Merck
Merck

60 Merck Principal Scientist Jobs Hiring Near You

We are seeking an Associate-Principal Scientist-with strong background in Immunology and experience ... Merck & Co., Inc., Rahway, NJ, USA, also known as Merck Sharp & Dohme LLC, Rahway, NJ, USA, does ...

Principal Scientist (Medical Director level or known internally as Clinical Directors) must have a ... Merck & Co., Inc., Rahway, NJ, USA, also known as Merck Sharp & Dohme LLC, Rahway, NJ, USA, does ...

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Merck Jobs Information

Do workers at Merck get paid breaks?

Sometimes. Only some people get paid breaks.
46% of people say they don’t get paid breaks.
Based on data from 24 people who took the Breakroom Quiz between December 2024 and February 2026.

Does Merck pay people when they’re sick?

Yes. Most people get paid when they’re sick.
83% of people say they would get paid if they were sick but scheduled to work.
Based on data from 46 people who took the Breakroom Quiz between December 2024 and July 2026.

At Merck, are sick days and vacation days separate paid time off?

Sick days and vacation days are separate paid time off.
80% of people say they don’t have to use vacation days when they’re out sick.
Based on data from 25 people who took the Breakroom Quiz between May 2025 and July 2026.

Is the health insurance from Merck affordable enough for their workers?

Most people say the health insurance costs are okay.
100% of people say the health insurance costs are okay
Based on data from 33 people who took the Breakroom Quiz between March 2025 and July 2026.

Do people get paid time off at Merck?

Most people get paid time off work.
93% of people say they get paid time off.
Based on data from 28 people who took the Breakroom Quiz between May 2025 and July 2026.

How far ahead of time do people find out their work schedule?

Most people find out their schedule less than four weeks ahead of time.
  • 38% of people with changing schedules find out their shifts one week or less ahead of time.
  • 25% of people with changing schedules find out their shifts two weeks ahead of time.
  • 13% of people with changing schedules find out their shifts three weeks ahead of time.
  • 25% of people with changing schedules find out their shifts four weeks or more ahead of time.

Based on data from 8 people who took the Breakroom Quiz between February 2025 and February 2026.

Do workers at Merck worry about hours?

Most people don’t worry about getting enough hours.
92% of people report they don’t worry about getting enough hours.
Based on data from 26 people who took the Breakroom Quiz between December 2024 and July 2026.

Do Merck workers get to choose the shifts they work?

Some people don’t get to choose which shifts they work.
48% report that they don’t have enough control over which shifts they work.
Based on data from 23 people who took the Breakroom Quiz between December 2024 and February 2026.

How easy is it for Merck workers to change shifts?

Most people find it hard to change shifts.
73% of people report that it’s hard to change shifts if they need to.
Based on data from 11 people who took the Breakroom Quiz between December 2024 and July 2026.

How easy is it to get time off at Merck?

Most people find it easy to get time off.
86% of people report it’s easy to get time off.
Based on data from 44 people who took the Breakroom Quiz between December 2024 and July 2026.

Do Merck managers change schedules at the last minute?

Most managers don’t change people’s schedules at the last minute.
93% of people say their manager doesn’t change their shift schedule at the last minute.
Based on data from 28 people who took the Breakroom Quiz between December 2024 and July 2026.

Do jobs at Merck spill into time workers aren’t paid for?

Rarely. The job doesn't usually spill into unpaid time.
17% of people report that their job takes up time that they don’t get paid for.
Based on data from 30 people who took the Breakroom Quiz between December 2024 and July 2026.

How easy is it to take sick days at Merck?

Most people find it easy to take sick days.
85% of people report that it’s easy to take time off if they are sick.
Based on data from 47 people who took the Breakroom Quiz between December 2024 and July 2026.

Is working at Merck good if you’re a parent or caregiver?

Most parents and caregivers say this is a good place to work.
86% of people who care for a child or other relative report this is a good place to work.
Based on data from 22 people who took the Breakroom Quiz between January 2025 and July 2026.

Do people at Merck feel treated with respect by their managers?

Most people feel treated with respect by their managers.
80% of people say they’re treated with respect by their managers.
Based on data from 41 people who took the Breakroom Quiz between December 2024 and July 2026.

