Viatris recently announced that Theodora "Doretta" Mistras, Chief Financial Officer (CFO), will depart the company for a new professional opportunity.

Viatris has named Paul Campbell, currently Chief Accounting Officer and Corporate Controller, as interim CFO, effective May 8, 2026, while the company conducts its search for a permanent successor. Mistras will remain with the company until May 22, 2026, to facilitate a seamless transition.

Scott A. Smith, CEO, Viatris, said, "We thank Doretta for her significant contributions, which have helped prepare the company to enter a period of sustainable future growth. Given Paul's deep knowledge of Viatris and his financial expertise and experience, we are confident he is the right transitional leader to maintain continuity and operational discipline while we focus on positioning the company for sustained long-term growth."

Campbell brings more than two decades of experience in accounting, financial operations and corporate leadership to the position. In his current role as Chief Accounting Officer and Corporate Controller of Viatris, he oversees the company's global accounting and finance operations. Since joining Viatris' legacy company, Mylan, in 2002, Campbell has played a key role in strengthening financial processes, supporting strategic initiatives and maintaining disciplined financial management across the organisation.

Prior to his current role, Campbell served as Mylan's Chief Accounting Officer, Senior Vice President and Controller, where he was responsible for the company's accounting, financial operations and reporting. During his tenure, he has held positions of increasing responsibility across internal audit, business development, corporate development and operations finance, contributing to the company's growth and transformation. Earlier in his career, he spent nearly a decade at Deloitte and Touche, where he served as a Senior Manager in Audit.

Campbell holds a Bachelor of Science in Accounting from Pennsylvania State University.