Senior Scientist

Senior Scientist - Upstream MSAT (Manufacturing Sciences and Technology)

Location: Andover, MA

Schedule: Monday - Friday, 9:00 AM - 5:00 PM

Minimum Education & Experience

• A minimum of a Bachelor's degree in a relevant scientific discipline (e.g., Biochemical Engineering, Biotechnology, Biology, or related field) is required.
• PhD and Master's degree holders are welcome.
• 6+ years of experience in bioprocessing, with a focus on mammalian cell culture and bioreactor operations.

Position Summary

As a Senior Scientist in the Upstream Mammalian MSAT team, you will play a pivotal role in supporting Pfizer's late-stage commercial biopharmaceutical and vaccine production. You will be responsible for process troubleshooting, continuous improvement, and second-generation process development. Your work will directly support laboratory-scale development, technology transfer, and commercial manufacturing at Pfizer and partner sites.

This role requires a strong foundation in mammalian cell culture, bioreactor engineering, and data analysis. You will be recognized as a technical expert, contributing to innovative process solutions and mentoring junior team members.

Key Responsibilities

• Lead upstream process development and optimization using mammalian cell culture systems.
• Operate and troubleshoot bioreactors in batch, fed-batch, and perfusion modes.
• Design and execute experiments to support process improvements and scale-down modeling.
• Collaborate with manufacturing teams to support technology transfer and commercial production.
• Apply statistical tools (e.g., DoE) and data analytics to interpret complex datasets.
• Ensure compliance with cGMP standards and contribute to regulatory documentation.
• Mentor junior scientists and contribute to cross-functional project teams.

Required Skills & Expertise

• Expertise in mammalian cell culture and bioreactor operation.
• Strong background in biochemical engineering and process monitoring.
• Proficiency in experimental design, data analysis, and laboratory automation.
• Hands-on experience with laboratory equipment and automation systems.
• Familiarity with control systems, data acquisition, and regulatory requirements.
• Excellent communication skills and the ability to work independently and collaboratively.

Pay and Benefits

The pay range for this position is $55.00 - $65.00/hr.

Eligibility requirements apply to some benefits and may depend on your job

classification and length of employment. Benefits are subject to change and may be

subject to specific elections, plan, or program terms. If eligible, the benefits

available for this temporary role may include the following:

• Medical, dental & vision
• Critical Illness, Accident, and Hospital
• 401(k) Retirement Plan - Pre-tax and Roth post-tax contributions available
• Life Insurance (Voluntary Life & AD&D for the employee and dependents)
• Short and long-term disability
• Health Spending Account (HSA)
• Transportation benefits
• Employee Assistance Program
• Time Off/Leave (PTO, Vacation or Sick Leave)

Workplace Type

This is a fully onsite position in Andover,MA.

Application Deadline

This position is anticipated to close on Jun 6, 2025.

About Actalent

Actalent is a global leader in engineering and sciences services and talent solutions. We help visionary companies advance their engineering and science initiatives through access to specialized experts who drive scale, innovation and speed to market. With a network of almost 30,000 consultants and more than 4,500 clients across the U.S., Canada, Asia and Europe, Actalent serves many of the Fortune 500.

The company is an equal opportunity employer and will consider all applications without regard to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.

If you would like to request a reasonable accommodation, such as the modification or adjustment of the job application process or interviewing due to a disability, please email ... for other accommodation options.