Derek Mason, MAI

Derek Mason, MAI

Senior Director

Current responsibilities:

Derek Mason is a Senior Director within JLL Value and Risk Advisory and is based in Seattle, WA. Mr. Mason’s extensive appraisal experience includes a broad range of property types including office, industrial, retail, vacant commercial land, multifamily, and mixed-use. Mr. Mason has performed valuations on proposed, partially completed, renovated, and existing structures.

Clients served include local and national investment firms, owners, development and operating companies, commercial and investment banks, insurance companies and REITs.


Prior to joining JLL, Mr. Mason spent 6 years at Colliers Valuation where he served as a Valuation Services Director specializing in the analysis of institutional-grade office properties. Mr. Mason began his appraisal career in 2011 as an Associate at O’Connor Consulting Group, LLC.


  • Bachelor of Arts in Geography, Concentrations in Economics & GIS – University of Washington


  • Member – Appraisal Institute (MAI)

Certified General Real Estate Appraiser in :

  • California
  • Idaho
  • Montana
  • Oregon
  • Washington