Gregg graduated from the School of Industrial and Labor Relations and started his career at General Motors as an Executive-In-Training in Human Resources. While at Cornell, Gregg lived in U Hall 1, was in Kappa Sigma Fraternity, and earned a varsity letter with the Lightweight Football team. He received an Alpern Scholarship his senior year while completing an internship in NYC. He met his wife Joan Discepolo Popkin (Human Ecology ’79) while at Cornell. Their children are also Cornellians -- Jaclyn Popkin Frost (Human Ecology BS ’11, MS ’12) and Chelsea Popkin (Human Ecology BS ’13, MBA ’15).

Gregg went on to earn a MS in Real Estate Development from Columbia and completed a program in Executive Leadership at the Kennedy School at Harvard. He served as an Adjunct Professor at Columbia for 12 years, where he taught a graduate-level course in Asset Management within the Real Estate Development Program. Gregg has served on Advisory Boards of Cornell and Columbia as well as the Real Estate Board of New York and the Realty Advisory Board.

In his current role as President of RFR Realty, Gregg directs the daily activities of a private equity real estate firm with a multi-national portfolio of office, residential, retail and hotel properties including the Seagram Building and Lever House in NYC, as well as other notable properties in the US, Germany and Israel. 

Gregg began his real estate career under the guidance of his mentor, Harry B. Helmsley, and then worked in the development end of the business with John Tishman. He has had executive roles at Jones Lang LaSalle, CB Richard Ellis, and Beacon Capital.

Gregg has been an active supporter of various charitable organizations including Live Strong Foundation, Diabetes Research Institute, Cystic Fibrosis Foundation of South Florida and has been honored by the Muscular Dystrophy Association, Special Olympics New York, Diabetes Research Institute, Outreach Counseling Services, St. Dominics Home, Boy Scouts of America and AHRC.