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Tenant Representation
Advising Tenants Through Expertise and Action

About Occupier Services San Diego

Making the right space decision is more than the building or location you choose — it impacts your people, brand and culture, operations, risk and costs. With a long history supporting tenants, Occupier Services San Diego applies our specialized advice and leads a defined process to drive the best outcome for your business.

  • Capital markets expertise 

  • Financial analysis 

  • Lease negotiation and renewal

  • Location analysis and site selection

  • Transaction advisory – acquisition and disposition

Our Team


Ron Miller
Senior Vice President

As a native San Diegan and Corporate Real Estate Advisor, Ron represents local, regional, and national corporate office tenants. Ron’s experience and extensive market knowledge allow him to deliver the highest level of service to his clients in all facets of their corporate real estate endeavors, which include managing requirements for new locations, renewals and dispositions, as well as containment of overall real estate costs. With his extensive career experience in landlord and tenant representation, Ron offers a unique perspective and valuable insight in exclusively representing corporate office tenants.

Prior to joining Colliers International, Ron served as a principal at CresaPartners focusing on tenant representation. He was Senior Vice President, Principal, and a top producing broker at Burnham Real Estate for representing both Tenants and Landlords.  

  • LinkedIn

Lisa Gillespie
Graphic Designer

Lisa Gillespie is an imaginative and creative professional, harnessing her extensive design and marketing skills to amplify the success of Occupier Services San Diego Team at Colliers. She has a knack for crafting original and captivating marketing materials, covering everything from engaging brochures, presentations, and social media content to compelling email campaigns, pitch decks, maps, websites, and eye-catching videos.


Her mission is to bring fresh, innovative solutions and a touch of magic to each client and property, all while staying true to Colliers' high standards.


Lisa's love for great design and top-quality content shines through her expertise in Adobe Creative Cloud, where she excels with InDesign, Illustrator, and Photoshop to create exceptional results.

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Chris Reutz
Research Director

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Aaron West
Managing Director

Since 1996, Chris has consistently achieved success in assisting both internal and external commercial real estate (CRE) clients by providing them with timely and accurate market statistics, trend analysis and relevant reporting.

His goal is to continuously work toward efficient and better ways to accelerate the success of clients.

Chris' specialties include commercial real estate (CRE) market research, statistics, data and analysis; database administration; geographic information systems (GIS); marketing and reporting.

Aaron West serves as the Managing Director of brokerage for Colliers' Las Vegas and San Diego offices, overseeing all brokerage operations and service lines with a critical focus on strengthening business development, improving service delivery, and recruiting world-class talent.

With nearly 15 years of industry experience, including business development and lead generation, Aaron brings a proven track record of positive results and a deep understanding of the brokerage business to his dual-market leadership role. Providing best-in-class service and results to Colliers' clients, including owners, occupiers, investors, and developers, he is dedicated to the constant pursuit of improvement, creating unsurpassed intellectual capital within the market.

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