Krupp is currently the director and chairman of Berkshire Income Realty, Inc. and a senior partner of Berkshire Realty Ventures, a private equity affiliate founded in 2010 by former Citi Group executive Larry Ellman. Douglas Krupp is one of several prominent Obama fundraisers involved in the private equity industry. In 1998, Krupp helped establish the Harborside Healthcare Corporation, a firm that owns and operates dozens of healthcare facilities across the country. He is currently a member of the Partners HealthCare system, a Massachusetts healthcare conglomerate poised to benefit from a Medicare provision coauthored by Sen. John Kerry (D., Mass.), to whom Krupp donated at least $2,000 in 2010.