Dr. Tressler is Chief Scientific Officer at Excellos. Previously he served as Chief Scientific Officer at the San Diego Blood Bank where he oversaw the Public Cord Blood Bank and Cell Therapy research and manufacturing programs. Previously he held leadership roles in Biotechnology companies, serving as head of Preclinical Oncology Research at Geron, Inc, overseeing their oncology and anti-aging research programs. He also was VP of Research and Development at Cellerant Therapeutics, heading up research and development efforts for stem cell and oncology programs. He has authored over 30 peer-reviewed scientific articles, book chapters and reviews as well as being inventor on several patents. Dr. Tressler has been invited to give numerous talks and lectures at Scientific and professional meetings and served as a chairperson and panelist at scientific symposia and meetings. His scientific focus is in stem cell biology, oncology and anti-aging research and he has served as a scientific advisor to various companies. He received his Ph.D. in Cancer Biology from the University of Texas Graduate School of Biomedical Science and his Master and Bachelor of Science degrees in Microbiology from McNeese State University. He is a member of the American Association of Blood Banks, The International Society of Cell Therapy and The American Society of Hematology.