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Upstream Process Development Jobs (NOW HIRING)

Solid understanding of upstream processing including hands on experience in single-use bioreactor operations and perfusion technology either at Manufacturing scale or in process development of ...

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How much do upstream process development jobs pay per hour?

As of May 30, 2026, the average hourly pay for upstream process development in the United States is $26.51, according to ZipRecruiter salary data. Most workers in this role earn between $23.56 and $27.88 per hour, depending on experience, location, and employer.

What are the key skills and qualifications needed to thrive in Upstream Process Development, and why are they important?

Success in Upstream Process Development requires a strong background in biology, biochemistry, or chemical engineering, often with an advanced degree and experience in cell culture or fermentation techniques. Familiarity with bioreactors, process control systems, and analytical instrumentation, as well as knowledge of cGMP regulations, is essential. Critical thinking, problem-solving, and effective communication are important soft skills for optimizing processes and collaborating across multidisciplinary teams. These competencies ensure efficient development of scalable production processes, maintaining product quality and regulatory compliance.

What are some common challenges faced in upstream process development and how do teams typically address them?

One of the main challenges in upstream process development is optimizing cell culture conditions to consistently achieve high yields and product quality. Teams often encounter variability in biological systems and must troubleshoot issues such as contamination, scale-up inconsistencies, or nutrient limitations. Collaboration with analytical, downstream, and quality teams is essential to identify root causes and implement solutions. Regular data review meetings, cross-functional problem-solving, and continuous process improvement are standard practices to ensure robust upstream processes.

What is upstream process development?

Upstream process development refers to the optimization and scaling of biological production processes that occur before product harvesting. This primarily involves the cultivation of cells or microorganisms to produce a desired product, such as a protein or antibody, in bioreactors. Scientists in this field work on improving cell lines, culture media, and fermentation conditions to maximize yield and quality. Upstream process development is a critical early phase in biomanufacturing, laying the foundation for downstream processing and overall production efficiency.

What is the difference between Upstream Process Development vs Downstream Process Development?

AspectUpstream Process DevelopmentDownstream Process Development
FocusDevelopment of cell culture, fermentation, and bioreactor processesPurification, filtration, and formulation of bioproducts
Skills & CredentialsBioprocess engineering, molecular biology, biochemistryBioprocessing, chromatography, analytical chemistry
Work EnvironmentLaboratories, bioreactors, pilot plantsPurification facilities, labs, quality control
Industry UsageBiotech, pharmaceutical manufacturingBiotech, pharmaceutical manufacturing

Upstream Process Development focuses on creating and optimizing cell culture and fermentation processes to produce bioproducts. In contrast, Downstream Process Development involves purifying and finishing these products. Both roles are essential in biopharmaceutical manufacturing and require similar scientific backgrounds, but they specialize in different stages of bioprocessing.

More about Upstream Process Development jobs
What cities are hiring for Upstream Process Development jobs? Cities with the most Upstream Process Development job openings:
What states have the most Upstream Process Development jobs? States with the most job openings for Upstream Process Development jobs include:
Infographic showing various Upstream Process Development job openings in the United States as of May 2026, with employment types broken down into 25% Temporary, and 75% Contract. Highlights an 90% Physical, 3% Hybrid, and 7% Remote job distribution, with an average salary of $55,150 per year, or $26.5 per hour.
Associate Principal Scientist, Upstream Development

Associate Principal Scientist, Upstream Development

MSD

Rahway, NJ

Full-time

Medical, Dental, Vision, Retirement, PTO

Posted 10 days ago


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}

Preferred Skills:

Current Employees apply HERE

Current Contingent Workers apply HERE

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:

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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.

Learn more about your rights, including under California, Colorado and other US State Acts

The 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.

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.

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

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:

06/20/2026

*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.