Bill Andrews, Ph. D.
President & CEO
Dr. Bill Andrews is the President and CEO of Sierra Sciences. As a scientist, athlete and executive, he continually pushes the envelope and challenges convention, He has been featured in Popular Science, The Today Show and numerous documentaries on the topic of life extension including, most recently, the movie The Immortalists in which he co-stars with Aubrey de Grey.
Since 1981, Bill Andrew has focused on finding ways to extend the human lifespan and healthspan through telomere maintenance. As one of the principal discoverers of both the RNA and protein components of human telomerase, Dr. Andrews was awarded 2nd place as "National Inventor of the Year" in 1997. He earned his Ph.D. in Molecular and Population Genetics at the University of Georgia in 1981. He has served as Senior Scientist at Armos Corporation and Codon Corporation, Director of Molecular Biology at Berlex Biosciences and at Geron Corporation, and Director of Technology Development at EOS Biosciences. He is also a named inventor on over 50+ US issued patents on telomerase and author of numerous scientific research studies published in peer reviewed scientific journals. Bill is also an avid ultra-marathon runner. Born December 10, 1951, he regularly competes in 100k and 100+ mile runs often finishing at the top of his age group. These grueling races have taken him all over the world to race in some of the most extreme environments, from Death Valley to the Himalayas. His running is presently featured in the movie The High.
Laura A. Briggs
Ph. D. Vice President of Research and Discovery
Laura Briggs received her B.S. degree in Nutrition in 1993 and her Ph.D. in Environmental Science and Health in 2000 from the University of Nevada, Reno. After a one-year post-doctoral position at UNR she joined Sierra Sciences in 2001. In addition to coordinating research and development at Sierra Sciences, Dr. Briggs is also currently serving as the biology Lab Coordinator for Truckee Meadows Community College (TMCC) and has collaborated on research projects at the V.A. Medical Center in Reno, Nevada.
M.D. Medical Liaison
Salvatore Cumella, M.D., is the Executive Vice President of LENCO Diagnostic Laboratory and the President and CEO of Cumella Professional Services, a public relations and consulting firm, He received his B.A. in Biology from George Washington University and graduated from the University of Monterrey Medical School. Dr. Cumella's career has focused on community service by being involved as a political fundraiser and community activist. He has been the recipient of numerous honors and awards, including the Ellis Island Medal of Honor and "Man of the Year" for Italian Charities of America and the Federation of Italian-American Organizations. He was founder and president of Careers Thru Education, a private corporation devised to further educate students in medical allied health programs; he has served on the Board of the Forum's Children of the World Foundation; and he now serves on the Executive Boards of ABRUD (American Brotherhood for the Disables) and SUB-B (Senior Umbrella Network of Brooklyn).
Director of Business Development
Jonathan Greenwood (Park) is Director of Business Development and CEO of Defytime Holdings Ltd., a Global marketing and trading company. After graduating from Architecture University, he became an entrepreneur between Antipodean and East Asia. In his 15 years global marketing sales experience, he built excellent clients from the Asian markets and a large network in the Southeast Asia market. His management skills and understanding of the region adds tremendous value in making Defytime & Sierra Science a world class anti-aging destination.