Bob Mulhern

Bob Mulhern


Senior Managing Director

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Professional Summary

Colliers International in Arizona is a full-service commercial real estate firm, providing integrated services to clients locally and globally for more than 35 years. As senior managing director, I manage the brokerage operations of three offices in Phoenix, Scottsdale and Flagstaff, with more than 100 professionals and staff.

Our team provides a full range of services to owners, investors, occupiers and developers of real estate. Our goal is to deliver superior services to clients and assist with all their commercial real estate requirements, regardless of location.

With more than 30 years of experience, I am a well-respected industry veteran with a highly successful track record managing brokerage, development and property management organizations. Prior to joining Colliers in 2009, I was president of Reliance Companies for five years. Reliance is a Phoenix-area development firm, specializing in office and industrial development and property management.

Previously, I served as vice president of development for four years at Ryan Companies, a nationally-recognized developer, design-builder and real estate manager. My experience also includes six years at CB Richard Ellis in Phoenix as the senior managing director and designated broker. In addition to brokerage and development experience, I have managed more than 10 million square feet of commercial inventory.


  • Honored with the 2015 NAIOP Arizona Award of Excellence
  • Named one of Phoenix's Most Admired Leaders of 2014
  • Chair of the Education Committee of the NAIOP Arizona Chapter
  • Past president and past chairman of the Board of the NAIOP Arizona Chapter 
  • Served 14 years as a board member of the NAIOP Arizona Chapter.
  • Received six NAIOP Project of the Year Awards, including the Redevelopment Project of the Year in 2012 for the Veritas Preparatory Campus

Significant developments completed include:

  • Tosco Building, Tolleson - 240,000 SF industrial distribution
  • Bechtel Building, Glendale - 150,000 SF office building
  • Reliance Loop 101 Project, Peoria - 180,000 SF industrial showroom
  • Reliance Northsight - 138,000 SF three-story, Class A office 


  • Master of Business Administration (MBA), Arizona State University
  • Bachelor of Science in Business Administration, Arizona State University

Memberships & Involvements

  • NAIOP, the Commercial Real Estate Development Association
  • Urban Land Institute (ULI)
  • Great Hearts Arizona, Charter School Management Organization, Board President
  • Diocese of Phoenix Finance Council, Board Chairman
  • Tepeyac Leadership Initiative, Board Member
  • Colliers AZ Cares Foundation Board Member


Property Types
Healthcare-Medical, Hotel, Industrial, Land, Office, Multifamily, Retail

My Team

My Team

Featured Research
Feb 29, 2020
2019 Q4 Greater Phoenix Medical Office Market Report
YTD developers added 380,269 SF to the Greater Phoenix medical office market. Despite the increase in deliveries, vacancy only slightly increased 80 bps to end the year at 14.4%. Asking rents decreased in fourth quarter 0.6%, but increased 2.3% over-the-year to its current $20.99 PSF.
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Feb 13, 2020
Year End 2019 Phoenix MSA Multifamily Review
Phoenix MSA continues to lead the nation in rent growth, rising 9% y/y to $1,185, still well below the national average rent of $1,415. More than 8,700 units came online during 2019. Given the current construction rate, 2020 should prove to be the highest delivery amount since 2009’s 9,315-units.
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Feb 12, 2020
2019 Q4 Greater Phoenix Office Market Report
Overall the Greater Phoenix office market had an incredible fourth quarter; net absorption remained positive, with over 1 million square feet absorbed. After witnessing an impressive Q3 net absorption fall just shy of 1 million square feet, it just keeps getting better.
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Featured News
Mar 11, 2020
Phoenix medical office market thrives with health services job growth
According to Colliers International’s fourth quarter research report, the Greater Phoenix medical office real estate market continues to thrive, largely driven by job growth in the health services sector. Developers have been adding new space to the market, but demand has kept vacancy low.
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Mar 10, 2020
Colliers International in Arizona announces 2019 top producers
Colliers International in Arizona announced its top producing agents for 2019. Four of the firm’s top producers were women. The company’s brokerage professionals exceeded 2018 performance by 13 percent, creating Colliers’ second-best year since entering the Arizona market.
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Feb 20, 2020
Colliers International awarded Best of Business by Flagstaff Business News
Colliers International in Arizona’s Flagstaff office won two Best of Business 2019 awards from the Flagstaff Business News and was recognized as the area’s top Commercial Real Estate Agent and the leading Business Broker.
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Feb 19, 2020
Greater Scottsdale Airpark 2030 Report highlights shift to mixed use
Colliers International in Arizona released its Greater Scottsdale Airpark 2030 Report, highlighting market conditions and predictions for the submarket. The area has become an 18-hour city, with a growing mix of apartments, modern retail, hotel amenities and traditional commercial space.
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