Team

Meet the team behind Invaryant 

A little bit about us

We’re engineers, patients, mathematicians, health nuts, doctors, programmers, and creatives coming together to do something about a broken healthcare industry. We’re champions for personalized care plans, consumer-driven healthcare, freedom over our providers, and total ownership of our health.

Our Passion Projects:

Maternal Health

Our team’s efforts focus on improving women’s access to health tools, nutrition, better healthcare, education, and social services.

Healthy Generations

Being and raising the world’s healthiest generations starts with a lifelong health record, full family histories, and new genomics data.

Medical Errors

To end preventable medical errors, we’re equipping patients and doctors with the right health data when and where they need it.

Ramon Dempers

Founder & CEO

With over 30 years of experience in technology and Health IT and his entrepreneurial spirit, Ramon founded Invaryant after a family tragedy caused by a medical error. Since his early experience in large tech and pharma companies, he has had three successful exits from software companies he founded prior to Invaryant. This racecar lover keeps us all on our toes with his innovative ideas.

Nancy Hamlet

Marketing Consultant

Nancy has 20+ years of healthcare-marketing and executive-leadership experience that she leverages to help Invaryant drive business growth and accelerate customer adoption. Previously, Nancy served as global VP of marketing at Crawford & Company and as senior VP of marketing at Optum. In her free time, Nancy can be found driving her Atlanta Falcons-branded golf cart, hanging with her family, or cheering for any Georgia sports teams (even if they always let her down).

Dr. Steve Eisenberg

Chief Medical Officer

Dr. Eisenberg trained in internal medicine at Mount Sinai Hospital and completed his fellowship in cardiology at Emory University Hospital. He has since served as the Chief of Cardiology at Saint Joseph’s Hospitalfounded The Atlanta Heart and Vascular Research Group, served as a clinical trial principal investigator, and opened his private practiceComplete Cardiology. Dr. Eisenberg currently serves on the Heart and Vascular Institute Board of Trustees and is a fellow of the American College of Cardiology.  

Brian Keeton

Chief Technology Officer

With healthcare as his primary focus and passion, Brian brings 30 years of hands-on experience designing, implementing, and scaling enterprise software systems across multiple domains. He has led the architecture and software development teams for highly successful venture capital-backed companies acquired by SAP and UnitedHealth Group – Optum. Brian earned his bachelor’s and master’s degrees in Electrical Engineering from Georgia Tech. He has co-authored multiple books on software development technologies and best practices based on his experience as a developer and technology leader.

Sarah McGaughey

Quality Director

With a special interest in biology and a degree from the University of Georgia, Sarah began working at Invaryant in the spring of 2016. Trained in quality, Sarah leads the quality team and develops all quality tests and documentation, including validation documents and SOPs. In her spare time, she and her mutt Eddie enjoy exploring hiking trails around metro Atlanta.

Josiah Williams

Software Quality Engineer

Pursuing a Software Development degree at Georgia Gwinnett College, Josiah is the newest addition to the Invaryant team. As a member of the Quality team, he helps test the Invaryant software. He enjoys hiking with friends and family and is an avid gamer during his downtime.

Bethany Talmadge

Program Director, Clinical Operations

With her degree in Psychological Sciences from Georgia College & State University, Bethany has a decade of clinical and research experience and pursued additional studies in behavior analysis. A true Ravenclaw, Bethany compiles and conducts research, manages clinical operations, and supports business affairs. Invaryant’s resident foodie can be found exploring the city with her scruffy sidekicks (i.e., husband and pup).

Sam Gibson

Design Director

Sam is a skilled technical designer and writer who graduated from Southern Polytechnic State University and gained experience at Honeywell. She wears many hats, managing the functional design and documentation of the software and maintaining the Invaryant website with her creative flourish. In her occasional free moment, Sam enjoys crafting, baking, and spending time outside with her partner in crime (i.e., husband). 

Advisory Board

Dr. Steve Eisenberg

Dr. Steve Eisenberg

Chief Medical Officer

Dr. Eisenberg trained in internal medicine at Mount Sinai Hospital and completed his fellowship in cardiology at Emory University Hospital. He has since served as the Chief of Cardiology at Saint Joseph’s Hospital, founded The Atlanta Heart and Vascular Research Group, served as a clinical trial principal investigator, and opened his private practice, Complete Cardiology. Dr. Eisenberg currently serves on the Heart and Vascular Institute Board of Trustees and is a fellow of the American College of Cardiology.  

