Merck & Co, Inc

Associate Principal Scientist, Discovery Oncology

Merck & Co, Inc$159K — $251K *
Pharmaceuticals & Biotech
Less than 5 years of experience
Job Overview by Ladders

Qualifications

  • Ph.D. in a relevant field with 4+ years in oncology drug discovery
  • Expertise in tumor biology and immune oncology
  • Extensive experience with multi-color flow cytometry and cell-based assays
  • Proven track record of innovative research with high-impact publications
  • Strong communication and leadership skills

Responsibilities

  • Design and optimize in vitro and ex vivo assays for drug discovery
  • Make informed, data-driven decisions in research
  • Effectively communicate scientific findings to internal and external stakeholders
  • Lead early-stage discovery initiatives leveraging emerging technologies
  • Collaborate across teams to advance cancer therapies

Benefits

  • Comprehensive medical, dental, and vision insurance
  • 401(k) retirement plan with company matching
  • Paid holidays and vacation days
  • Sick and compassionate leave days
  • Long-term incentives, including annual bonuses
Full Job Description

Job Description

We are seeking a highly motivated and innovative Associate Principal Scientist to join our Discovery Oncology team in South San Francisco. The successful candidate will have a strong track record in oncology and drug discovery and will lead the conception, design, and execution of discovery-stage research programs. In this role, you will partner closely with cross-functional teams across the organization to advance differentiated cancer therapies from target validation through early development.

Key Responsibilities:

Design, establish, and optimize in vitro and ex vivoassaysto elucidate mechanisms of action and assess therapeutic potential.

Make timely, data-driven decisions that balance innovation, risk, and experimental rigor

Communicate scientific strategy, rationale, and results clearly to internal teams and help build external scientific presence through publications, conference presentations, and collaboration

Drive ideation and early-stage discovery efforts to deliver competitive oncology programs, leveraging internal expertise and emerging technologies

QUALIFICATIONS:

Education:

  • Ph.D. in Cancer Biology, Cell Biology, Pharmacology, Immunology, Biochemistry, or a related discipline with four (4) or more years of relevant oncology drug discovery experience

Required Experience and Skills:

  • Deep expertise in tumor biology and immune oncology, including cancer genomics and oncogenic signaling
  • Broad technical expertise in molecular and cellular biology, biochemistry, and analytical methods
  • Extensive hands-on in vitroexperience designing, executing, and analyzing multi-color flow cytometry and mechanistic cell-based assays (e.g., viability/cytotoxicity, cell cycle, signaling, and immune response readouts)
  • Demonstrated ability to drive innovative research, evidenced by high-impact publications, patents, and/or successful advancement of discovery programs
  • Passionate, creative, and collaborative scientist committed to improving outcomes for people living with cancer
  • Excellent oral and written communication skills, a positive, team-oriented mindset, and strong leadership potential

Preferred Experience and Skills:

  • Hands-on experience with different therapeutic modalities (e.g.,small molecules, mAbs,ADCs and TCEs)
  • Extensive hands-on experience designing, executing, and analyzing in vivo mouse model data to evaluate therapeutics

#EligibleforERP

Required Skills:

Biochemistry, Cancer Cell Biology, Cancer Research, Cell Biology, Immuno-Oncology, In Vitro Biology, In Vitro Research, In Vitro Studies, Molecular Biology, Oncology, Tumor Biology

Preferred Skills:

Current Employees apply

Current Contingent Workers apply

US and Puerto Rico Residents Only:

Our company is committed to inclusion, ensuring that candidates can engage in a hiring process that exhibits their true capabilities. Please if you need an accommodation during the application or hiring process.

The salary range for this role is

$159,600.00 - $251,200.00

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 employees 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 .

You can apply for this role through (or via the Workday Jobs Hub if you are a current employee). The application deadline for this position is stated on this posting.

San Francisco Residents Only:We will consider qualified applicants with arrest and conviction records for employment in compliance with the San Francisco Fair Chance Ordinance

Los Angeles Residents Only:We will consider for employment all qualified applicants, including those with criminal histories, in a manner consistent with the requirements of applicable state and local laws, including the City of Los Angeles Fair Chance Initiative for Hiring Ordinance

Search Firm Representatives Please Read Carefully
Merck & Co., Inc., Rahway, NJ, USA, also known as Merck Sharp & Dohme LLC, Rahway, NJ, USA, does not accept unsolicited assistance from search firms for employment opportunities. All CVs / resumes submitted by search firms to any employee at our company without a valid written search agreement in place for this position will be deemed the sole property of our company. No fee will be paid in the event a candidate is hired by our company as a result of an agency referral where no pre-existing agreement is in place. Where agency agreements are in place, introductions are position specific. Please, no phone calls or emails.

Employee Status:

Regular

Relocation:

Domestic/International

VISA Sponsorship:

Yes

Travel Requirements:

10%

Flexible Work Arrangements:

Not Applicable

Shift:

1st - Day

Valid Driving License:

No

Hazardous Material(s):

n/a

Job Posting End Date:

07/10/2026

*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.

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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

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