Mr. Sheridan has served on our board of directors since June 2019 and as our President and Chief Executive Officer since March 2019. Prior to that, Mr. Sheridan served as our Executive Vice President and Chief Operating Officer since April 2013. Before joining our Company, Mr. Sheridan served as Chief Operating Officer of Rapiscan Systems, Inc. Earlier in his career, Mr. Sheridan held various leadership roles including Executive Vice President of Research and Development and Operations for Volcano Corporation, Executive Vice President of Operations at CardioNet, Inc., and Vice President of Operations at Digirad Corporation. He previously served as a director of Acutus Medical, Inc. from March 2021 to April 2025. Mr. Sheridan holds a B.S. in Chemistry from the University of West Florida and an MBA from Boston University.
Rick Carpenter has served as our Executive Vice President and Chief Technology Officer since April 2026. He is responsible for our Company’s engineering, research and development functions. From November 2021 to March 2026, Mr. Carpenter served as our Chief Technology Officer. Before joining our Company, Mr. Carpenter served from February 2020 to November 2021 as the Senior Vice President of Engineering at Inseego Corporation. Before that, Mr. Carpenter held leadership roles at Capsule Technologies and Qualcomm Life including General Manager of the IoMT Business and Senior Director of Engineering at Capsule Technologies, and Senior Director of Engineering at Qualcomm Life. Earlier in his career, he held various engineering development and leadership roles at Smith Micro Software, Nextwave Wireless, Sierra Wireless, General Dynamics, Motorola and Denso. Mr. Carpenter holds a B.S. in Computer Science from The University of Texas Permian Basin.
Tom Fox has served as our Executive Vice President and Chief Human Resources Officer since April 2026. He is responsible for our Company’s human resources and facilities. From August 2023 to March 2026, Mr. Fox served as our Chief Human Resources Officer. From August 2020 to July 2023, he served as our Senior Vice President, Human Resources and Organizational Development, and in various human resources leadership roles since joining the Company in April 2015. Before joining our Company, he served as Director of Human Resources for the Oncology-Genoptix Division of Novartis Pharmaceuticals. Earlier in his career, Mr. Fox held various human resources leadership positions for the West Division of BDO, Option One Mortgage Company, and The Walt Disney Company, Disneyland Resort. He holds a B.S. in Business Administration from California State University, Fresno and an M.S. in Labor Relations and Human Resources Management from Michigan State University.
Elizabeth Gasser has served as our Executive Vice President and Chief Strategy and Product Officer since November 2023. She is responsible for our Company’s strategy, business and corporate development, product management, user experience and competitive intelligence functions. From June 2021 to November 2023, Ms. Gasser served as our Executive Vice President and Chief Strategy Officer and as our Executive Vice President, Strategy and Corporate Development from January 2020 to June 2021. Before joining Tandem, Ms. Gasser served as an independent adviser providing strategic and corporate development solutions to boards and executive teams. Earlier in her career, she held various leadership roles including Vice President of Corporate Strategy at Qualcomm Technologies, Inc., a subsidiary of Qualcomm Incorporated. Ms. Gasser holds a B.A. and an M.A. in Economics from the University of Cambridge.
Executive Vice President, Chief Legal, Privacy & Compliance Officer and Secretary Shannon Hansen has served as our Executive Vice President, Chief Legal, Privacy & Compliance Officer and Secretary since April 2024, and as our Chief Legal, Privacy & Compliance Officer and Secretary since August 2023. Ms. Hansen joined the Company as Senior Vice President, General Counsel, Chief Compliance Officer and Secretary in January 2022 and throughout her tenure, she has maintained responsibility for the Company's legal, compliance and privacy functions. She also leads the cybersecurity function at Tandem. Before joining our Company, Ms. Hansen served as General Counsel, Corporate Secretary and Chief Privacy Officer at Alto Pharmacy from April 2020 to September 2021. Before her role at Alto Pharmacy, she held various leadership roles of increasing responsibility at Abbott Laboratories. From August 2021 until June 2025, Ms. Hansen served as an Independent External Audit and Supervisory Board Member for PHC Holdings Corporation. Earlier in her career, she was a partner at Kirkland & Ellis LLP, an Associate Solicitor at the United States Patent and Trademark Office and a process engineer at DuPont. Ms. Hansen holds a B.S. in Chemical Engineering from Carnegie Mellon University, and a J.D. from Stanford Law School.
