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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 22 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.  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. 


  • “Power Broker” award for leasing transaction volume in previous years
  • CRE Industrial Heavy Hitter Houston Business Journal (2016, 2019)
  • CRE Office Landlord Rep Heavy Hitter Houston Business Journal (2014)
  • Colliers' Top 10 Producer (2008 - 2011, 2013, 2015, 2018 - 2019)
  • Colliers' Titan Award (2007 - 2008, 2010 - 2011, 2013 - 2016, 2018 - 2020)
  • Colliers' Everest Club (2013)
  • 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 22, 2021

Q1 2021 | Houston Industrial Market Report

Industrial demand has accelerated under and after COVID with e-commerce distribution and new supply chain requirements leading the way
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Mar 8, 2021

2020-2021 Houston Economic Outlook

Last January, we predicted steady growth for the Houston economy barring a “black swan” event and mentioned the “new Corona Virus in China” as an example. Little did we know that the virus would end up being the Godzilla of black swan events.
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Jan 20, 2021

Q4 2020 | Houston Industrial Market Report

The industrial real estate market continued to be Houston’s most robust commercial real estate market sector in the fourth quarter. With tailwinds from the Q3 post-shutdown recovery, Houston’s fourth quarter saw...
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Featured News

Jun 2, 2021

Why you may not want to “hold out” for a possible higher sublease rent down the road.

In today’s market, subleases are a common strategy to relieve obligations for any type of space that is no longer used or needed. Unfortunately, in a down market, finding subtenants can be particularly challenging. Often, the focus for occupiers is on what the...
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Mar 22, 2021

Why Present Value Matters When Comparing Occupancy Costs & How to Address Some Challenges in Making a Fair Comparison

As a financial analyst, a common question I hear from our occupier clients evaluating lease options is: “Why does present value matter?” Perhaps, they are thinking that they are not purchasing an asset, so...
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