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.

Mr. Duffy graduated from Florida State University with a major in Real Estate/Finance, ranked the 5th best real estate program in the country. He started his career as a landlord representative for the Howard Hughes Office Portfolio in The Woodlands, TX and completed over 100+ lease transactions during his three-year tenure.

Coming from a background of real estate experts across the country, Mr. Duffy possesses a deep understanding of finance, psychology, and macro/micro economics. He brings a unique perspective to his work, which allows him to deliver exceptional results for his clients. In early 2022, Mr. Duffy joined the Capital Markets as team as a partner under the leadership of Todd Moore. He has since began the role as the head of the Retail Division. 

Mr. Duffy’s primary focus is on developer and investor clients in the single and multi tenant net lease market sectors throughout the United States. The Houston Capital Market Team’s extensive financial background and modeling skills create the unique ability to understand, evaluate and market a broad spectrum of real estate assets.

Ivonne Gonzalez joined Colliers in 2007 as a member of the Office Services Group.  She brings more than nine  years of commercial real estate experience to our team.  Prior to moving to the Houston office, Ivonne was working for an independent owner/developer supporting the construction department as a Construction Coordinator, which entailed abstracting leases, monitoring critical dates through the due diligence process, review, track and notify tenants of plan approvals, overseeing tenant build-outs, administer tenant improvement allowance along with a host of other activities.

Working in the Capital Markets group, Ivonne provides a high level of marketing support from coordination of marketing programs to the individual needs of each project to achieve maximum productivity, communication and client satisfaction. Ivonne provides brokerage support services including promotional and marketing materials, working with financial analysis software, contact and database management along with a host of other activities related to the various landlord representation assignments as well as acquisition and disposition of investment grade properties.

Through her previous positions, Ivonne has experienced a variety of aspects of the commercial real estate business including site selection and disposition, leasing, user sales and investment grade sale transactions as well as property management and construction management, to name a few.  Her strong technical skills, background with computer applications and her great attitude offer a combination of skills necessary to manage the project and provide an innovative marketing strategy and promotional materials specific to each client and their respective projects.

Patsy joined Colliers in 2023 as the Research Director and has more than 40 years of communications, research and statistical analysis experience in the commercial real estate industry. She produces annual and quarterly market-area reports and project-specific custom reports for client presentations while effectively utilizing commercial real estate tools and databases.

Patsy has a deep understanding of how to capture real estate data, analyze market trends and provide meaningful data-driven insights to assist clients in finding solutions to meet their real estate needs.

Previous Roles

• Senior Insight Analyst/Research Manager for Avison Young’s Houston office from 2018-2022. Responsible for leading market research by tracking and analyzing key economic and market trends. Maintained office and industrial building data and comps in a proprietary in-house database.
• Senior Market Analyst for Commercial Gateway, the commercial division of the Houston Association of Realtors, and for CDS Market Research. 
• Served as Communications/Research Director for The Horne Company and Grubb & Ellis. 
• Edited a local monthly magazine, a weekly newspaper and a special section for the Houston Post.