Staff Directory

Mr. Loftin joined the Institute as an Audit Manager in April 1988, was promoted to Associate Director in May 2001 and appointed as Director in February 2006. Previously, he was employed by Manor Care, Inc., a national health care and lodging company, for five years—two years in the Internal Audit department and three years in health care operations, first as a regional controller and then a division controller. Prior to Manor Care, Mr. Loftin worked in the Towson, MD office of Clifton Gundersen & Co., a national CPA firm.

Mr. Loftin holds a B.A. in Economics and Business from Emory & Henry College and an M.S. in Management from University of Maryland University College. He has been a CPA since 1987 and a Certified Information Systems Auditor since 1994. Mr. Loftin is a member of the American Institute of CPAs, the Maryland Association of CPAs, and the Information Systems Audit and Control Association.  

Ms. Leo joined the Institute as an Audit Manager in November 1986. Previously, she was employed as an audit manager by the Marriott Corporation, a major hospitality and food service company. Prior to Marriott, she was an auditor and consultant in the Washington, D.C. office of Deloitte & Touche LLP, a multinational accounting and consulting firm.

Ms. Leo received her B.A. in Accounting from Towson State University in 1976 and her M.B.A. from the University of Maryland in 1977. She has been a CPA since 1979, and is a member of the American Institute of CPAs and the Maryland Association of CPAs.

Ms. Chang joined the Institute in 1988 and worked for three years as a contract auditor. In 2009 Ms. Chang returned to HHMI, employed as a Senior Internal Auditor. Previously, she was employed as an auditor in the Washington, D.C. office of BDO Seidman, an international public accounting and consulting firm.

Ms. Chang received her B.S. in Accounting from the University of Maryland in 1985, and she earned her M.B.A. from the Johns Hopkins University in 1996. She has been a CPA since 1988.

Mr. Popovich joined the Institute as a Senior Internal Auditor in June 2008. Previously, he was employed by Science Applications International Corporation (SAIC) in McLean, Virginia, and KPMG in Washington, D.C. He worked for SAIC for two years, first as a Senior Internal Auditor and later as a Compliance Manager.

In 2001 Mr. Popovich studied at the University of Wales at Swansea and interned with Lloyd's TSB Bank. Mr. Popovich earned a B.S. degree in Business Administration with a concentration in Operations Management in 2002 from the University of North Carolina at Wilmington. In 2004 Mr. Popovich earned a master's degree in Accounting from East Carolina University. He has been a CPA since 2007.

Mr. Sampson joined the Institute as a Senior Information Technology (IT) Auditor in July 2007. Previously, he was employed by the Washington Metropolitan Area Transit Authority (Metro) for 32 years. During his time at Metro he preformed duties for the internal audit, contract audit, and information technology audit sections of the Audit Department.

Mr. Sampson graduated from East Carolina University in 1972 with a B.S. degree in Business Administration. He has been a CPA since 1979 and a Certified Information Systems Auditor (CISA) since 1994.