Do people at Merck get to take their breaks without interruption?

Most people get breaks without interruption.
79% of people report that they get to take their breaks without interruption.
Based on data from 39 people who took the Breakroom Quiz between December 2024 and July 2026.

Is it stressful to work at Merck?

Most people feel stressed here.
75% of people say they often feel stressed at work.
Based on data from 51 people who took the Breakroom Quiz between December 2024 and July 2026.

Do people at Merck enjoy their jobs?

Most people enjoy their job.
76% of people report they enjoy their job.
Based on data from 37 people who took the Breakroom Quiz between December 2024 and July 2026.

Do people at Merck recommend working with their team?

Only some people recommend working with their team.
43% of people report that they wouldn’t recommend working with their immediate team to a friend.
Based on data from 51 people who took the Breakroom Quiz between December 2024 and July 2026.

Do people get enough training when they start at Merck?

Most people got enough training when they started.
77% of people report they got enough training when they started working here.
Based on data from 47 people who took the Breakroom Quiz between December 2024 and July 2026.

Do people get support to advance at Merck?

Most people are given support to advance their career here.
In the last year, 67% of people report being given support to advance their career here.
Based on data from 46 people who took the Breakroom Quiz between December 2024 and July 2026.

Do people think Merck’s headquarters understands what’s happening where they work?

Most people think headquarters doesn’t understand what’s happening where they work.
82% of people think that this employer’s headquarters or owners don’t have a good understanding of what’s really happening where they work.
Based on data from 45 people who took the Breakroom Quiz between December 2024 and July 2026.

Do workers feel well informed about how Merck is doing?

Only some people feel well informed about how the company is doing.
36% of people feel that they aren’t kept well informed about how the company is doing as a whole.
Based on data from 44 people who took the Breakroom Quiz between December 2024 and July 2026.
Infographic showing various Principal Scientist job openings at Merck in the United States as of August 2026, with employment types broken down into 99% Full Time, and 1% Part Time. Highlights an 87% Physical, 2% Hybrid, and 11% Remote job distribution.

Associate Principal Scientist, Upstream Development

Merck & Co.

Rahway, NJ • On-site

$142 - $224/hr

Other

Medical, Dental, Vision, Retirement, PTO

Posted 19 days ago


Merck rating

8.0

Company rating: 8.0 out of 10

Based on 51 frontline employees who took The Breakroom Quiz

43rd of 86 rated pharmaceutical


Job description

Job Description

Job Description: -

The Biologics Process Research & Development organization within our company's Research Laboratories is responsible for developing the drug substance manufacturing processes for our company's biologics pipeline. We work closely with colleagues in Discovery, Pre-clinical and Early Development to rapidly develop manufacturing processes for biotherapeutics and efficiently manufacture material to supply clinical trials. We are also responsible for commercial process development and development and implementation of new manufacturing technologies. We work with our partners in our company's Manufacturing Division to commercialize and launch new products.

We are seeking a highly motivated and energetic individual to join our Biologics Process Development Department as an Associate Principal Scientist.- Applicant must have effective organizational and multi-tasking skills, demonstrated excellent scientific leadership in Upstream process development, and superior written and oral communications abilities. Evidence of strong cross-functional collaboration, significant external presence with scientific excellence, and interest and abilities for mentoring junior staff are also expected.

In this role, the successful candidate will work closely with a highly motivated team of Scientists and Engineers in the Upstream Process Development area and contribute to CMC development of our company's pipeline, playing an active role in the design, development, and optimization of cell culture processes and the transfer of processes to clinical and commercial manufacturing sites. She/He will also participate in developing and refining strategies related to next-generation processes through technology development initiatives for assets in early and late-stage clinical development.

