Leadership Team

Tausif ‘Tosh’ Butt
CEO and President

Tosh is a biotech and pharmaceutical veteran, with over 30 years of experience leading companies, teams and portfolios in the service of patients.

Prior to Navigator, Tosh served as President and General Manager of Idorsia Pharmaceuticals and Executive Vice President and Chief Operating Officer at ChemoCentryx. There he led the company’s portfolio management, playing a significant role in the Company’s development and launch strategy leading to successful acquisition by Amgen for $3.7Bn.

Throughout his career has Tosh built and led global teams across several therapeutic areas at global pharmaceutical companies including AstraZeneca, GSK, and Sanofi.

Tosh is a pharmacist by training with an MBA from Imperial College London and a Bachelor of Pharmacy from University of Brighton, UK.