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The Team

Meriwether Advisors LLC's two main principals, David Rothrock and Doug Barrett are corporate and commercial real estate veterans with combined experience of over 60 years.


David C. Rothrock, SIOR, CCIM



David co-founded Meriwether Advisors in 2013. Previously, David co-founded Meriwether Partners in 2002 where he served as the Managing Director of the firm’s brokerage and advisory division for eleven years. With over 23 years of corporate real estate and site selection experience, he has specialized in representing corporate clients in their tenant representation and site selection needs. David has represented his clients in over 625 transactions and strategic advisory assignments involving over 6 million square feet and $3.5 billion in assets in the Pacific Northwest, nationally and internationally.

Prior to Joining Meriwether Partners, David spent ten years as Senior Vice President at Colliers International, a Seattle based commercial real estate services firm, where he led the Corporate Services team as a single point of contact for many notable companies including Microsoft and Attachmate corporations. David earned his Bachelor of Arts degree cum laude from Seattle University and is a SIOR and CCIM designee. David is a graduate of Leadership Spokane and Leadership Bellevue. David, his wife Kirsten and their four children live in Seattle, Washington.  |  206.816.1572 


Douglas O. Barrett, CCIM, JD


Doug co-founded Meriwether Advisors in 2013 bringing over 18 years of commercial real estate experience to the company. Before joining Meriwether Advisors, in 2000 Doug co-founded ATREG, Inc., an advisory firm specializing in the semiconductor and advanced technology sectors. During his tenure at ATREG from 2000 to 2013, Doug represented clients in over 35 transactions and strategic advisory / consulting assignments involving millions of square feet and $3.5 billion in assets in the United States, Europe and Asia.

Prior to co-founding ATREG, Doug was a Senior Vice President and Director of Corporate Services for the Seattle based commercial real estate firm, Colliers International. He is a two-time recipient of the Colliers International President’s Award for outstanding client service. Doug graduated cum laude with a Distinction in Economics from Colorado College and is a CCIM designee. A licensed attorney, Doug earned his Juris Doctor degree from the University of Washington School of Law. Doug, his wife Laurie and their three children live in Issaquah, Washington.  |  206.816.1579


Matthew G. Brennan, MSRE

Associate Vice President

Matt joined Meriwether Advisors in 2018 to support the team with financial and market analysis. After earning his Washington Real Estate License, Matt expanded his focus to assist managing Meriwether’s corporate and institutional brokerage projects alongside David and Doug. Matt was named Associate Vice President in 2022, and helps lead Meriwether’s brokerage and investment projects focusing on financial analysis, underwriting and project management.

A Seattle native, Matt earned a Bachelor of Business Administration in Finance from Gonzaga University before returning to Seattle to begin his career in real estate. He later earned a Master of Science in Real Estate from the University of Washington.  |  206.459.0782

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