Senior Management

Scott Koenig, M.D., Ph.D.
President and CEO and Director

Dr. Koenig has been our President, Chief Executive Officer and a director since September 2001 and was one of our co-founders. Prior to joining MacroGenics, Dr. Koenig served as Senior Vice President of Research at MedImmune, Inc., where he participated in the selection and maturation of its product pipeline. From 1984 to 1990, he worked in the Laboratory of Immunoregulation at the National Institute of Allergy and Infectious Diseases at the National Institutes of Health, where he investigated the immune response to retroviruses and studied the pathogenesis of AIDS. Dr. Koenig currently serves as a member of the Board of Directors of GlycoMimetics, Inc., a publicly held company. Additionally, Dr. Koenig serves on the Board of Directors of the International Biomedical Research Alliance and the Biotechnology Innovation Organization (“BIO”). Dr. Koenig previously served as Chairman of the Board of Directors of Applied Genetic Technologies Corporation until its acquisition in 2022. Dr. Koenig received his A.B. and Ph.D. from Cornell University and his M.D. from the University of Texas Health Science Center in Houston. We believe that Dr. Koenig’s detailed knowledge of our company and his over 30 years in research and the biotechnology industry provide a valuable contribution to our Board.

James Karrels
Senior Vice President, Chief Financial Officer and Secretary

Mr. Karrels, Senior Vice President, Chief Financial Officer and Corporate Secretary, joined us in May 2008 and has over 25 years of experience in finance, with a significant portion of that time working for, or on behalf of, life sciences companies. Prior to joining us, he served as Executive Director of Finance at Jazz Pharmaceuticals, Inc., where he was responsible for the company’s financial planning and analysis and investor relations activities. Prior to joining Jazz Pharmaceuticals, Mr. Karrels was in the Global Healthcare Investment Banking Group at Merrill Lynch, serving most recently as a Director. Mr. Karrels holds an M.B.A. from Stanford University and a B.B.A. from the University of Notre Dame.

Ezio Bonvini, M.D.
Senior Vice President, Research and Chief Scientific Officer

Dr. Bonvini, Senior Vice President, Research and Chief Scientific Officer, joined us in June 2003.  From 1985 to 2003, Dr. Bonvini was with the FDA in the Center for Biologics Evaluation and Research, or CBER, which is responsible for regulating therapeutic monoclonal antibodies and other proteins, ultimately serving as Acting Deputy Director, Division of Monoclonal Antibodies and Chief, Laboratory of Immunobiology. From 1982 to 1984, Dr. Bonvini was a Visiting Fellow at the National Cancer Institute at the National Institutes of Health. Dr. Bonvini received a Diploma in Science from the Scientific Lyceum in Genoa, Italy, and his M.D. and Specialty Certification in Clinical Hematology from the University of Genoa, School of Medicine.

Stephen Eck, M.D., Ph.D.
Senior Vice President, Clinical Development & Chief Medical Officer
Stephen Eck

Stephen Eck, M.D., Ph.D., Senior Vice President, Clinical Development & Chief Medical Officer, joined us in July 2020. Prior to MacroGenics, Dr. Eck served as chief medical officer of Immatics US, a company focused on TCR-based immunotherapies, and as president and chief executive officer of Aravive Biologics. Prior to these roles, Dr. Eck was Vice President and Global Head of Oncology Medical Sciences at Astellas Pharma, managing a portfolio of assets which included enzalutamide (Xtandi®), erlotinib (Tarceva®) and gilteritinib (Xospata®). Dr. Eck has also held leadership positions in drug development as Vice President of Translational Medicine and Pharmacogenomics at Eli Lilly and as Head of Clinical Oncology at Pfizer. He began his professional career at Monsanto in cancer target discovery and later joined the University of Pennsylvania, where he was the Anne B. Young Assistant Professor of Cancer Research and the Director of the Cancer Gene Therapy Program. Dr. Eck currently serves as a director for Circulogene, and on the boards of directors for the Personalized Medicine Coalition and the Central Pennsylvania Clinic. Dr. Eck previously served on the Board of Luminex Corporation. He is a Fellow of the American Association for the Advancement of Science. Dr. Eck holds a B.A. from Kalamazoo College, an M.S. and a Ph.D. from Harvard University, and an M.D. from the University of Mississippi School of Medicine with Residency and Fellowship training at the University of Michigan.

Eric Risser
Chief Operating Officer

Mr. Risser, Chief Operating Officer, joined us in March 2009. Prior to joining us, Mr. Risser held the position of Senior Director, Business Development in the pharmaceutical group at Johnson & Johnson, where he worked from 2003 to 2009. Before Johnson & Johnson, Mr. Risser started and built a consulting practice that provided counsel to emerging life science companies in the United States and Europe. Earlier in his career, Mr. Risser held venture capital and investment banking positions with BA Venture Partners and Lehman Brothers Holdings Inc., respectively. Mr. Risser holds an M.B.A. from Stanford University and a B.A. from Yale University.

Tom Spitznagel, Ph.D.
Senior Vice President, Technical Operations

Dr. Spitznagel, Senior Vice President, Technical Operations, joined us in 2013. He has overall responsibility for biopharmaceutical development and manufacturing of MacroGenics’ Fc-optimized monoclonal antibodies, DART® molecules, and Antibody Drug Conjugates, as well as supply chain, CMC project management, facilities and engineering. Prior to joining us, he was at Human Genome Sciences, most recently serving as Vice President of BioPharmaceutical Development, where he was responsible for oversight of Analytical Development, Formulation and Drug Delivery, Purification Sciences, and Fermentation and Cell Culture Sciences. Prior to joining HGS, Dr. Spitznagel was a Senior Scientist at Nabi from 1996-1998, and a Staff Engineer at Genetics Institute from 1992-1996. Dr. Spitznagel earned his BS in Chemical Engineering at M.I.T, and his Ph.D. in Chemical Engineering at the University of California, Berkeley.

Lynn Cilinski
Vice President, Controller and Treasurer

Ms. Cilinski, Vice President, Controller and Treasurer, joined us in October 2003. Prior to joining us, Ms. Cilinski spent a year as a consultant to various companies providing services to the government. Prior to that, she spent more than 20 years with Covanta Energy Inc. (formerly Ogden Corporation) where she held the position of Corporate Controller for four subsidiary companies that provided services to the federal government. Ms. Cilinski holds a B.S. from Strayer University.

Jeffrey Peters
Senior Vice President, General Counsel

Jeffrey Peters, Senior Vice President, General Counsel, joined us in August 2015. Before joining MacroGenics, Mr. Peters most recently served as Deputy General Counsel, Health, for the Biotechnology Innovation Organization (BIO), the leading national trade association for the biotechnology industry. While at BIO, Mr. Peters served as the primary legal counsel on health regulatory and related matters, including legal and policy matters affecting all aspects of biopharmaceutical product discovery, development, and delivery. Prior to BIO, Mr. Peters was with MedImmune, the global biologics arm of AstraZeneca. From 2005 through 2013, Mr. Peters had positions of increasing responsibility in the MedImmune legal department, culminating as Vice President and Deputy General Counsel. Mr. Peters was in private practice for almost a decade, joining MedImmune from the life sciences practice group at Latham & Watkins LLP, in Washington, D.C. Mr. Peters holds a J.D. from the University of Pennsylvania Law School and a B.A. in both Politics and Literature from Brandeis University.