Guiding our long-term vision and daily operations

The leadership of Parametrix is committed to increasing company stock value and growing the business in alignment with our Strategic Plan. Our leadership is made up of solutions-oriented individuals who make sure the company upholds our commitments to provide outstanding client service and quality work through collaboration and a spirit of employee ownership. Parametrix is governed by a Board of Directors and daily operations are managed by our Enterprise Leadership Team.

Meet our Enterprise Leadership Team​

John Willis
President and Chief Executive Officer

John joined Parametrix in 2017 and became CEO in 2023. He has served in a variety of leadership positions during his career and managed significant infrastructure projects.

“It's different here! The best part of Parametrix is the high level of collaboration and innovation driven by our employee-owned culture. Every employee-owner is vested in the health of the company and that benefits our clients, teaming partners and ultimately, the communities we serve.”

Nathan Johnson
Senior Vice President

Nathan joined Parametrix in 2022 and has extensive experience building teams and delivering transportation needs. He oversees offices in California, Nevada, New Mexico, and Utah.

“Parametrix’s employee-owned culture enables us to attract and retain the best talent and serve our clients in the strongest, most reliable way possible. I love that we directly impact our communities for the better, serving the needs of others with safety at the forefront.”

Leslie Sowles
Director of Human Resources

Leslie joined Parametrix in 2024. She specializes in HR compliance and policy development, conflict resolution, leadership development, and building strong and diverse teams.

“I joined Parametrix because of its reputation as a people-forward organization. I’m excited to contribute to the Parametrix team and looking forward to being part of a 100% employee-owned company.”

Brent Diemer
Executive Vice President and Chief Financial Officer

Brent joined Parametrix in 2022 with more than 25 years of industry experience. He specializes in financial management, business growth and expansion strategy, and organizational culture development.

“The best thing about Parametrix is the opportunity to collaborate with our clients to help solve their most complex infrastructure matters. I love the satisfaction of knowing that the projects we deliver are improving people’s lives today and for generations to come.”

Denise Ledingham
Director of Communication & Client Outreach

Denise joined Parametrix in 2000 and has held several roles in the company all involving communication and cross-office collaboration.

“I enjoy the opportunity to serve in different roles and be involved in special projects. The best thing about Parametrix is the opportunity to interact with various clients and employee-owners to connect the employee and client experience!”

Darby Watson, AICP
Senior Vice President

Darby joined Parametrix in 2019 and has strategic leadership experience overseeing transportation and urban planning programs. She oversees the Washington offices.

“The best thing about Parametrix is our relationship with clients. We develop career-long trusted partnerships built on collaboration and integrity. We are able to provide services that create stronger, more resilient communities through those relationships.”

Roger Flint
Chief Operating Officer

Roger joined Parametrix in 2017 and has extensive experience in infrastructure development and all aspects of public works, transportation, and utility operations.

“The best thing about Parametrix is our ability to be involved with regionally significant projects while remaining community-focused and nimble. I love seeing the direct impact each of us, as employee-owners, can make.”

Richard Roche, RG, LHG
Senior Vice President

Richard joined Parametrix in 2002 and has worked as a project manager as well as part of the leadership team. He oversees the Oregon and Idaho offices.

“The best thing about Parametrix is the platform we provide for every employee-owner to make a difference for our clients, company, and communities. Throughout my career, I’ve enjoyed building genuine friendships with clients and fellow employee-owners.”

Elisa Young, JD
Director of Diversity, Equity, and Inclusion

Elisa joined Parametrix in 2023 as Director of DEI. She strives to create a workplace where everyone feels respected, valued, and heard.

“The best thing about Parametrix is the people who make Parametrix what it is—our employee owners, clients, and the communities we help to build. I love being able to understand, advocate, and elevate people—who they are, their backgrounds, history, passions, and needs and connecting that to how and why they contribute to Parametrix.”

Meet our Board of Directors​

Waite Dalrymple

Founder of Parametrix

Jeff Peacock

Chair of the Board

John Willis

President and Chief Executive Officer

Blake Murillo

Past Chairman of the Board, PSOMAS

Frank Buhler

Principal, Zachary Scott & Co. Investment Bankers

John Okamoto

President, Okamoto Strategies

Sielen Namdar

Industry Executive | Global Sustainability Lead for Industries, Cisco

Tim Jenkins

Founder and President, Colchuck
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