3D HoloGroup - 3DHG Greg

Greg Partin – Co-Founder and CEO

Greg has over 20 years of experience in the field of software development of enterprise systems and has held numerous leadership positions in several diverse technology companies including Fortune 500.  Greg holds a Bachelor’s degree in Computer Science from Bowling Green State University and a Master’s degree in Computer Information Systems from Nova Southeastern University. Greg has developed several Augmented Reality applications including “Best in Category”. His vision is to help bring Augmented Reality to the world for everyday use.


Tom Sablyar – Co-Founder and CTO

Tom joined 3D HoloGroup with a vision that augmented reality can become a reality for all.  Tom brings over 20 years of experience in the technology, banking, law, retail, finance, and product manufacturing industries.  Prior to joining Tom was a consultant for several Fortune 100 firms that were devoted to technology and telecom.  Tom has owned several companies and founded several startups including Linisi and media conglomerate New Media Group.  Tom also is president and vice-president of several non-profits and has the pleasure of serving as board member of two others companies.


Mario L. Castellanos – Co-Founder and COO

Mario has over thirty five years of corporate environment and start-up experience in several technology and non-tech sectors including AI, Gamification Technology, Broadcasting and Media, Telecommunications, Security Systems, Energy, Sports, Employee Empowerment, and others. Prior to 3D HoloGroup, Mario was President and owner of New Ventures Technologies, a business services and business processes hands-on consulting company specializing in change management, business analysis, training, operations, sales, marketing and business development. In addition, Mario is an advisor for three investment and advisory investment firms and Board Advisor for two others.










Ronald T. Linares – Financial Board Member

Experienced Chief Financial Officer with a demonstrated history of working in the
SaaS software, life sciences, restaurant and residential contracting industries. Strong finance professional skilled in Strategic Planning, Management Consulting, Financial Analysis, Financial Reporting, Business Strategy, Start-ups, and Mergers & Acquisitions, budgeting and forecasting, forecasting and Project Management.



Jay W. Pettegrew, M.D. – Science Technology & Medical Advisor

Dr. Pettegrew’s highly distinguished and internationally recognized career as a scientist, M.D. tenured Professor, US  Navy Lieutenant commander (LCDR, MC, USNR), and patented inventor spans more than 45 years. His expertise includes neurochemistry/neurophysics and the development and application of magnetic resonance spectroscopic imaging (MRSI) and magnetic resonance imaging (MRI) in neuropsychiatric disorders. His experience further includes the application of in vitro and in vivo MRSI/MRI methods to normal brain development and aging, Alzheimer’s disease, alcoholism, autism, major depressive disorders, and schizophrenia. He is a member of sixteen national and international scientific societies including being elected a Fellow of the American Academy of Neurology (1987), The American Psychopathological Association, Inc., and the Royal Society of Medicine (England) and has over 300 publications in peer-reviewed scientific journals related to his research. He has been a reviewer for seventeen international scientific journals and has been invited to give over 100 national and international lectures. He has been a recipient of continuous NIH research funding since 1989 and has been an extra-mural NIH grant reviewer since 1984.