Sean Westfall | Colliers International | Phoenix

Sean Westfall

Senior Associate

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Professional Summary

As a senior associate with Colliers International, I specialize in investment services in partnership with the team of Mindy Korth, executive vice president; Jenny Bassett, real estate analyst; and Kelsey Robinson, client services coordinator.

Our team specializes in investment sales across all property types and advises a wide range of clients from institutional and private capital investors to lenders, special servicers, REITs and foreign capital groups. Clients benefit from our team’s strategic advice, customized marketing strategies, detailed financial analyses and market knowledge.

On behalf of the team and our clients, I prepare investment and financial analyses of capitalization rates, cash flow and replacement costs. My responsibilities also include business development and database management. Through targeted marketing, I source and evaluate potential investment opportunities, as well as preparing listing proposals, presentations and broker opinions of value.

As a proactive partner to our clients and a diligent problem-solver, I am committed to delivering results. Meeting regularly with buyers, sellers, landlords, tenants, appraisers, property managers, and business and community leaders, I establish strong relationships.

Before joining the investment services team, I specialized in healthcare real estate services for Colliers, representing clients in the acquisition, disposition and leasing of healthcare real estate.

Prior to Colliers, I served as an office brokerage intern at CBRE in Phoenix, where I gained in-depth knowledge of commercial office leasing. Responsibilities including editing and maintaining an extensive property database and assisting in the property marketing process.

Previously, I was a retail strategist intern with DriveTime, where I completely redesigned a new interface for the company intranet and reformatted the car price sticker used across the United States. I was also a brokerage intern at GBC Partners, Inc., in New York City, a leading global brokerage company servicing the wholesale financial and real estate markets.


  • 2017 – Nominated Best of NAIOP Office Broker of the Year
  • Named the David L. Hallstrom Rookie of the Year by Colliers International in Greater Phoenix
  • 2015 – Nominated Best of NAIOP Rookie of the Year


  • Bachelor of Science, Finance; University of Arizona, Eller School of Management
  • Arizona School of Real Estate and Business

Memberships & Involvements

  • NAIOP, the Commercial Real Estate Development Association, Developing Leaders
  • Urban Land Institute (ULI)
  • Valley Partnership


Investment Properties, Mixed-Use Properties
Service Lines
Landlord Representation, Capital Markets
Property Types
Office, Industrial, Retail, Healthcare-Medical

My Team

My Team

Featured Research
Jul 18, 2020
2020 Q2 Greater Phoenix Medical Office Market Report
The Greater Phoenix medical office market added 244,956 SF of inventory in second quarter with a vacancy of only 18% within these projects. Net absorption was 192,001 SF in second quarter. Vacancy settled at 13.8 percent. Rental rents settled at $21.58 PSF.
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Jul 13, 2020
2020 Q2 Greater Phoenix Retail Market Report
The Greater Phoenix retail market ended the second quarter on the upside. Regardless of the retail sector being hit the second hardest of all CRE industries (second to hospitality), the market managed to produce 14,134 square feet of positive absorption.
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Jul 6, 2020
2020 Q2 Greater Phoenix Office Market Report
The Greater Phoenix office market experienced a healthy second quarter. Sublease space increased 82% over-the-quarter. Net absorption remained positive for the 33rd consecutive quarter with 205,372 SF net absorption. Vacancy settled at 13.1%. Rental rates held strong with an average of $25.71 PSF.
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Featured News
Aug 4, 2020
Phoenix medical office market thrives in Q2 during pandemic
Colliers International reports the medical office market posted its strongest quarter of net absorption in nearly two years and vacancy dropped 50 basis points to 13.8%. Approximately 244,956 SF of new medical office space was added to inventory and only 18 percent of that is vacant.
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Jul 20, 2020
Greater Phoenix retail market remained healthy in Q2 2020
Colliers International reports the Greater Phoenix retail market finished Q2 2020 with positive net absorption, despite the impact of pandemic business interruptions. Vacancy remained healthy, but experts look towards the second half of the year to determine the long-term effects of COVID-19.
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Jul 10, 2020
Phoenix office market remained positive in Q2 2020
The Greater Phoenix office market remained relatively healthy during second quarter. According to Colliers International’s market report, the office sector posted its 33rd consecutive quarter of positive net absorption and office vacancy remains below 15%.
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Apr 23, 2020
Greater Phoenix office market posted strong first quarter 2020
Colliers International reports the Greater Phoenix office market posted a healthy first quarter 2020, being the 32nd consecutive quarter with positive net absorption. More than 100,000 square feet of positive net absorption took place in first quarter and the vacancy rate remained below 13 percent.
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