Greg O'Brien

Greg O'Brien

Formal First Name

Greg O'Brien is Chief Executive Officer of Markets at JLL, a leading professional services firm that specializes in real estate and investment management. In his role, Greg is the Global Executive Board member responsible for strategic leadership and oversight of all regional and local market operations. He works closely with JLL’s clients and teams in cities around the world, helping tailor technology solutions for clients looking to use big data. Additionally, Greg is a member of the Global Executive Board with responsibility for strategic leadership and oversight of all regional and local market operations including the Leasing, Property and Asset Management, Consulting and Project & Development Services businesses. Greg has three decades of diverse career in commercial real estate. He has helped investors buy skyscrapers and shopping malls and worked with companies navigating lease agreements and large-scale renovation projects.

Professional Experience

Academic History


  • Greg drives productivity growth for the firm by implementing long term strategies, united by the common values of teamwork, integrity and excellence in client service. 

  • His focus is on delivering valuable solutions to clients, as they continue to drive growth for the firm and create opportunities for the people.

  • He came to JLL during the acquisition of The Staubach Company, where he was CEO, in 2008. In the decade plus since, he has held numerous senior leadership roles at JLL.

  • He started as CEO of the Americas in 2014 and assumed responsibility as CEO, Markets in January 2021.



  • Greg worked in technology for three years after earning an electrical engineering degree from Tufts University in 1984.

  • He shifted into the real estate industry after graduating from Harvard Business School with an MBA.

  • He is a strong believer in the value of education and has served on the board of directors of Teach for America since 2000.

  • He serves on the advisory boards for two private companies, Strategic Buildings Incorporated and Accustream.

  • He had served on the board of directors of the Greater Washington Board of Trade and the National Federation of Independent Business (NFIB).