[2] Reinstein is the founder and chairman of Regent, a multi-sector private equity firm.
Reinstein started his career as an intern under former President Ronald Reagan and later worked at ICM Partners.
He is currently the chairman of several Regent businesses, including Escada,[3] La Senza, Sassoon, Regis Salons, Supercuts UK, Lillian Vernon[4] and Sightline Media Group.
[7] Reinstein is also the founder of the Military Charity Organization, a Washington D.C.–based non-profit that operates the Service Members of the Year Honors Program.
He is a member of the Young Presidents' Organization and has served on several private and public company boards including Pegasus Solutions,[8][9] and NexTag as well as the Australian Stock Exchange listed technology company Structural Monitoring Systems.