Executive Team

Carlos Montesinos

Chief Executive Scientist

Carlos is a molecular biologist, formulation scientist, and a highly regarded speaker in the medical and nutritional education world. He is sought-after for his scientific excellence, ethics and sincerity. In addition to being awarded a Space Act Agreement by NASA, he's had the honor of consulting, collaborating and speaking at organizations such as The New York Academy of Medicine and The Royal Society of Medicine in the United Kingdom, among others. He is a member of the American Association of Pharmaceutical Scientists.

Carlos was also one of the youngest professional tennis umpires in the history of the sport. He enjoys gourmet cooking and international travel. He lives in Houston, a convenient location to advance promising research with the Space Program

Brad Stevenson

Executive Vice-President

Brad's expertise and passion lie in organizational and individual performance. He has advised, coached and led top businesses, healthcare providers and corporate wellness organizations.

Starting his career at The Boston Consulting Group, Brad is a seasoned business executive, strategist and corporate development professional who has excelled in market development projects for companies large and small.

He lives in the mountains of Colorado, a cradle of elite level and extreme sports. Brad is an avid backcountry explorer, mountain biker, skier and kite-boarder

Leigh Fernandez

Director of Operations & Customer Experience

If you ever wondered what makes Nugevity’s wheels spin, the answer is Leigh. She is the one essential figure in the totem pole. As an entrepreneur, Magna-Cum-Laude graduate of Southern Methodist University, process development expert, internet media connoisseur, and decade-long user of Nugevity products, few people are better suited to getting the job done. Leigh has been servicing many of our customers with a smile since 2003.

Peter Umekubo

Director of Business Development

Peter brings an impressive background that combines scientific research in biotechnology, along with a passion for business analysis and commercial development. With advanced science degrees from CUNY, NYU, and an MBA from the University of Colorado Business School, Peter most recently served as Commercial Operations Director and Business Analyst for a well-known pharmaceutical multinational. Before that, he spent years as a biotechnology investigator, and authored or co-authored a variety of articles in peer-reviewed journals.

Scientific Team & Collaborators

Marwan Sabbagh, MD, FAAN, CCRI

  • One of the world’s leading experts in Alzheimer's disease and dementia
  • Director of Memory Disorders Division at Barrow Neurological Institute
  • Professor of Neurology, University of Arizona College of Medicine
  • Over 200 peer reviewed scientific publications. Senior editor for the Journal of Alzheimer’s Disease and Clinical Neurology. Author of several top-selling books and texts on Alzeimer’s Disease

COL Michael Lewis, MD, MPH, MBA, FACPM (US Army, Ret.)

  • Founder of the Brain Health Education and Research Institute
  • Fmr Director of Epidemiology, Uniformed Services University School of Medicine. Trained at Johns Hopkins University and Walter Reed Institute of Research. Graduate of US Military Academy at West Point
  • Developed omega-3 nutritional protocol for US soldiers and military personnel at risk of brain injury and PTSD
  • Medical Director of BrainCARE, a Potomac, MD-based center specializing in the integrative treatment of brain injuries

LTC Daniel Johnston, MD, MPH

  • Medical Director, US Army - ArmyFit Program
  • Former White House Medical Aide to the U.S. President and First Lady
  • Founder of StratCam LLC, a scientific research, education, formulation and PR firm

Timothy Schneider, MD

  • Board Certified Ophthalmologist, Surgeon and Clinical Researcher
  • Trained at The Mayo Clinic and Johns Hopkins University
  • Published papers on ophthalmic research and surgical techniques

Bradley W. Greider MD, MS, FACS

  • Stanford School of Medicine
  • Fellow, American Academy of Ophthalmology
  • Residency - Jules Stein Eye Institute at UCLA

Todd Sheldon. OD, MBA

  • Class valedictorian, University of Houston College of Optometry
  • Naval Staff Optometrist, directing vision correction programs for fighter pilots

Michael Cohen

  • Two time US Olympic Weightlifting Head Coach
  • Founder, Team Savannah - Only American coach with athletes medaling at all of the following: Olympics; Pan-Am Games and Championships; Jr., Sr. and Master Worlds

Mary Vacala, MSPAS, MS, ATC

  • Trainer to US Olympic Teams, including Women's Volleyball, Basketball, Wheelchair Basketball teams; Men's Weightlifting and Wheelchair Basketball.
  • Professor, South University. Fmr President, Georgia Association of Physician Assistants


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