Sean Barnes

Sean Barnes

Senior Director


As senior director with Cushman & Wakefield's Brokerage Services Group, Sean Barnes brings over 20 years of experience in real estate advisory and commercial brokerage services. He has represented many well-known and highly regarded Puget Sound based companies focusing primarily on real estate portfolio strategies. Sean’s specializes in portfolio assessment, financial analysis, strategic planning, lease acquisition and disposition, and investment sales. His expertise has been instrumental in assisting clients such as Clearwire, Fluke, and F5, develop and implement successful portfolio strategies throughout the world.

Prior to joining Cushman & Wakefield, Sean was Senior Vice President with Jones Lang LaSalle and the Staubach Company. Prior to joining Staubach, Sean spent five years as an Acquisition Director with Madison Realty Group, where he was responsible for the identification of property acquisition candidates, underwriting investment opportunities, analyzing re-positioning strategies, equity partnerships, and debt placement. While there, he successfully completed purchase and sale transactions totaling over three million square feet of office and retail properties.

Awards & Associations

  • Seven time National Top Performer, Jones Lang LaSalle
  • Two time #1 Producing Broker Seattle, Jones Lang LaSalle


  • Advanced Micro Devices
  • Boston Scientific
  • CBS Corporation
  • Cisco
  • Clear Channel
  • Clearwire
  • Ericsson
  • F5 Networks
  • Fluke Corporation
  • Great American Insurance
  • Goldman Sachs
  • HDR Engineering
  • Kimberly Clark
  • Lockheed Martin
  • Morgan Stanley
  • Terex
  • T-Mobile
  • United Healthcare
  • UW Medicine Clinics
  • XO Communication