ABOUT COLLIERS
Warner Retail Team
Warner Retail Team
The Warner Retail Team unites the Retail Capital Markets regional & local experts via experienced project management & efficient communication.
They leverage their extensive expertise in coordinating deals — especially deals that involve properties in multiple markets — and bringing together deep local experience that spans our service lines. Our leadership organization is responsible for making sure that the best team is always on the field and that each tailored group of Colliers experts fully leverages our proven, best-in-class capabilities to deliver winning outcomes for our clients.
The team’s efficiency in shepherding complex property campaigns ensures that we can always scale effectively to client needs, while never leaving our clients with the impression that we are too big for them.

Strategic Scaling
Colliers’ expansive reach enables us to service clients nationwide and connect them to buyers around the globe. We believe, however, that the key to best leveraging our scale must always start with understanding each client’s unique needs and desired outcomes, and tailoring strategies that scale precisely.
National opportunities that span multiple markets require increased rigor & efficient communication to manage effectively. Experts at managing complexity, Colliers’ ability to scale is always an asset and never an inefficiency.
Uniting Expertise
With trusted advisors in every market and specialties across our comprehensive set of service lines, our local professionals are everywhere you need us to be.
Colliers unites these experts, across our large network of offices, to empower each strategy they devise for our clients. For every opportunity, they hand select the precise set of market advisors and service line specialists to ensure our clients always have the best possible team.
Warner Leadership Team Executives
El Warner
Executive Vice Chair | Retail Capital Markets
Irvine, CA
In his role as Colliers National Retail Capital Markets U.S. leader, Mr. Warner leverages his extensive expertise and deep CRE investor relationships to advise the largest owners and buyers of retail centers nationwide.
Charley Simpson
Senior Vice President | Retail Capital Markets
Irvine, CA
Charley has advised clients in the disposition or acquisition of over 150 shopping centers across the country totaling over $2.7 billion in consideration, and specializes in the sale of multi-tenant shopping centers.
Caitlin Zirpolo
Vice President | Retail Capital Markets
Irvine, CA
As Vice President and co-partner of the Institutional Property organization, Caitlin specializes in the disposition of high quality retail assets nationwide, has broken numerous national cap rate records.
Featured Experts
Alyssa Mera
Senior Associate | Retail Capital Markets
San Diego, CA
As a member of the Private Capital Group at Colliers International, Alyssa specializes in the acquisition and disposition of privately owned shopping centers and net leased assets in Southern California.
Ryan Marn
Senior Vice President | Retail Capital Markets
Seattle, WA
Ryan’s area of specialization is institutionally and privately held retail assets in Washington, Oregon, and Idaho. He spent 13 years with Colliers International as an Associate Vice President for Retail Capital Markets.
Mindy Korth
Executive Vice President | Retail Capital Markets
Phoenix, AZ
Mindy is accomplished in all sectors of the investment real estate community including office, medical office, retail, data centers, high-finish industrial, commercial land, and unique projects across Phoenix & nationally.
John K. Jackson
Vice President | Retail Capital Markets
Phoenix, AZ
John specializes in the sale & leasing of retail properties, representing landlords, tenants, and investors. John has completed transactions for retail shopping centers, neighborhood centers, and standalone properties.
SHANNON LEONARD
Associate | Retail Capital Markets
Irvine, CA
Shannon specializes in the disposition of retail properties in Northern California and Reno/Tahoe. Before moving to the Retail Capital Markets Team, Shannon specialized in luxury residential sales in Lake Tahoe.
TAMER RIAD
Senior Associate | Retail Capital Markets
Portland, OR
Tamer specializes in retail in the Portland Metro area as well as surrounding markets and cities. Disciplines include leasing, acquisition, and sales of commercial real estate properties.
ROBBIE MACNICHOL
Senior Associate | Retail Capital Markets
Portland, OR
Robbie specializes in sales, leasing and development of standalone multitenant and Mixed-use Projects.
Steven Roberto
Analyst | Retail Capital Markets
Irvine, CA
Steven specializes in underwriting large institutional assets across the U.S. He is passionate about the numbers, and finds value for a wide range of clients by utilizing both thoughtful data analysis and high attention to detail.
Molly Patten
Client Services Specialist | Retail Capital Markets
Irvine, CA
With over 16 years of real estate industry experience, Molly leads the Capital Markets Client Services organization. Her unwavering “clients first” focus drives our reputation for unparalleled client satisfaction.
Find An Expert
Connect With Our Specialists
Join Our Network
Stay up to date with the latest Commercial Real Estate Investment Market Trends & Opportunities nationwide.