John Dunphy, CCIM, SIOR

John Dunphy, CCIM, SIOR

Senior Managing Director

Current Responsibilities

John Dunphy is a Senior Managing Director at JLL and a 33-year veteran of the Tampa Bay industrial market. John leads the Tampa industrial team with a focus on the entire Tampa MSA surrounding Polk, Pinellas and Hillsborough counties.  John’s career experience as a landlord rep, tenant rep and investment consultant include over 31.2M square feet leased/sold totaling over $3.17B in transaction value.  With this experience, John fosters the growth and advancement of JLL’s industrial team members and the team’s footprint within the Tampa MSA.


Prior to joining JLL, John was Managing Director of Industrial Services and Partner at Colliers International Tampa Bay specializing in the sale and leasing of user and investment properties. John has been involved in over 3M square feet of ground-up construction for clients ranging from speculative developments for owners to build-to-suit requirements for owner-occupiers. 

Education and Affiliations

John earned a B.A. in Finance from The University of South Florida. He received the CCIM designation from the Commercial Investment Real Estate Institute and a SIOR designation from the Society of Industrial and Office Realtors. Fewer than 2,000 commercial real estate brokers hold both of these prestigious designations.


  • Over $3.17B in transaction value with over 1,500 transactions completed
  • NAIOP Best Land Deal – 2020
  • NAIOP Best Industrial Project – 2019
  • NAIOP Deal of the Year – 2006
  • Tampa Bay Business Journal Industrial Deal of the Year – 2003, 2004 & 2006
  • Number one overall industrial broker in the Tampa Bay MSA in 2014 and top three every year since 1998

Florida Gulf Coast Commercial Association of Realtors (FGCAR) Number One Industrial Producer, Industrial Deal of the Year (three times) and Overall Deal of the Year