Merck & Co, Inc

Principal Scientist, Toxicologist/Study Director

Merck & Co, Inc$173K — $272K *
Pharmaceuticals & Biotech
8 - 10 years of experience
Job Overview by Ladders

Qualifications

  • PhD and/or DVM in toxicology, pharmacology, or related field
  • 8+ years of experience as a Toxicologist or Study Director
  • Strong expertise in immunology and biologics
  • Proven knowledge of Good Laboratory Practices (GLP)
  • Demonstrated leadership and collaboration skills
  • Strong written and verbal communication abilities

Responsibilities

  • Serve as Study Director for toxicology studies, ensuring compliance with protocols and regulations
  • Analyze and interpret complex data, integrating findings into regulatory reports
  • Manage study execution with proactive risk identification
  • Contribute to cross-functional teams investigating toxicity mechanisms
  • Represent the department on drug development teams, guiding nonclinical safety strategies
  • Cultivate collaborative relationships within and outside the department
  • Deliver results with accountability, adapting to changing circumstances

Benefits

  • Comprehensive medical, dental, and vision insurance
  • 401(k) retirement benefits
  • Paid holidays, vacation, sick, and compassionate days
  • Eligibility for annual bonuses and long-term incentives
  • Support for relocation and visa sponsorship
Full Job Description

Job Description

Principal Scientist, Toxicologist/Study Director

Job Description:

The Nonclinical Drug Safety department is seeking a motivated and talented toxicologist with immunology and/or biologics experience to conduct and/or monitor toxicity studies (GLP and non-GLP) as a Study Director or Study Monitor and serve as a departmental representative on drug development teams.  Toxicologists at our Company are integral members and leaders of collaborative cross functional scientific teams, addressing challenges from early discovery to late development.  Our toxicologists provide scientific leadership in the design and overall conduct of in vivo studies and integrate the findings from all contributing scientists into reports that characterize the safety profile of drug candidates.

Key Responsibilities

  • Serve as the single point of control (Study Director) on assigned acute through chronic general toxicology studies across all modalities.  Interact with technical, veterinary, and scientific staff to ensure that the study is in compliance with the protocol, amendments, Standard Operating Procedures, regulations, safety guidelines, and company policies and procedures.

  • Critically analyze and interpret data. Integrate data from other areas (e.g., clinical pathology, pathology, toxicokinetics) in written reports used for regulatory submissions, and communicate results within established timelines.

  • Ensure regulatory rigor, proactive risk identification, and timely study execution.

  • Participate on cross-functional group teams to investigate mechanisms of toxicity, utilizing additional tools and applications that are available on site.

  • Serve as a departmental representative on a product development team, overseeing the strategy and design of nonclinical safety studies and generation of regulatory strategies and communications with global regulatory agencies to support the development of drug candidates.

  • Demonstrate enterprise mindset and strategic thinking, proactively identifying opportunities, anticipating challenges, and contributing to solutions aligned with broader organizational priorities.

  • Build strong collaborative relationships and influences without authority, contributing to an inclusive team environment and actively learning to coach, develop, and elevate others.

  • Deliver high-quality results with accountability and agility, translating objectives into action while continuously improving, embracing change, and showing potential to lead larger initiatives over time.

Education

PhD and/or DVM with graduate and/or post-graduate work training in toxicology, pharmacology, or related scientific discipline

Requirements

  • Minimum of 8 (eight) years of relevant experience as a Toxicologist or Study Director in pharma, biotech, or at a CRO

  • Demonstrated understanding of and experience with Good Laboratory Practices (US FDA 21 CFR Part 58)

  • Strong interest in collaborating with diverse cross-functional teams and communicating openly and often with colleagues

  • Strong listening, collaboration, and leadership skills

  • Ability to communicate clearly using verbal and written formats, including presentations and meetings

  • Expertise in immunology and/or biologics, especially regulatory requirements and testing

Preferred

  • Knowledgeable about drug developmentstrategies for biotherapeutics and large molecules

  • Familiarity with outsourced study monitoring

  • Experience serving as toxicology expert on a drug discovery and development team

  • Representation of nonclinical safety in regulatory agency interactions

 

Required Skills:

Clinical Immunology, Clinical Pathology, Cross-Functional Teamwork, Detail-Oriented, Environmental Toxicology, Experimentation, GLP Regulations, Good Laboratory Practices (GLPs), Identifying Risks, Immunoassays, Immunology, Immunotherapy, Mentoring Staff, Preclinical Toxicology (Inactive), Professional Integrity, Professional Networking, Regulatory Requirements, Report Preparation, Study Directing, Study Monitoring, Technical Advising, Toxicity Studies, Toxicology, Toxicology Research

Preferred Skills:

Current Employees apply HERE

Current Contingent Workers apply HERE

The salary range for this role is

$173,200.00 - $272,600.00

This is the lowest to highest salary we in good faith believe we would pay for this role at the time of this posting. An employee’s position within the salary range will be based on several factors including, but not limited to relevant education, qualifications, certifications, experience, skills, geographic location, government requirements, and business or organizational needs.

