Our team has over 100 years of experience in healthcare.


John Daniel – Chief Executive Officer

John has worked in the tissue transplant field for nearly 25 years and has been influential as a leader and innovator. In working with many start-up companies, he’s participated in several mergers, acquisitions and IPOs. John accepted his first executive position, Executive Director at Tutogen Medical, at age 28. He has played a significant role developing and launching new technologies across many different surgical applications. In 2002, John created a consultancy business to aid companies in maintaining compliance with FDA regulations. John’s second company, Surgical Biologics, founded in 2006, created a new type of biologic implant derived from donated placental tissue. These products were the first of their kind, and are still considered the gold standard of placental based products. Surgical Biologics was sold to MiMedx Group (MDXG) in 2011, and using mostly Surgical Biologics’ products, MiMedx has grown to over a $1 Billion market cap. John has been granted 26 patents related to Human Cell and Tissue based Products (HCT/P) from the US Patent and Trademark Office, with more applications pending with the USPTO, including several applications assigned to StimLabs. Before starting his career in the tissue transplant industry, John served in United States Marine Corps.


Sarah Griffiths PhD – Vice President of Product Development

Dr. Griffiths has over 11 years of experience in tissue engineering and regeneration medicine. Before joining StimLabs, Sarah was the Global Technical Application Scientist for the Cell Therapy Group at Irvine Scientific. As a founding member, Dr. Griffiths not only helped to develop the cell therapy business but was also responsible for fully characterized justifications on new product ideas and market assessments for proposed products. At the Georgia Institute of Technology Sarah was a Senior Research Scientist within the Stem Cell Engineering Centre. Prior to that she performed post-doctoral research as part of the NSF Science & Technology Center, EBICS and in collaboration with the Emory Personalized Immunotherapy Center. Sarah holds a Ph.D. in Medical Devices from the University of Strathclyde, Glasgow and a master’s degree in Mechanical Engineering from Brunel University, London. Dr. Griffiths has published over 8 peer reviewed journal articles and has several applications pending with the USPTO related to Human Cell and Tissue based Products (HCT/P). During 2014-2015, Sarah served as a committee member on the Process and Product Development sub-committee for the International Society for Cellular Therapy.


Melissa Gaynor O’Connor – Vice President of Quality Assurance & Regulatory Affairs

Melissa Gaynor O’Connor, M.S., RAC, CTBS has 17 years of experience in medical device, combination product, and human tissue new product development research, engineering, and commercialization. She has over 6 years of experience in Quality System design, implementation, maintenance, and compliance. Prior to joining StimLabs, Melissa held Quality leadership positions serving as the Management Representative, Head of Quality, and Official FDA correspondent for prescription eye-glass lens manufacturer QSpex Technologies, Inc., and Chemence Medical Products, Inc., a global manufacturer of adhesive based Class II medical devices for wound closure. During her 11 year tenure with Kimberly-Clark Health Care, Melissa held positions in Regulatory Affairs, Product Development, and Process Engineering. In addition to Quality Systems expertise, Melissa is skilled at developing comprehensive regulatory strategies to support new product development including pre-market approval requirements for the U.S and E.U. She is a member of the Regulatory Affairs Professional Society (RAPS) and holds an active RAC certification. Melissa holds a BS degree in Biological Sciences from the University of Georgia and a MS Degree from the University of Georgia School of Pharmacy in Biomedical and Pharmaceutical Regulatory Affairs. Melissa joined StimLabs in February 2016.


Chas Harris – Vice President of Marketing and Clinical Development

After graduating from the University of South Carolina with a double major in Finance and Marketing, Chas started his healthcare career in 2010 with a start-up company in the minimally invasive spine surgery market. In his sales and marketing capacities, Chas expanded the company’s global presence by developing international distribution networks, training surgeons, and launching new products in ten European and Latin American markets. In 2012, Chas joined Mölnlycke Health Care where he managed a range of innovative products across both surgical and wound care divisions of the organization, including the fastest growing line of advanced wound care products. Chas joined StimLabs in June 2016 to help bring multiple regenerative biologic products to market.


Tom Gilbert – Director of Wound Care Sales

Tom has 24 years of experience in the medical field, 11 of them spent as a Critical Care Registered Nurse at Grady Hospital and 14 years in sales and sales management in the specialties of soft tissue biologics, burn and burn reconstruction, plastic and reconstructive surgery, orthopedics, and wound care. Tom spent 10 years with Integra LifeSciences, where he was one of the initial members of the reconstructive division upon the return of IDRT to Integra. Tom played an essential role in the development of the division and founded the regenerative sales specialist program and was named Director of Regenerative Sales. During his time with Integra he participated in the launch of 7 collagen based products which consisted of dermal matrices, nerve tubes and wraps, and a tendon wrap. He also participated in the integration of three orthopedic acquisitions. In 2015 Tom joined Polymedics Innovations as the Director of US Burn and Wound Care. In this role he was responsible for establishing and managing all aspects of the US office. Tom also created partnerships with two burn focused companies to provide sales support targeting burn centers in the United States. Tom completed his collegiate studies at Georgia State University where he received his BS in nursing. Tom joined Stimlabs in March of 2018.


Caroline Keel – Director of Finance and Administration

After graduating with her B.A. of Accounting from the University of Alabama, Caroline began her career as a staff accountant at the Intersect Group. She assisted with, and eventually managed all financial and accounting procedures for the company. In 2012 she served as Senior Accountant for Emory University, further expanding her knowledge of accounting practices in large organizations. Caroline played a vital role in the inception of StimLabs. Currently, she serves as Accounting Manager and a key decision maker for many sides of the business.  



Learn more about how StimLabs is revolutionizing the amniotic tissue market.