Occupier Advisors - Colorado

Aligning Real Estate Needs with Corporate Goals

Whether you occupy a single property or a portfolio of properties, Colliers Occupier Advisors – Colorado specialized real estate services focuses on enhancing corporate

  • business operations;
  • employee satisfaction; and
  • balance sheet

To meet the aforementioned objectives, our team brings to bear the tremendous resources of our platform to discover

  • what is important to you;
  • your financial objectives; and
  • your core values

Upon understanding the core values of your firm, we

  • implement a real estate strategy to increase productivity and profitability while enhancing company culture;
  • create tactics to lower real estate costs and mitigate risk;
  • provide an integrated process designed to align your real estate needs with your corporate goals.

Colliers Occupier Advisors – Colorado’s no risk – all reward real estate method goes well beyond simply solving your real estate needs; we solve your business needs.


Our team


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Robert Whittelsey
Principal | Occupier Advisors Group

Consistently recognized over the past two decades as one of the top brokers in Colorado by the Denver Business Journal, I am widely recognized for my real estate strategy development and negotiation skills. The strength and depth of my local and national market knowledge combined with the vast resources deployed on behalf of my clients, results in unparalleled results.

As a Principal of Colliers International Denver and team leader of the Office Property Division, I provide a full range of services to my clients to assist them with identifying their core goals and values.  Then through listening to my clients, I create solutions that positively affect their operations and balance sheet through reduced costs, increased productivity and increased earnings.

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Abby Pattillo
Vice President

Abby began her career at Colliers Intentional Denver as a Research Analyst, responsible for the aggregation, analysis, interpretation, and reporting of market research data.  In this role, she developed client-oriented interpretations and graphics indicating market trends and interpreted this data through various graphic formats, including quarterly written market reports and other presentation quality documentation of market activity and trends.

The experience Abby gained as a Research Analyst played an integral part in her transition into brokerage as she is very familiar with the market and well versed in market trends, making her an ideal tenant representation broker.  Abby works collectively with Jason Sheehy on the tenant representation team and also assists the Southeast landlord representation team. 

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Bree Quintieri

With over 6 years of prior experience in commercial real estate with a focus in Industrial Brokerage and Transaction Management, Bree Quintieri relocated and joined Colliers International Denver in 2017 as the Transaction Director of Office Properties. She has quickly merged back into Brokerage with a focus on office services including, but not limited to:

  • Landlord Representation
  • Tenant Representation
  • Corporate Solutions
  • Occupier Services

Working collectively with Robert Whittelsey and Abby Pattillo, Bree aids her team members in their day-to-day brokerage business including: proposals, contracts, lease administration, research, document creation, analytical research, marketing, and correspondence.

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