Ophir Frieder

Ophir Frieder

Chief Scientific Officer

Ophir Frieder is a Fellow of the American Association for the Advancement of Science (AAAS), Association for Computing Machinery (ACM), American Institute for Medical and Biological Engineering (AIMBE), Institute of Electrical and Electronics Engineers (IEEE), and the National Academy of Inventors (NAI), and a Member of Academia Europaea and the European Academy of Sciences and Arts. He was awarded the Association for Information Science and Technology (ASIS&T) Research in Information Science Award for medical informatics and the IEEE Edward J. McCluskey Technical Achievement Award for scalable information systems. Heavily involved with industrial efforts, he is a member of the biostatistics, bioinformatics and biomathematics faculty in the Georgetown University Medical Center and the computer science faculty at Georgetown University.

Robin Keen

Robin Keen

Business Advisor

Robin Keen retired from Johnson and Johnson (J&J) as the Global VP, Regulatory Operations. In this role, she led regulatory operations across J&J, and she created new approaches to drive accelerated submission and regulatory operations across the J&J pharmaceutical, medical device, and consumer businesses. Previously, Robin was the head of the Infectious Disease & Vaccines Therapeutic Area and Global Public Health Global Regulatory Affairs team. During her tenure in Infectious Disease, Robin led her teams through worldwide development, registration, and approval for new chemical entities and subsequent line extensions for HIV, Hepatitis C, and TB, in addition to the integration of the Crucell vaccines company into J&J.

Robin holds a BA in Biology from Douglass College – Rutgers University and a certification in Science Management. Robin lives in Florida with her husband; they enjoy spending time with their two daughters and granddaughters, “Airstreaming” around the country with their goldendoodles, and taking in all of the great entertainment that Florida has to offer.

Chris Kellogg

Chris Kellogg

Business Advisor

Chris Kellogg is Sr. Partner of Wallingford Partners LLC (WP), the successor firm to a company he founded in 1985, Wallingford Capital Corp. WP/WCC has completed the sale of 136 businesses in 34 states with sales aggregating to just under $1B. Mr. Kellogg serves on the boards of Elwyn, the nation’s oldest and largest 501c3 serving for those with Autism, Down Syndrome, or behavioral challenges, and Trend Health Partners LLC, a payment recovery specialist working on behalf of payors and providers within the healthcare reimbursement space.

Until its sale, Mr. Kellogg served as Board Member for StarCore Nuclear LLC, a start-up seeking to commercialize a revolutionary PBMR (pebble bed modular reactor) technology. Mr. Kellogg simultaneously received his BA/Arch. Design and his BS/Arch. Eng’g from Iowa State University in 1972. He lives near Rehoboth, DE with his wife of 49 years, Marsha. Together they’ve enjoyed extended ocean and Caribbean sailing aboard their sailboat, Watercolors. They are pickleball and bicycling enthusiasts and have two daughters and six grandchildren.

Linnette Sells

Linnette Sells

Medical Advisor

Dr. Sells has been practicing medicine in Atlanta since 1992, while also serving as an Olympic and Paralympic physician. Dr. Sells is board certified in Family Medicine and Sports Medicine, and is presently working as a team physician with Georgia Institute of Technology. She has served in the USAF as Chief of the Emergency Department at MacDill AFB and Homestead AFB during Desert Storm, has taught at several medical schools, and enjoys being a preceptor for students and residents in her practice.

Kelly Wilburn

Kelly Wilburn

Medical Advisor

Dr. Kelly Wilburn is a board certified pediatrician who has practiced in the Atlanta area since 2004. She received her undergraduate degree with honors from the University of Georgia, and then completed medical school and a residency in pediatrics at Baylor College of Medicine. Dr. Wilburn is a fellow of the American Academy of Pediatrics, and a member of the Academy’s Subcommittee on Adoption and Foster Care. Her special interests include adoption medicine and international health, adolescent medicine, and preventative health care.

Dr. Averel Snyder

Dr. Averel Snyder

Medical Advisor

Dr. Snyder is a cardiothoracic surgeon who is board certified in general surgery, critical care medicine, and cardiothoracic surgery. He practiced heart surgery for over 25 years and has an AMA certification in age management, an ISSA certification in fitness and nutrition, and several medical coding certifications (CRC, CDEO and CPC). In addition to his medical achievements, Snyder is also CMO and co-founder to the company streamlining Medicare Annual Wellness Visits—Vatica Health.

want to become part of the team?

We’re a team of innovators with a single focus: transform healthcare in the style of Uber, Netflix®, and AirBnB® to help people live healthier, happier lives. Our defining characteristic is our passion; we believe in what we’re doing because what we’re doing is going to create positive change in the world. We’re always looking for creative and collaborative colleagues to share our passion for creating a healthier world for future generations. Leave us your resume and contact information in the form below, and let us know why your passion is driving you to join our team.