Principal & Director
License # 503935
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)
- 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
Industrial Client Services Lead
Kristina joined Colliers in 2014 and has quickly excelled into the Industrial Client Services Lead role for one of the largest industrial and land teams in the region. The team specializes in the sale and leasing of industrial and land real estate in the Southeast Texas market.
Kristina manages all aspects of marketing and client services for the team which includes creating impactful print and digital property marketing collateral tailored to each property and client while efficiently tracking and managing the team’s property listings, client databases and property activity. Her goal is to drive the team’s property marketing strategy to ensure optimal and targeted visibility in the marketplace. In support of business development, Kristina prepares high-quality content for listing proposals, presentations, and market research and she also oversees transaction administration, including sale and lease documents and coordinating the due diligence process. Her strong analytical and organization skills make her an invaluable resource in the day-to-day operations of the team and have allowed her to excel to the client services lead role.
Kristina earned both the Commercial Property Marketing Certification (CPMC) and Commercial Property Research Certification (CPRC) from Colliers University. CPMC and CPRC are the first and only accreditations for commercial real estate marketing and research professionals. It offers a professional development path to increase strategic and tactical expertise in marketing/research, knowledge of the industry and capabilities with commercial real estate tools.
Prior to her Project Coordinator role she worked as an Executive Assistant and Marketing Coordinator at S.E. Covington & Company where she assisted in the launching and marketing of the project leasing division totaling more than 1.8 million square feet of industrial, retail, and office space. She also created a new image for the company’s marketing materials and website.
Director of Market Research
Lisa joined Colliers in 2010 as Director of Market Research and has 37 years of commercial real estate experience. Lisa initiates proactive market research projects to further the business goals of the company. She writes and prepares 29 market reports annually, including quarterly reports on Houston's retail, office, industrial and healthcare properties. Further, she prepares statistical ownership reports for various clients as well as an annual Houston Economic Overview. Lisa also creates PowerPoint market presentations, trade journal articles, and other marketing materials supporting the company's business endeavors. She works with senior management in planning the company's marketing strategy and public relations support for local and national conferences, luncheon meetings, recruitment programs, and special events. Lisa works closely with the company's brokers to develop effective custom market research material specific to existing and potential clients.
Lisa serves on the Colliers Editorial Board, the Colliers U.S. Research Council, and is a recipient of the Colliers Researcher of the Year Award.
Lisa earned the Commercial Property Research Certification (CPRC) from Colliers University. CPRC is the first and only accreditation for commercial real estate research professionals. It offers a professional development path to increase strategic and tactical expertise in marketing/research, knowledge of the industry and capabilities with commercial real estate tools.
Director, Financial Analytics
Bringing 32 years of experience in commercial real estate, Marilynne joined Colliers in 2018 to provide financial analysis to the company’s leasing and investment sales teams for all types of assets, including the following types of financial analysis:
- lease renewal and relocation comparisons
- mid-term lease renegotiations (“blend and extend”)
- lease buyouts
- sublease disposition/recovery
- build-to-suit vs. design-build
- lease vs. buy
- own vs. sale/leaseback
- landlord net effective rate
- discounted cash flows
Prior to joining Colliers, she specialized in advising companies regarding their financial analysis for commercial real estate requirements or investments for 17 years. Marilynne also has a background in commercial mortgage underwriting/loan originations and commercial real estate appraisal.