Executive Vice President and Chief Operating Officer Jean-Claude “JC” Kyrillos has served as our Executive Vice President and Chief Operating Officer since June 2024. He is responsible for our Company’s manufacturing operations, supply chain, quality and regulatory functions. Before joining Tandem, Mr. Kyrillos served in operating company president roles at Envista Holdings from February 2020 to June 2023, most recently serving as President of Diagnostics and Digital Solutions. Prior to that, he was Senior Vice President and General Manager at Qualcomm Life. Earlier in his career, Mr. Kyrillos held leadership roles at Becton Dickinson and ResMed Ventures, including Senior Vice President and General Manager of infusion solutions at Becton Dickinson and President of ResMed Ventures and Initiatives. He has served as an independent board director of San Diego Blood Bank since January 2016 and as Chair from January 2020 to December 2022. Mr. Kyrillos received a B.A. with Honors in History from Colgate University and an MBA from Harvard Business School.
Susan Morrison has served as our Executive Vice President and Chief Administrative Officer since December 2017. She is responsible for our Company’s investor relations, corporate communications, human resources and facilities functions. Ms. Morrison served in successive leadership positions for our Company since November 2007 and helped lead Tandem’s transformation from a domestic venture-backed insulin pump start-up to a global diabetes technology company. Before joining Tandem, Ms. Morrison held leadership positions in Corporate and Investor Relations at Biosite Inc. Earlier in her career, she worked at both boutique and global public relations firms focused on healthcare, consumer products and crisis communications. Ms. Morrison holds a B.A. in Public Relations from Western Michigan University.
Mark Novara has served as our Executive Vice President and Chief Commercial Officer since November 2023. He is responsible for our Company’s US and International marketing, sales, clinical training, customer service, market access, international and commercial operations. Before joining our Company, Mr. Novara served as Senior Advisor in the Medical Technology and Life Science practice at McKinsey & Company from February 2023 to November 2023. Before that, he held executive positions at Becton Dickinson for more than 11 years, serving most recently as Worldwide Vice President and General Manager in the Medication Delivery Solutions business unit from June 2020 to December 2022. Earlier in his career, Mr. Novara held leadership positions with Hoffman-La Roche/Genentech and Sanofi-Aventis. Mr. Novara holds a B.S. in Biology from Villanova University and a Master’s in Healthcare Management from Columbia University.
Dr. Jordan Pinsker has served as our Chief Medical Officer since November 2023 after joining the Company as Vice President and Medical Director in April 2021. He is a leading pediatric endocrinologist and prominent thought leader in artificial pancreas research. Dr. Pinsker joined Tandem from Sansum Diabetes Research Institute in Santa Barbara, California, where he served as the Director of Artificial Pancreas Technology since 2018. In his role at Sansum, he was a lead investigator in numerous clinical trials on automated insulin delivery systems, including Basal-IQ® and Control-IQ™ technology. Prior to this, he was Chief of Pediatric Endocrinology at Tripler Army Medical Center in Hawaii. Dr. Pinsker served as a physician in the United States Army in both Active Duty and in the California Army National Guard for more than 20 years. He completed a combined seven-year BS/MD program with Union College and Albany Medical College in New York. Dr. Pinsker is board certified in Clinical Informatics, Pediatric Endocrinology and General Pediatrics.
Leigh Vosseller has served as our Executive Vice President, Chief Financial Officer, and Treasurer since June 2018. She is responsible for our Company’s financial functions and information technology. Ms. Vosseller held successive financial executive management positions since joining our Company in 2013. Before joining Tandem, she served as Vice President and Chief Financial Officer at Genoptix, and in financial leadership positions at Biosite. Since January 2021, Ms. Vosseller has served as a director and treasurer of Girls Inc. of San Diego, a non-profit organization that provides STEM-focused, research-based programming to underserved girls in the community. Ms. Vosseller is a certified public accountant (inactive) and holds a B.S. in Accounting from Missouri State University.