Principal & Director
License # 427139
Mr. Parsley has been involved in all phases of the commercial real estate industry including design, construction and architectural for more than 26 years. John joined Colliers in 1999 and is a Principal and Director of the firm. He specializes in leasing office and investments including the acquisitions and dispositions of commercial buildings. Throughout his career he has represented a wide range of public and private companies in the office, industrial and investment areas, including many law firms, energy, financial services and technology firms.
John has consistently been a Colliers’ Top 10 producer and was named a “Heavy Hitter” by the Houston Business Journal. He previously served as the President of HOLBA and in 2003 earned his SIOR designation. The SIOR designation is a professional symbol of the highest level of knowledge, production and ethics. Only 2,800 commercial brokers worldwide have earned this designation and less than 1,000 are office specialists. John lives by the philosophy of providing the highest level of service to clients, which means being involved in all phases including negotiations, analytical and market research while keeping the client fully informed throughout the entire transaction.
- Colliers' Titan Award (2004, 2006 - 2008, 2011, 2013 - 2019, 2021)
- Colliers' Top 10 Producer (2000 - 2002, 2008, 2009, 2011, 2015 - 2017, 2019)
- Colliers' Everest Club (2016, 2017)
- CRE Office Tenant Rep Heavy Hitter Houston Business Journal (2012, 2018)
- Real Estate Sales Agent's License, Texas
- Bachelor of Arts in Communications, The University of Arkansas
Memberships & Involvements
- Houston Office Leasing and Brokers Association (HOLBA)
- Colliers Law Firm Services Group Member
- Colliers Occupier Advisors Member
“My partners and I simply want to thank you and your team for all of your efforts and hard work with both our recent relocation (and taking of additional space) and our previous lease renewal. Your expertise and advice made the process as painless as it can be. Your knowledge of the Houston market in general and our complex in particular were invaluable to use in securing the best terms possible. While I am certain we could have negotiated the lease extensions on our own (would any lawyer say otherwise), I am equally certain that the final result would not have been as favorable to us as it ultimately was had Colliers not been involved.”
Jeffrey E. Sher, Managing Partner
Fizer, Beck, Webster, Bentley & Scroggins
Senior Executive Administrator, Brokerage Services
Lisa Sims joined Colliers in 2001 as a member of the Office Services Group. She brings more than 23 years of commercial real estate experience to our team. Lisa oversees all aspects of lease and sale transactions from inception through closing, as well as manages the workflow and facilitation of tasks for her team. Lisa has participated in numerous transactions involving office, medical, land and investment properties. She manages the compilation of research materials, creation of marketing and promotional materials, preparation of 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 results for clients and the members of her team.
Prior to joining Colliers, Lisa was with a smaller boutique commercial real estate firm in Houston. Previous to that, Lisa spent 18 years working with homebuilders in Houston and Austin, 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
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.