Professional Summary

Gary Mabray has more than 45 years of experience in commercial real estate in Houston and the Gulf Coast region.  As an industrial real estate professional he has particular expertise in warehouse, rail served properties, fabrication facilities, and ship channel sites.  He began his sales career with Texas Industries, selling construction materials, before joining his father, Tom C. Mabray, in the family commercial real estate brokerage business.  During his career, Mr. Mabray has represented a broad range of public and private corporate clients in both industrial and office transactions.

While at Colliers International, he has consistently ranked among the company’s top producing brokers, receiving the Top Producer and Deal of the Year Award and ranking as a Top 10 Producer numerous times over the last 10 years.


  • Colliers' Top 10 Producer (2000, 2002 - 2004, 2007, 2008, 2017)
  • Colliers' Titan Award (2003, 2004, 2006 - 2008, 2014, 2015, 2017 - 2019)
  • CRE Industrial Heavy Hitter Houston Business Journal (2018, 2019)
  • Realtor of the Year, Houston Association of Realtors
  • Deal of the Year Award, Colliers International U.S.A.
  • NAIOP Industrial Deal of the Year (2007)


  • Real Estate Broker's License, Texas
  • BBA in Industrial Management, Texas Tech University

Memberships & Involvements

  • SIOR
  • SIOR, Houston/Gulf Coast Chapter  (Past President)
  • Texas Association of Realtors (Past Regional Vice-President)
  • Houston Association of Realtors (HAR)
  • Houston Association of Realtors (Past President)
  • Colliers Energy Group Member


Distribution Centres, Land Sales, Project Leasing, Warehouses
Service Lines
Landlord Representation, Tenant Representation, Occupier Services
Property Types
Industrial, Land
Energy Group

My Team

My Team

Featured Research
Apr 20, 2020
Q1 2020 | Houston Industrial Market Report
The world is focused on the COVID driven economic slowdown. Houston has two issues to watch – COVID and a collapse in oil prices. The oil issue was driven by the COVID shutdown. Oil has been in the low 20’s since the collision of these two events. The Energy Information Administration is projecting...
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Apr 8, 2020
Q1 2020 | Houston Office Market Report
Colliers generally uses this space to discuss the trends we see in market data and in conversations we have with our clients, prospects and friendly competitors. We take that data and attempt to project activity going forward. The bulk of the first quarter was, for all practical purposes, pre-COVID. Net “move-in” data, as well as...
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Jan 23, 2020
Q4 2019 | Houston Industrial Market Report
Houston’s industrial market expansion continues with the addition of 13M SF of new inventory in 2019
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Featured News
Mar 20, 2020
Colliers International | CoStar Power Broker Awards 2019
CoStar Group, Inc., the data/analytics leader of the commercial real estate industry, has announced this year’s Power Broker Award recipients, recognizing professionals and firms who closed the highest transaction volume in commercial real estate deals and leads in their respective markets.
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Jan 30, 2020
Colliers International announces three new leases totaling 136,626 square feet at Port Crossing Commerce Center in La Porte, Texas
Colliers International is pleased to announce three new leases in Port Crossing Commerce Center in La Porte, Texas.
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Dec 6, 2019
Growing company, Aztec/Shaffer, turns to Houston as their primary home
Aztec/Shaffer, LLC, whose two divisions are comprised of Aztec Events & Tents and Shaffer Sports & Events, renews and signs new leases totaling 250,697 square feet in Houston, Texas.
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Dec 1, 2019
Colliers International | Houston named one of Houston's Top Workplaces and Best Places to Work
Colliers International | Houston is pleased to announce that it has been ranked in the top twenty among Best Places to Work (medium-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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