Medical Science Liaison/Senior Medical Science Liaison (MSL) - PA & Upstate NY

Overview

Phathom Pharmaceuticals is a biopharmaceutical company dedicated to transforming the treatment of gastrointestinal (GI) diseases. With exclusive rights in the United States, Europe, and Canada to vonoprazan — a first-in-class potassium-competitive acid blocker (PCAB) — Phathom is working to transform the treatment of acid-related disorders.

Our current portfolio includes:

• VOQUEZNA® (vonoprazan) tablets, approved for the treatment of heartburn associated with Non-Erosive GERD, as well as the healing and maintenance of healing of Erosive GERD
• VOQUEZNA® TRIPLE PAK® (vonoprazan tablets, amoxicillin capsules, clarithromycin tablets) and VOQUEZNA® DUAL PAK® (vonoprazan tablets, amoxicillin capsules), approved for the treatment of H. pylori infection in adults

Beyond our commercialized products, we are advancing a pipeline focused on innovative treatments for other acid-related GI disorders, including Eosinophilic Esophagitis (EoE).

At Phathom, we are fueled by innovation, driven by purpose, and united by a shared commitment to improving patient outcomes. Our team comprises seasoned GI and industry experts with proven track records of delivering groundbreaking therapies, including anti-secretory agents. Together, we are tackling unmet medical needs and working hard to enhance the lives of patients.

We seek motivated, innovative problem-solvers who excel in fast-paced, collaborative environments and are eager to make an impact. At Phathom, you’ll find more than a career – you’ll join our “Phamily,” where employees feel empowered, valued, and inspired to do their best work.

In August 2025, we proudly earned the distinction of being Great Place to Work® certified, with 91% of surveyed employees affirming that Phathom is an exceptional workplace.

Ready to help change the landscape in GI? Join us and be part of something extraordinary.

Role title

The Medical Science Liaison (MSL) is a member of a field-based team of scientists who function as an extension of the Medical Affairs organization. MSLs are responsible for developing and enhancing professional relationships with medical thought leaders involved in various phases of product development. MSLs provide medical information through scientific exchange in a fair-balanced manner and provide clinical/scientific support for Phathom and the Medical Affairs department at the direction of Medical Affairs management.

This is a field-based position and requires professionals with established credibility to interact with thought leaders, clinical trial sites, and centers of excellence. The position involves travel of 30-50%.