Management Team

Anthony J. Cataldo

Anthony J. Cataldo

Chairman, Chief Executive Officer & President

Mr. Cataldo founded GT Biopharma Inc. upon joining the Board of Directors and subsequently Chairman and CEO in in July of 2014, where he changed the Company's profile with the inclusion of oncology assets. From February 2011 to June 2013 Mr. Cataldo served as Founder and Chairman/CEO of Iovance Biotherapeutics, Inc., (IOVA). Mr. Cataldo created the highly successful IOVA/Genesis with the inclusion of assets acquired from the National Cancer Institute for the treatment of stage four melanoma. Mr. Cataldo has extensive experience in the biotechnology sector having served as Chairman/CEO of several biotech companies including: Calypte Biomedical Corporation, and Senetek, PLC.

Jeffrey S. Miller, M.D.

Jeffrey S. Miller, M.D.

Consulting Chief Scientific Officer

Jeffrey S. Miller, MD, received a Bachelor of Science degree from Northwestern University in Evanston, Illinois and received his MD from Northwestern University School of Medicine. He completed an internship and residency in Internal Medicine at the University of Iowa in Iowa City. After completing a post-doctoral fellowship in Hematology, Oncology and Transplantation at the University of Minnesota, he joined the faculty in 1991. Dr. Miller is currently a Professor of Medicine at the University of Minnesota. He is the Deputy Director of the University of Minnesota Masonic Comprehensive Cancer Center. He has more than 20 years of experience studying the biology of NK cells and other immune effector cells and their use in clinical immunotherapy with over 170 peer-reviewed publications. He is a member of numerous societies such as the American Society of Hematology, the American Association of Immunologists, a member of the American Society of Clinical Investigation since 1999. He serves on the editorial board for Blood and is a reviewer for a number of journals and NIH grants.

Michael Handelman

Michael Handelman

Chief Financial Officer

Mr. Handelman served as Chief Financial Officer of Iovance Biotherapeutics, Inc. (IOVA), formally Lion Bio, from February 2011 until June 2015 and was a member of the Iovance’s Board of Directors from February 2013 until May 2013. Mr. Handelman became a Director of GoooGreen, Inc. in August 2020 and Chairman of the Board of Directors and Secretary in September 2020. He has served as Chief Financial Officer of Clickstream Corporation since October 2015. Mr. Handelman served as the Chief Financial Officer and as a financial management consultant of Oxis International, Inc., a public company engaged in the research, development and commercialization of nutraceutical products, from August 2009 until October 2011. From November 2004 to July 2009, Mr. Handelman served as Chief Financial Officer and Chief Operating Officer of TechnoConcepts, Inc., formerly a public company engaged in designing, developing, manufacturing and marketing wireless communications semiconductors, or microchips. Prior thereto, Mr. Handelman served from October 2002 to October 2004 as Chief Financial Officer of Interglobal Waste Management, Inc., a manufacturing company, and from July 1996 to July 1999 as Vice President and Chief Financial Officer of Janex International, Inc., a children’s toy manufacturer. Mr. Handelman was also the Chief Financial Officer from 1993 to 1996 of the Los Angeles Kings, a National Hockey League franchise. Mr. Handelman holds a degree in accounting from the City University of New York.

Martin Schroeder

Martin Schroeder

Chief Technology Officer

Mr. Schroeder was appointed CTO of GT Biopharma, Inc. in April of 2019. Mr. Schroeder has been Executive Vice President and Managing Director of the Emmes Group, Inc., a strategic advisory firm. Prior to joining the Emmes Group, Mr. Schroeder held a number of industry management and executive positions, including Chairman, President and Chief Executive Officer of AMS, Inc., a venture capital-backed molecular genomics company. From August 2007 through April 2008, Mr. Schroeder was a member of the Board of Directors of Global Clean Energy Holdings, Inc., a public company engaged in the development of nonfood-based bio-fuel feedstock. Mr. Schroeder also played key roles in the founding of Intercept Pharmaceuticals, a public biotech company focused on the treatment of patients with progressive non-viral liver diseases, and the founding of Iovance Biotherapeutics, a public company developing cell therapy products. Mr. Schroeder was also a Visiting Scientist at the U.S. Department of Agriculture following completion of his graduate studies in biochemistry. 

Mr. Schroeder holds a Bachelor of Science degree in Biochemistry from the University of California Los Angeles, and a Master of Science degree in Biochemistry from California State University, Long Beach.

Gregory Berk, M.D.

Gregory Berk, M.D.

Chief Medical Officer

Dr. Berk brings over 30 years of experience and expertise in oncology drug development across medicine, industry and academia. He joins GT Biopharma's management team from Celularity, where he served as Chief Medical Officer, responsible for the company's oncology, infectious and degenerative disease programs. Previously, he served as Chief Medical Officer of Verastem; President, Chief Medical Officer, and Board Member of Sideris Pharmaceuticals; Chief Medical Officer of BIND Therapeutics, and Chief Medical Officer of Intellikine, which was acquired by Takeda/Millennium. Prior to his roles as Chief Medical Officer, Dr. Berk was Senior Vice President of Global Clinical Development at Abraxis BioScience, where he was responsible for the Company's overall clinical strategy, including efforts to expand the indications for its lead clinical program, Abraxane®, as well as oversee the clinical development of its clinical pipeline. Dr. Berk also served on the integration leadership team during the Celgene, $3.7 Billion acquisition of Abraxis in 2010.

Dr. Berk obtained his medical degree from Case Western Reserve University and completed his internship, residency, and fellowship in internal medicine, hematology, and medical oncology at the Weill Medical College of Cornell University and New York Presbyterian Hospital, where he also served as a faculty member from 1989-2004. During this time, Dr. Berk served as an investigator on several industry-sponsored and cooperative group oncology clinical trials, including the pivotal trials for Gleevec® and Avastin®.