Senior Scientist / Scientist, In Vivo Pharmacology
Newlimit
South San Francisco, CA · Posted September 4, 2026
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This listing does not state pay. Across 62 open senior scientist listings that state pay, the middle half runs $110,500 to $151,000 and the median is $128,500.
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About the job
Company info
NewLimit is a biotechnology company working to radically extend human healthspan. We’re developing medicines to treat age-related diseases by reprogramming the epigenome, a new therapeutic mechanism to restore regenerative potential in aged and diseased cells. We leverage functional genomics, pooled perturbation screening, and machine learning models to unravel the biology of epigenetic aging and disease using experiments of unprecedented scale.
Description
NewLimit is seeking a talented Scientist / Senior Scientist of In Vivo Pharmacology to join our Translational Sciences team. This critical role designs and executes in vivo studies to evaluate pioneering epigenetic reprogramming therapeutics across our entire portfolio. As a subject matter expert in nonclinical and PK/PD study design, you will lead in vivo pharmacology strategies, collaborate cross-functionally with therapeutic area teams, and directly drive therapeutic candidate selection.
As a Senior Scientist/Scientist on our team, you will:
Design, execute, and interpret in vivo pharmacology studies (PK/PD, efficacy, dose-response) across multiple disease models and therapeutic programs
Collaborate with Epigenetic Editing, Predictive Modeling, and other therapeutic area teams to evaluate epigenetic reprogramming payloads in relevant animal models
Develop and refine animal models of aging and age-related disease to support translational studies
Oversee study design, protocol development, and CRO/vendor relationships for in vivo studies
Analyze and interpret in vivo data (PK/PD, biomarkers, functional endpoints) to drive pre-clinical decision making
Contribute to regulatory-enabling study design and documentation as programs progress toward clinical
Requirements
Ph.D. in pharmacology, physiology, biology or a related field or equivalent industry experience (5+ years for Scientist; 8+ years for Senior Scientist)
Demonstrated experience designing and executing in vivo pharmacology studies (PK, PD, efficacy, dose-range finding) in rodent models
Experience with study design, dosing regimens, and route-of-administration selection
Experience analyzing and interpreting in vivo pharmacology data to inform program decisions
Experience leading project workflows and providing technical mentorship to junior laboratory staff
History of contributing to a drug development program at the pre-clinical or clinical development stage
Nice to have
Experience with liver biology, hepatic disease models, or hepatocyte-directed delivery
Experience with nucleic acid or viral vector delivery in vivo
Experience with GLP-enabling or IND-enabling study design
Experience with single cell genomics or pooled screening approaches applied to in vivo readouts
Benefits
NewLimit offers generous benefits to ensure our team can focus on our mission:
Health, dental, and vision insurance
401(k) with company match
Paid parental leave
Industry-leading paid time off (PTO) — 20 days/year for all employees + holidays
Meals and snacks on-site
Salary Range: $130,000 to $180,000. Compensation for the role will depend on a number of factors, including a candidate’s qualifications, skills, competencies, and experience. NewLimit offers a competitive benefits package, which includes a 401k, healthcare coverage, and 20 days of PTO. Learn more at: https://www.newlimit.com/careers *This compensation and benefits information is based on Company's good faith estimate as of the date of publication and may be modified in the future.