Responsibilities include, but are not limited to:
  • Participates in and/or leads upstream process development of first-in-human and commercial processes by efficiently developing high yield, robust, and scalable cell culture processes.
  • Responsible for process development, process characterization, and regulatory filing activities to ensure a smooth and clear path to successful PPQs and BLAs for the company's pipeline.
  • Partner with colleagues in Discovery, Cell Line, Downstream Process Development, Analytical Sciences, and Manufacturing to develop integrated clinical and commercial process and manufacturing solutions that achieve quality by design targets with robust control strategies.
  • Advancing the upstream platform processes through creative process improvement initiatives to increase operational efficiency and reduce costs.
  • Collaborate with academia, industry partners, and vendors to drive development, innovation, and adoption of new process technologies.
  • Keep up to date with the external patent and literature environment; actively present and publish externally and pursue patenting strategies.
MINIMUM EDUCATION REQUIREMENTS:-
  • Ph.D. with 4+ years' experience or Master's with 8+ years' experience or a bachelor's with 12 years of experience in chemical engineering, Bioengineering, Biological Engineering, or a related field
REQUIRED EXPERIENCE AND SKILLS:
  • Technical background and hands-on experience with mammalian cell culture and fed-batch processes to produce recombinant proteins.
  • Scientific understanding and working knowledge of CHO cell biology, metabolism, cell culture media and engineering principles for large scale recombinant protein production systems.
  • Working knowledge of statistical methods (design of experiment, multivariate data analysis) and tools (SIMCA, JMP, etc.).
  • Understanding of cell culture bioreactors including microbioreactors, bench-scale and pilot-scale bioreactors, and bioreactor scale-up principles from laboratory to large scale.
  • Proven track record of accomplishments in upstream process and technology development with a strong scientific publication and presentation track record.
  • Ability to direct the planning, execution, analysis, and documentation of all stages of cell culture process development.
  • Plan, execute, analyze, and communicate complex and critical data in a highly organized manner.
  • Excellent verbal, written communication, and interpersonal skills.
  • Ability to work effectively in cross-functional and matrixed team environment; collaborate with both internal and external partners including vendors.
  • Demonstrated ability for taking initiative, creativity, and innovation in problem solving.
  • Productivity and efficiency working in the laboratory.
  • Ability to deliver complex objective under aggressive timelines.
PREFERRED EXPERIENCE AND SKILLS:
  • Experience with cell culture media development.
  • Experience with high throughput microbioreactor systems and advanced in situ analytics for process monitoring and control.
  • Experience with state-of-the-art cell culture processes including intensified inoculum/fed-batch and perfusion process development.
  • Background in data science approaches related to cell culture and predictive modeling, e.g. metabolic flux (MFA) analysis, omics, machine learning; computational fluid dynamics, and experience integrating PAT efforts.
  • Experience with late-stage commercial process development, technology transfer, scale-down model qualification, and process characterization.
  • Knowledge of biologics CMC development cycle and scale-up/down in addition to tech transfer to GMP manufacturing site.
Required Skills:

Biodesign, Biodesign, Biological Engineering, Cell Cultures, Cell Line Development, Cell Physiology, Chemical Engineering, Clinical Trials, Computational Fluid Dynamics (CFD), Detail-Oriented, Downstream Process Development, Drug Delivery Technology, Drug Development, Expression Vectors, Interpersonal Relationships, Leading Project Teams, Mammalian Cell, Mammalian Cell Culture, Manufacturing Processes, Molecular Biology, Operational Efficiency, Pharmaceutical Formulations, Pharmaceutical Process Development, Physical Characterization, Stable Cell Lines {+ 1 more}

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 click here if you need an accommodation during the application or hiring process.

As an Equal Employment Opportunity Employer, we provide equal opportunities to all employees and applicants for employment and prohibit discrimination on the basis of race, color, age, religion, sex, sexual orientation, gender identity, national origin, protected veteran status, disability status, or other applicable legally protected characteristics.--As a federal contractor, we comply with all affirmative action requirements for protected veterans and individuals with disabilities.- For more information about personal rights under the U.S. Equal Opportunity Employment laws, visit: EEOC Know Your Rights EEOC GINA Supplement

We are proud to be a company that embraces the value of bringing together, talented, and committed people with diverse experiences, perspectives, skills and backgrounds. The fastest way to breakthrough innovation is when people with diverse ideas, broad experiences, backgrounds, and skills come together in an inclusive environment. We encourage our colleagues to respectfully challenge one another's thinking and approach problems collectively.

Salary range for this role is

$142,400.00 - $224,100.00

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 .

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

Employee Status

Regular

Relocation

Domestic

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

10/1/2026

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

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