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 Type
Industrial, Land
Energy Group

My Team

My Team

Featured Research
Jul 16, 2020
Q2 2020 | Houston Industrial Market Report
It seems that overall activity, although still slow comparative to normal, started to significantly pick up towards the end of the 2nd quarter across the board from tenants to investors. We believe this trend will continue as...
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Jul 8, 2020
Q2 2020 | Houston Office Market Report
The Houston office market weathered the first phase of the COVID-19 pandemic, as we anticipated, with limited immediate impact on “the numbers.” The lock-downs and social distancing forced companies to embrace a work from home strategy and begin the process of rethinking their...
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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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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 27, 2019
BE.A.Resource | 2020 BEARing Gifts Toy Drive
BEARing Gifts provides holiday gifts to children under the care of CPS who otherwise would have no holiday cheer at all. Each caseworker submits children's holiday wishes to BEAR and then the wish lists are relayed to donors.
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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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