The successful candidate will be eligible for annual bonus and long-term incentive, if applicable.

We offer a comprehensive package of benefits.  Available benefits include medical, dental, vision healthcare and other insurance benefits (for employee and family), retirement benefits, including 401(k), paid holidays, vacation, and compassionate and sick days. More information about benefits is available at https://jobs.merck.com/us/en/compensation-and-benefits.

You can apply for this role through https://jobs.merck.com/us/en (or via the Workday Jobs Hub if you are a current employee). The application deadline for this position is stated on this posting.

Employee Status:

Regular

Relocation:

Domestic/International

VISA Sponsorship:

Yes

Travel Requirements:

10%

Flexible Work Arrangements:

Not Applicable

Shift:

Not Indicated

Valid Driving License:

No

Hazardous Material(s):

N/A

Job Posting End Date:

07/23/2026

*A job posting is effective until 11:59:59PM on the day BEFOREthe listed job posting end date. Please ensure you apply to a job posting no later than the day BEFORE the job posting end date.

About Merck & Co, Inc

Schering-Plough Corporation is a major U.S.-based manufacturer of pharmaceuticals. It operates in three segments: Prescription Pharmaceuticals, Animal Health, and Consumer Health Care. Schering-Plough develops products targeting on allergy, cancer, hepatitis, cardiovascular, central nervous system, respiratory system, and more.  It was founded in 1851 by Ernst Christian Friedrich Schering as Schering AG in Germany. Schering-Plough manufactured several pharmaceutical drugs, the most well-known of which were the allergy drugs Claritin and Clarinex, an anti-cholesterol drug Vytorin, and a brain tumor drug Temodar. It also developed drugs targeting on central nervous system and the respiratory system. Schering Plough also owned and operated the major foot care brand name Dr. Scholl's and the skin care line Coppertone. These also became a part of the new company. Schering-Plough was a full member of the European Federation of Pharmaceutical Industries and Associations (EFPIA), a membership which is also maintained by the new Merck.

Merck & Co, Inc Careers

Join the visionary team at Merck & Co, Inc, a global leader in healthcare dedicated to advancing the world of medicine. As part of our professional community, you'll find dynamic job opportunities that foster innovation and leadership across various fields. Merck & Co, Inc is not just a company; it's a place where you can make a difference.

Work You’ll Do

At Merck & Co, Inc, we are committed to improving global health through groundbreaking research and innovative healthcare solutions. Our team is at the forefront of developing new therapies and vaccines that significantly impact public health worldwide. By joining us, you will collaborate with some of the brightest minds in the industry, using your skills to contribute to projects that save and improve lives around the globe.

Explore Career Paths

Whether you're seeking an internship, a graduate opportunity, or a professional position, Merck & Co, Inc offers a range of career paths in environments that promote rapid professional growth and development. Explore job opportunities in research, digital transformation, manufacturing, and more, all while benefiting from a culture that supports diversity and inclusion.

Innovate and Lead

Merck & Co, Inc is an ideal environment for those who lead with curiosity and the drive to innovate. Our leadership is committed to fostering a culture where inventive thinking and collaboration are encouraged, making it a perfect place for professionals who seek to make an impact through their work.

Develop Your Skills

With Merck & Co, Inc, you are not just getting a job; you're gaining access to unparalleled career development opportunities. Enhance your skills through diverse training programs, workshops, and continuous learning courses designed to help you grow at every stage of your career.

Benefits and Culture

We understand that our employees are our greatest asset, which is why we offer competitive benefits designed to support the health and well-being of you and your family. From comprehensive health care coverage and retirement plans to flexible working conditions and wellness programs, our benefits package is designed to meet the diverse needs of our team members.

Join Our Team

Ready to advance your career at Merck & Co, Inc? Search open positions that match your skills and interests. We are continuously hiring and looking for passionate, creative, and solution-driven team players. Prepare your resume, sharpen your interview skills, and become part of a company that's dedicated to making a difference.

Stay Connected

Keep up to date with career tips, insider perspectives, and industry-leading insights you can put to use today—all from the people who work here. Engage with us through our careers blog and by participating in networking events and employment fairs. Subscribe to receive personalized job alerts and the latest news tailored to your preferences. Discover the exciting and rewarding opportunities that await at Merck & Co, Inc. Join us in our mission to improve health and wellness around the world.
Learn more about Merck & Co, Inc
Size
68,000 employees
Market Cap
$282.6 billion
Industry
Net Income
$7 billion
Founded
1668
5 Year Trend
+4.1%
Revenue
$47.9 billion
NASDAQ

Similar Jobs

More Jobs at Merck & Co, Inc

More Pharmaceuticals & Biotech Jobs

Find similar Principal Scientist, Toxicologist/Study Director jobs: