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87 principal scientist jobs found

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Pharmaceutical principal scientist
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Bausch Health
Feb 27, 2026
Full time
Principal Scientist: Pharmaceutical Science & Technology
Bausch Health USA
Bausch Health Companies Inc. is a global, diversified pharmaceutical company whose mission is to improve people’s lives with our pharmaceutical products. We develop, manufacture and market a range of products primarily in gastroenterology, hepatology, neurology, dermatology, dentistry, aesthetics, and international pharmaceuticals. With our leading durable brands, we are delivering on our commitments to patients, health care providers, other stakeholders and society as we build an innovative company dedicated to advancing global health.
Bausch Health
Feb 27, 2026
Full time
Principal Scientist: Pharmaceutical Science & Technology
Bausch Health USA
Bausch Health Companies Inc. is a global, diversified pharmaceutical company whose mission is to improve people’s lives with our pharmaceutical products. We develop, manufacture and market a range of products primarily in gastroenterology, hepatology, neurology, dermatology, dentistry, aesthetics, and international pharmaceuticals. With our leading durable brands, we are delivering on our commitments to patients, health care providers, other stakeholders and society as we build an innovative company dedicated to advancing global health.
Pfizer
Mar 20, 2026
Full time
Senior Principal Scientist, Process Chemistry
Pfizer Bothell, WA, USA
A role at Pfizer is unlike any other. Offering talented individuals the opportunity to own a career with real impact, our people go to work each day in the knowledge that every development signifies real, positive progress. We all believe in our ability to improve the future of healthcare, and in our potential to transform millions of lives. Because in every part of the world, the work we do is reaching everyone, everywhere for almost every medical need. That means not just attracting the best and brightest talent. But also ensuring our colleagues can thrive in an environment and culture where we champion Diversity and Inclusion every day, around the world.
Pfizer
Mar 20, 2026
Full time
Senior Principal Scientist, Process Chemistry
Pfizer Bothell, WA, USA
A role at Pfizer is unlike any other. Offering talented individuals the opportunity to own a career with real impact, our people go to work each day in the knowledge that every development signifies real, positive progress. We all believe in our ability to improve the future of healthcare, and in our potential to transform millions of lives. Because in every part of the world, the work we do is reaching everyone, everywhere for almost every medical need. That means not just attracting the best and brightest talent. But also ensuring our colleagues can thrive in an environment and culture where we champion Diversity and Inclusion every day, around the world.
Merck
Mar 19, 2026
Full time
Associate Principal Scientist, Vaccines Clinical Assays
Merck PA, USA
At Merck, known as MSD outside of the United States and Canada, we are unified around our purpose: We use the power of leading-edge science to save and improve lives around the world. 
Merck
Mar 19, 2026
Full time
Principal Scientist, Engineering
Merck West Point, PA, USA
At Merck, known as MSD outside of the United States and Canada, we are unified around our purpose: We use the power of leading-edge science to save and improve lives around the world. 
Merck
Mar 19, 2026
Full time
Associate Principal Scientist, Vaccines Clinical Assays
Merck PA, USA
At Merck, known as MSD outside of the United States and Canada, we are unified around our purpose: We use the power of leading-edge science to save and improve lives around the world. 
Merck
Mar 19, 2026
Full time
Associate Principal Scientist (Assoc. Director), Regulatory Affairs - CMC
Merck Rockville, MD, USA
At Merck, known as MSD outside of the United States and Canada, we are unified around our purpose: We use the power of leading-edge science to save and improve lives around the world. 
Merck
Mar 19, 2026
Full time
Associate Principal Scientist, Vaccines Clinical Assays
Merck PA, USA
At Merck, known as MSD outside of the United States and Canada, we are unified around our purpose: We use the power of leading-edge science to save and improve lives around the world. 
Merck
Mar 19, 2026
Full time
Associate Principal Scientist, Clinical Research (Animal Health)
Merck Rahway, NJ, USA
At Merck, known as MSD outside of the United States and Canada, we are unified around our purpose: We use the power of leading-edge science to save and improve lives around the world. 
Merck
Mar 19, 2026
Full time
Associate Principal Scientist (Assoc. Director), Regulatory Affairs - CMC
Merck Rockville, MD, USA
At Merck, known as MSD outside of the United States and Canada, we are unified around our purpose: We use the power of leading-edge science to save and improve lives around the world. 
Merck
Mar 19, 2026
Full time
Associate Principal Scientist, Protein Mass Spectrometry
Merck Rahway, NJ, USA
At Merck, known as MSD outside of the United States and Canada, we are unified around our purpose: We use the power of leading-edge science to save and improve lives around the world. 
Merck
Mar 19, 2026
Full time
Associate Principal Scientist, Vaccines Clinical Assays
Merck PA, USA
At Merck, known as MSD outside of the United States and Canada, we are unified around our purpose: We use the power of leading-edge science to save and improve lives around the world. 
Merck
Mar 19, 2026
Full time
Associate Principal Scientist, Clinical Research (Animal Health)
Merck Rahway, NJ, USA
At Merck, known as MSD outside of the United States and Canada, we are unified around our purpose: We use the power of leading-edge science to save and improve lives around the world. 
Merck
Mar 19, 2026
Full time
Associate Principal Scientist, Vaccines Clinical Assays
Merck PA, USA
At Merck, known as MSD outside of the United States and Canada, we are unified around our purpose: We use the power of leading-edge science to save and improve lives around the world. 
Merck
Mar 19, 2026
Full time
Associate Principal Scientist, Clinical Research (Animal Health)
Merck Rahway, NJ, USA
At Merck, known as MSD outside of the United States and Canada, we are unified around our purpose: We use the power of leading-edge science to save and improve lives around the world. 
Merck
Mar 19, 2026
Full time
Associate Principal Scientist, Discovery Oncology
Merck South San Francisco, CA, USA
At Merck, known as MSD outside of the United States and Canada, we are unified around our purpose: We use the power of leading-edge science to save and improve lives around the world. 
Merck
Mar 19, 2026
Full time
Principal Scientist (Director) - Regulatory Affairs-CMC
Merck North Wales, PA, USA
At Merck, known as MSD outside of the United States and Canada, we are unified around our purpose: We use the power of leading-edge science to save and improve lives around the world. 
Merck
Mar 19, 2026
Full time
Senior Principal Scientist, Clinical Research, Neuroscience
Merck North Wales, PA, USA
At Merck, known as MSD outside of the United States and Canada, we are unified around our purpose: We use the power of leading-edge science to save and improve lives around the world. 
Merck
Mar 19, 2026
Full time
Associate Principal Scientist, Combination Product Design Verification (Associate Director Equivalent)
Merck Rahway, NJ, USA
At Merck, known as MSD outside of the United States and Canada, we are unified around our purpose: We use the power of leading-edge science to save and improve lives around the world. 
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