Principal | Houston
License # 551809
Mr. Ryan has been involved in the commercial real estate business for 17 years, 13 years of which he has spent at Colliers International.
Walker joined Colliers International in the Office Services Group in 2006, specializing in tenant representation and owner representation. Walker has been a top producer at the Colliers Houston office since 2013.
Prior to joining Colliers International, Mr. Ryan began his career at The Friedkin companies as a Financial Analyst, and in 2001 made a transition to Lewis Realty Advisors as an appraiser. Following that, Walker accepted a position with Avail Consulting (formerly Arthur Andersen’s valuation group) in their Real Estate division. In 2005, Walker made the move to U.S. Trust, as a Vice President in the Business Development division.
Walker’s abilities to determine value, to run and understand financial models and to work well with clients, coupled with his market knowledge, and working experience with the leading commercial brokerage firms, building owners, REITS, developers, property management companies and financial institutions make him an asset to all of his clients in their real estate decision-making process.
- Colliers' Top 10 Producer (20014, 2015, 2018)
- Colliers' Titan Award (2012, 2014 - 2019)
- CRE Investment Heavy Hitter Houston Business Journal (2019)
- Real Estate Sales Agent's License, Texas
- BBA in Finance, Baylor University
Memberships & Involvements
- Chapelwood United Methodist Church
- Hearts Association
- Young Hearts Association
- First Tee Association
- Cadence Bank
- CHRISTUS Health
- Bridgewood Development
- Health Care REIT
- Neptune Marine
- Medica Development
- Northern Natural Gas
Senior Executive Administrator, Brokerage Services | Houston
Lisa Sims joined Colliers International in 2001 as a member of the Office Services Group. She brings more than 21 years of commercial real estate experience to our team. Lisa participates in transaction management and facilitates successful lease and sale transactions for the clients and brokers of her team. She provides a high level of professionalism and superior internal and external client service to every assignment. Lisa has participated in numerous transactions involving office, medical, land and investment properties. She manages the compilation of research materials, creates marketing and promotional materials, prepares financial analysis reports, and provides various other brokerage support services to insure the success of each project in which she is involved. Lisa’s strengths are her attention to detail, unique problem solving skills and her commitment to excellence. She has built an outstanding reputation as a dedicated professional with a strong work ethic and has a proven record of providing excellent internal and external client service to accomplish team goals.
Prior to joining Colliers International, Lisa was with a smaller boutique commercial real estate firm. Previous to that, Lisa spent 18 years working with homebuilders in Houston, Texas and in Austin, Texas, where she gained a multitude of knowledge in many different aspects of residential real estate transactions. Lisa is a native Houstonian.
Director of Market Research | Houston
Lisa joined Colliers in 2010 as Director of Market Research bringing 26 years of commercial real estate experience to the firm. Lisa initiates proactive market research projects to further the business goals of the company. She writes and prepares 29 market reports annually which include 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 in support of 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 both existing and potential clients.
Lisa serves on the Colliers International Editorial Board, the Colliers International U.S. Research Council, is a Colliers Center of Excellence team member and is a recipient of the Colliers International 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 | Houston
Bringing 31 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. Prior to joining Colliers, she specialized in advising companies regarding their commercial real estate requirements or investments, including the following types of financial analysis:
- lease renewal and relocation comparisons
- mid-term lease renegotiations (“blend and extend”)
- lease buyouts
- sublease disposition/recovery
- comparison of build-to-suit/design-build to lease
- lease vs. buy
- own vs. sale/leaseback
- landlord net effective rate and IRR
- investor discounted cash flow analysis
- direct capitalization
Marilynne also has a background in commercial mortgage underwriting/loan originations and commercial real estate appraisal