Mark Semler


As the CEO of a cutting-edge medical device company, I lead a team bringing a nonintrusive glucose monitoring wristband for diabetics. I bring over 20 years of experience in the medical device industry as an executive, R&D leader, and engineer. Before Joining Alertgy, I lead ZIAN’s efforts to advance patient-first innovations, bringing to market life-saving, class-leading technologies inspired by clinicians working in 25+ departments and 6 colleges at the Medical University of South Carolina. Our collaborative, data-driven approach has culminated in an 85%+ licensing rate to major commercial partners, with over 60 issued or pending patents and 3 FDA-approved devices on the market.Before joining ZIAN, I was the VP of R&D for Orthofix’s $140M spinal implants division, leading a 30-member team of engineers, designers, and machinists in the end-to-end development and commercialization of dozens of novel spinal implant systems. A lifelong technologist and trained mechanical engineer, I was an early adopter of 3D printing – a sophisticated tool we now rely upon at ZIAN and in complex surgical procedures at MUSC – and began my career at Boston Acoustics, where I integrated 3D printing and 3D CAD technologies into its consumer electronics manufacturing process, expediting R&D throughput three-fold.

Dr. John Burd


Dr, Burd is the Chief Innovation Officer for Alertgy and has sat on the Board of Alertgy since 2018 and is responsible for advising the company on technologies and in strategic decision making. Dr. Burd was a founder and first CEO of DexCom, Inc. (NAS: DXCM), which develops, manufactures, and distributes CGMs for people with diabetes, eliminating the need for fingerstick blood samples. He has also actively developed products for Miles Laboratories and has served as Chief Operating Officer of MAST Immunosystems; Vice President of Research and Development at Quidel; Founder and CEO of LXN, which funded, developed, patented and marketed a unique home-use produce for people with diabetes; General Partner at Windamere Venture Partners; Founder and CEO of Oculir, Inc.; and Founder and CEO of Sabur Technology, Inc, which developed a noninvasive CGM with a strategic partner. He most recently launched his fifth company, Lysulin, which is a natural supplement formulated to help lower glucose toxicity. He holds a PhD in Biochemistry from the University of Wisconsin, Madiso and is also CEO of Wonder Spray LLC at

Alex Radetich


Alex Radetich serves in a dual role at Alertgy, as director on the company’s board of directors and Chief Business Development Officer, spearheading company’s business development efforts. He is also one of the early investors in the company. A graduate of Amherst College and University of Kentucky Patterson School, Alex is a serial entrepreneur with experience in international business, medical device marketing and consumer data marketing. After a successful sales career at Equifax Direct Marketing services, Alex co-founded Take 5 Solutions, a database marketing company that focused on unique direct marketing channels and pioneered several CRM and consumer acquisition data products. Throughout his career Alex worked with a leading Fortune 500 companies and over a span of 20 years became a well-respected and trusted expert in database marketing. When not working, Alex enjoys spending time with his family, traveling and contributing to charitable causes.

Marc E. Rippen


Marc is an experienced and highly skilled technical engineer with over 30 years of experience. He has worked for multiple fortune 500 companies, Department of Defense (DOD), NASA, SOCOM, and DARPA commercializing dozens of ground-breaking and revolutionary technologies. He holds various degrees across multiple interrelated disciplines including: Microbiological Sciences and Immunology, Biophysics, Analytical Chemistry, Masters of Aeronautical Science, and Management of Engineering and Technology.

John Hubert


John started with Alertgy as its VP of Engineering directing the engineering team in the development of two generations of DeepGluco® Continuous Blood Monitoring and Alert Systems. He is a proven technically savvy entrepreneur and was part of a team who spun-out a commercial start-up company from Lockheed Martin helping to provide the military a dual use for their technologies by transferring military technologies into off-the-shelf products for non-military applications. While at Lockheed Martin, he was awarded the coveted “Apex” award when his team successfully developed an innovative High-Power Quasi-Optical amplifier for DARPA. He designed numinous Monolithic Microwave Integrated Circuits enabling system miniaturization, published several papers/patents, and co-authored an Engineering textbook. He earned an accelerated MS in ECE from UMass sponsored by Varian Associates.

Craig R. Nelson


Craig is a savvy manufacturing engineer. He brings technologies from the laboratory to the market. He is an expert in automated industrial manufacturing processes, and a serial entrepreneur with a career based on establishing and managing technology companies spanning semiconductor thin film deposition, automated industrial and robotic manufacturing systems, and polymer lithium-ion battery development and production. Craig holds a BS in Physics from Washington & Lee University and has participated in over 12 start-up ventures in his career.

John W. Hodges Jr.


John has a BS in EE from the Citadel and is the principal electrical engineer and subject matter expert in RF technologies. He was awarded the SRI “Gold Nugget” award in 2013 for thinking outside the box and inventing paradigm shifting technologies many of which are patented today.