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Professional Summary

Walker focuses primarily on industrial real estate sale and lease transactions involving warehouses, manufacturing facilities and land in the greater Houston area. He was named Principal in 2010, and was elected as a Director in 2013. He serves on the firm’s Governance Committee. He also leads the industrial division of the firm, a group comprised of 28 industrial real estate specialists. He has demonstrated consistent leadership in revenue production and has been recognized as a regular top ten performer in Houston. Walker has also achieved revenue performance in the top 10% of all Colliers offices worldwide.

Prior to joining Colliers, he graduated from the Jesse H. Jones Graduate School of Management at Rice University in 2002. While earning an MBA, he worked for FedEx in Hong Kong. Prior to graduate school, Mr. Barnett served for four years on the legislative staff of United States Senator Bill Frist in Washington, DC. 

He graduated from Vanderbilt University in 1996.


  • “Power Broker” award for leasing transaction volume in previous years
  • Colliers' Top 10 Producer (2008 - 2011, 2013, 2015, 2018 - 2019, 2021)
  • Colliers' Titan Award (2007 - 2008, 2010 - 2011, 2013 - 2016, 2018 - 2021)
  • Colliers' Everest Club (2013, 2021)
  • Colliers’ Million Dollar Producer Award (2013, 2021)
  • CRE Industrial Heavy Hitter Houston Business Journal (2016, 2019)
  • CRE Office Landlord Rep Heavy Hitter Houston Business Journal (2014)
  • National Association of Industrial and Office Properties (NAIOP)  Industrial Rising Star Award Recipient (2007)


  • Real Estate Sales Agent's License, Texas
  • MBA, Rice University
  • Vanderbilt University

Memberships & Involvements

  • Society of Industrial and Office Realtors (SIOR)
  • Houston Gulf/Coast SIOR Board (2016 President)
  • The Women’s Home Board of Directors
  • Afton Oaks Civic Club President
  • Grand Mission Municipal Utility District #2 Elected Director
  • St. Michael Catholic Church



Design and Build, Distribution Centres, Financial Analysis, Investment Properties, Land Marketing, Land Sales, Lease Advisory, Project Leasing, Warehouses

Service Lines

Landlord Representation, Tenant Representation, Occupier Services, Capital Markets

Property Type

Industrial, Land

My Team

Featured Research

Apr 15, 2022

Q1 2022 | Houston Industrial Market Report

We expect user demand in SE Texas to remain very strong in the industrial market as re-shoring and supply chain adjustments accelerate. While there are many storm clouds on the horizon, we expect 2022 to be a solid year for industrial real estate in Houston and SE Texas.
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Mar 16, 2022

2022 Houston Economic Outlook

Last year we made a few projections and discussed a few concerns we saw on the horizon. In reviewing those comments, it seems we hit the big picture in the center of the target. We projected that oil and gas demand would continue to increase as...
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Jan 24, 2022

Q4 2021 | Houston Industrial Market Report

Despite adding approximately 25 million square feet of new industrial space in 2021, the market took it in stride and managed to absorb a record 28.5 million feet and drive the vacancy rate down to 7.1%.
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Featured News

Oct 28, 2022

Colliers | Houston named one of Houston's Top Workplaces and Best Places to Work

Colliers | Houston is pleased to announce that it has been ranked the fourth Best Places to Work (large-sized companies) by the Houston Business Journal and has earned another spot as Top Workplace for the 9th consecutive year by the Houston Chronicle.
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Aug 10, 2022

An update on US and Houston construction costs and delays

Our last report on this topic was July 2021, when we experienced a huge surge in construction costs and delays. The dust has settled a bit, but cost increases and delays continue to be problematic to anyone to anyone in the middle...
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