Bill Esler

Bill Esler

Company: Pfizer

Job title: Senior Director


William (Bill) Esler, PhD is a Senior Director in the Internal Medicine Research Unit at Pfizer. Bill is a Research Project Leader and is responsible for leading drug discovery programs from early discovery stages through clinical Proof of Concept. While at Pfizer, he has led multiple drug discovery and development projects principally in the areas of NASH and type 2 diabetes mellitus. Bill also contributes to Pfizer’s integrated NASH disease area strategy.


Bill is a broadly trained scientist with expertise in drug discovery and development and in metabolic diseases and NASH. He received his undergraduate training in Chemistry at Trinity College in Hartford CT and earned his PhD in Biological Chemistry and Molecular Pharmacology from Harvard University in Cambridge MA. He subsequently undertook postdoctoral training at Harvard Medical School and Brigham and Women’s Hospital in Boston MA.


Bill joined Pfizer in 2007. Prior to his current role as project leader, Bill oversaw a research laboratory focused on metabolic disease drug discovery.

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