent across the offices and teams in your practice?
- 03What has your own experience taught you about building a new technical practice?
Reaching Tetra Tech engineering leaders
How can I contact one of these Tetra Tech engineering leaders?
Pick one of the 10 people on this page and choose "Book a paid call", or describe your project to find others. You offer a fee for a 15-minute call or a written answer, Instant Expert finds the person's work email and sends the invitation, and they decide whether to accept. The list covers 2 companies: Tetra Tech and Tetra Tech Inc., based on profile data retrieved on October 23, 2026. Being listed here doesn't mean someone has agreed to take calls.
How much does it cost to reach Tetra Tech engineering leaders?
You choose the offer, starting at $5 per person. The offer is what the person receives, and Instant Expert's fee is added on top, so a $100 offer costs you $125. The fee is 20% of what you pay. You're charged only when the person books the call or sends the answer.
What if they don't reply?
You pay nothing. Instant Expert sends follow-up reminders, and if the person hasn't booked or answered within 7 days, the request expires and any hold on your card is released. You can invite several of the 10 people on this list at once and cap your total spend, so you pay only for the ones who accept.
Can an AI agent ask one of these Tetra Tech engineering leaders a question?
Yes. An agent with a USDC wallet on Base can ask one question without an Instant Expert account. It names the person, for example by the LinkedIn URL on this page, and pays per ask over x402 (HTTP 402). The person answers in writing or by voice note, and if nobody answers within 7 days, the payment goes back to the wallet automatically. Claude and ChatGPT can do the same through the Instant Expert connector: setup is at /docs/mcp for Claude and /docs/chatgpt for ChatGPT. x402 docs
About this directory
This is a professional research starting point based on business profile data retrieved on . Titles and companies reflect that source snapshot; roles marked former had ended by then. Check the linked profiles for current details. Inclusion does not imply Instant Expert membership or availability.
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