Management Team

David Zaccardelli Pharm.D., Acting Chief Executive Officer

From 2004 until 2016, Dr. Zaccardelli served in several senior management roles at United Therapeutics, including chief operating officer, chief manufacturing officer and executive vice president, pharmaceutical development and operations. Prior to joining United Therapeutics, Dr. Zaccardelli founded and led a startup company focused on contract pharmaceutical development services, from 1997 through 2003. From 1988 to 1996, Dr. Zaccardelli worked at Burroughs Wellcome & Co. and Glaxo Wellcome, Inc. in a variety of clinical research positions. He also served as director of clinical and scientific affairs for Bausch & Lomb Pharmaceuticals from 1996 to 1997. Dr. Zaccardelli received his Doctor of Pharmacy degree from the University of Michigan.

Mark W. Hahn, Executive Vice President and Chief Financial Officer

Mr. Hahn has over 25 years of experience as a senior financial executive in biotechnology and high technology companies.  he has conducted over $500 million in financial transactions for both public and private companies.  Prior to joining Cempra, Mark was CFO of Athenix Corp., a leading agricultural biotechnology company where he led the company in its $400 million merger with Bayer CropScience.  He previously was the CFO of several rapidly growing technology companies including BuildLinks, Inc. and Charles & Colvard, Ltd., where he led the growth of the firm from three to 75 employees and spearheaded that company's IPO.  Mark began his career with Ernst & Young.  Mr. Hahn holds a Bachelor of Business Administration degree in Accouning and Finance from the University of Wisconsin-Milwaukee and is a Certified Public Accountant in the State of Maryland.

David Oldach, M.D., FIDSA, Chief Medical Officer

David Oldach joined Cempra Pharmaceuticals in 2011. Between 2006 and 2011, Dr. Oldach directed clinical research at Gilead Sciences, Inc., where his drug development experience ranged from IND/first-in-human trial development and execution through NDA-supportive Phase 3 protocol development and execution. Dr. Oldach received his Medical Degree, Magna Cum Laude, from the University of Maryland School of Medicine and completed a residency in Internal Medicine at the Massachusetts General Hospital. He completed an Infectious Disease Fellowship at Johns Hopkins University School of Medicine, serving under John Bartlett. His academic clinical research included studies in community-acquired pneumonia and surgical infections, as well as HCV pathogenesis. At the time of his transition from academic medicine to industry, Dr. Oldach was a tenured Associate Professor of Medicine at the University of Maryland School of Medicine and served as the Infectious Diseases Section Chief in the Baltimore Veterans Administration Hospital. 

John Bluth, Executive Vice President, Investor Relations and Corporate Communications

Prior to joining Cempra, Mr. Bluth headed investor relations and corporate communications for two of Silicon Valley’s leading biotechnology companies, CV Therapeutics, which was acquired in 2009, and Aviron, which was acquired in 2002. Before joining Aviron, Mr. Bluth led the west coast healthcare practice for Fleishman-Hillard, an international public relations firm. From 2009-2012, he was senior vice president of investor relations and group communications at German-based Elster Group, one of the world’s largest electricity, gas and water measurement and control providers. Mr. Bluth served as a member of Elster’s group executive board and built the investor relations and corporate communications functions for the company through its initial public offering in 2009. Elster was acquired in 2012. From 2012 through mid-2016, Mr. Bluth was senior vice president of investor relations and corporate communications and served on the executive committee at PowerSecure International, Inc., a leading provider of energy technologies and services to electric utilities and their large industrial, commercial, institutional and municipal customers. PowerSecure was acquired in May 2016. Mr. Bluth holds a Bachelor’s degree in physiology from Cornell University.

David Pereira, Ph.D., Senior Vice President of Chemistry

Dr. David Pereira has over 20 years of experience in the pharmaceutical and biotechnology industries. Prior to joining Cempra, he was a Director in the Synthesis Group of Cardinal Healthcare, where he was responsible for the process development of numerous drug candidates. He previously held positions at Baxter Healthcare in their IV Systems Division, Hemoglobin Therapeutics Group and the Corporate Research and Technical Division. He worked in parenteral drug development, medical product development and hemoglobin-based oxygen carrying solutions. Dr. Pereira earned his B.S. degree in Biochemistry from Virginia Tech followed by a Ph.D. in Medicinal Chemistry from Virginia Commonwealth University. He continued his training as a post-doctoral fellow at the University of Illinois.