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Meet the Team

Executive Team

Our Executive Team is comprised of leaders who reflect the values from both Upsher-Smith and our owner, Sawai Group Holdings Co., Ltd.


Rusty Field

President & CEO, Upsher-Smith Laboratories, LLC

As President and Chief Executive Officer, Rusty Field is responsible for the strategic direction, operating performance and growth of Upsher-Smith Laboratories. He is driven by an unwavering commitment to the company vision of helping improve the health and lives of patients through high-quality products.

Rusty joined Upsher-Smith in 2014 after five years with United Healthcare and 20 years with Ameriprise Financial, where he held senior executive sales, marketing and general management positions.

Rusty is also a member of the company’s Board of Directors, along with senior executives from Sawai Pharmaceutical Co., Ltd., which acquired Upsher-Smith in 2017.

Rusty holds a B.A. in Economics from Williams College in Williamstown, Massachusetts.


Masahiro Sasaki

Chairman of the Board, Upsher-Smith Laboratories, LLC and Group Chief Officer, USA Business, Sawai Group Holdings Co., Ltd.

As Chairman of the Board for Upsher-Smith Laboratories, LLC, Masahiro Sasaki is the most senior Sawai executive serving on-site at Upsher-Smith. He works with Upsher-Smith President & CEO Rusty Field to lead strategy and decision-making for the U.S. pharmaceutical company and is instrumental in working to generate and leverage synergies between the two companies.

Masahiro became Chairman in June 2020, having previously served as Vice Chairman. He also serves as Group Chief Officer, USA Business, Sawai Group Holdings Co., Ltd., having joined the company in 2013. Before that, he served in numerous medical and healthcare business roles for 37 years at Sumitomo Corp., which also currently owns a stake in Upsher-Smith.

Masahiro earned a Bachelor of Science in Pharmaceutical Science from The University of Tokyo.