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. Prior to joining us, Mr. Sheridan served as Chief Operating Officer of Rapiscan Systems, Inc., a provider of security equipment and systems, from March 2012 to February 2013. Mr. Sheridan served as Executive Vice President of Research and Development and Operations for Volcano Corporation, a medical technology company, from November 2004 to March 2010. From May 2002 to May 2004, Mr. Sheridan served as Executive Vice President of Operations at CardioNet, Inc., a medical technology company, now operating as BioTelemetry, Inc. (Nasdaq: BEAT). From March 1998 to May 2002, he served as Vice President of Operations at Digirad Corporation, a medical imaging company. Mr. Sheridan previously served as a director of Acutus Medical, Inc. (Nasdaq: AFIB) 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 Chief Technical Officer since November 2021. Before joining our Company, Mr. Carpenter served from February 2020 as the Senior Vice President of Engineering at Inseego Corporation, where he led the worldwide engineering team and was responsible for device hardware and software, cloud software, quality assurance, regulatory and product certification and technical account management. From April 2017 to January 2020, he was the General Manager of the IoMT Business and the Senior Director of Engineering at Capsule Technologies, a company that integrates medical devices and wearables into a secure medical grade system that collects data and provides it to healthcare professionals for patient monitoring. Prior to that, from May 2009 until March 2017, Mr. Carpenter served as the Senior Vice President of Engineering at Smith Micro Software. Earlier in his career, he held various engineering development and leadership roles at Nextwave Wireless, Sierra Wireless, General Dynamics, Motorola and Denso. Mr. Carpenter received a B.S. in Computer Science from The University of Texas Permian Basin, and completed coursework for an M.S. in Computer Science from The University of Texas at Arlington.

Tom Fox was appointed Chief Human Resources Officer in August 2023. From August 2020 to July 2023, he served as Senior Vice President, Human Resources and Organizational Development. From August 2017 to July 2020, he served as Vice President, Human Resources. Prior to this, he served as Senior Director of our Human Resources Department. Mr. Fox has more than 20 years of experience in Human Resources management. Prior to joining Tandem, Mr. Fox served as Director of Human Resources for the Oncology-Genoptix Division of Novartis Pharmaceuticals. Before that, he held various HR leadership positions including Director of Human Resources for the West Division of BDO, USA LLP; Director of HR Client Services for Option One Mortgage Company (a subsidiary of H&R Block Corp.) and Director of Labor and Employee Relations at The Walt Disney Company, Disneyland Resort. Mr. Fox began his career at Chevron Corporation and holds a B.S. in Business Administration from California State University, Fresno and a 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. From June 2021 to November 2023 Ms. Gasser served as our Executive Vice President and Chief Strategy Officer. Ms. Gasser is responsible for the Company’s strategy, corporate development, product management, behavioral sciences, and competitive intelligence functions. She previously served as our Executive Vice President, Strategy and Corporate Development from January 2020 to June 2021. Before joining our Company, Ms. Gasser served from June 2017 as an independent adviser providing strategic and corporate development solutions to boards and executive teams. From January 2016 to June 2017, she was Vice President of Corporate Strategy at QUALCOMM Technologies, Inc. (QTI), a subsidiary of QUALCOMM Incorporated (Nasdaq: QCOM), a global leader in the development and commercialization of technologies and products used in mobile devices and other wireless products. Before that, from November 2012 to January 2016 she was Vice President of Strategic Development at QTI, after serving in other strategic related roles of increasing responsibility beginning in 2006. Ms. Gasser holds a B.A. and an M.A. in Economics from the University of Cambridge.

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. 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, where she oversaw the development of the legal, privacy and compliance functions. Before her role at Alto Pharmacy, she held various leadership roles at Abbott Laboratories from May 2009 to February 2020. In August 2021, Ms. Hansen began serving 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.

Jean-Claude “JC” Kyrillos has served as our Executive Vice President and Chief Operating Officer since June 2024 and is responsible for the Company’s manufacturing operations, supply chain, quality, regulatory and program management functions. Before joining our Company, he served in operating company president roles at Envista Holdings from February 2020 to June 2023, most recently as President of Diagnostics and Digital Solutions. Prior to that, Mr. Kyrillos was Senior Vice President and General Manager at Qualcomm Life, the healthcare division at Qualcomm, from May 2016 to February 2019. Before his time at Qualcomm, Mr. Kyrillos served as Senior Vice President and General Manager of infusion solutions at Becton Dickinson from August 2011 to May 2016. Prior to that, Mr. Kyrillos held leadership positions at ResMed Inc. from January 2008 to August 2011, most recently serving as President of ResMed Ventures and Initiatives. Mr. Kyrillos 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 and is responsible for the 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. Prior to joining Tandem Diabetes Care, Ms. Morrison held various positions in Corporate and Investor Relations at Biosite Inc. from August 2003 through November 2007. Prior to that, 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. Mr. Novara is an executive with nearly 25 years of general management, strategy and marketing experience in the medical device, life science and pharmaceutical industries. Before joining our Company, he served as Senior Advisor in the Medical Technology/Life Science practice at McKinsey & Company from February 2023 to November 2023. Before that time, Mr. Novara held executive positions at Becton Dickinson (BD) for more than 11 years, most recently as a Worldwide Vice President/General Manager in the Medication Delivery Solutions business unit from June 2020 to December 2022. He also served as Senior Vice President, Global Strategic Marketing for two of BD’s segments, Medical from May 2018 to June 2020, and Life Sciences from December 2015 to May 2018. Mr. Novara was also a Worldwide Vice President/General Manager in the Diabetes Care business unit from November 2013 to December 2015, and Director of Strategic Marketing and Business Development in the Pharmaceutical Systems business unit from July 2011 to November 2013. He also held leadership positions with Hoffman-La Roche 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 technology 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. You can read about many of his studies on his Google Scholar page.

Leigh Vosseller has served as our Executive Vice President, Chief Financial Officer, and Treasurer since June 2018, and served as Senior Vice President, Chief Financial Officer and Treasurer from January 2018 to May 2018. Ms. Vosseller is our principal financial and accounting officer. She joined us as Vice President of Finance in 2013 and was promoted to Senior Vice President of Finance in August 2017. Before that time, she served as Vice President and Chief Financial Officer at Genoptix, beginning in 2011, after initially joining Genoptix in 2008. Before that she held a senior finance position at Biosite, a diagnostics company, where she played a key role in developing the financial and administrative infrastructure for international expansion. Since January 2021, Ms. Vosseller has served as a director and chair of the finance committee 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.