Scientist – Bioreactor Application & Testing Onsite – Marlborough, MA

The Application & Testing Lab Bioreactor Technologies in Marlborough specializes in cultivating mammalian and microbial systems to generate high-quality data that advances the development of Sartorius bioreactor solutions. Our team conducts rigorous process testing to optimize performance validate new designs and produce market-relevant datasets that support product close collaboration with customers field teams and global R&D groups we translate experimental insights into practical solutions that enable more efficient and scalable bioprocessing.

What you will accomplish together with us:

• Plan execute and drive experimental work packages in upstream process development aligned with project goals and timelines.
• Design and conduct bioreactor experiments (e.g. perfusion fed-batch) for mAbs recombinant proteins and other biologics.
• Optimize cell culture parameters for various mammalian cell lines (e.g. CHO HEK) using Sartorius next-generation bioreactor systems.
• Analyze and interpret experimental data ensuring accurate documentation and reporting.
• Collaborate with cross-functional teams including downstream process development automation and analytics.
• Participate in technology transfer activities to internal and external partners.
• Contribute to exploration and implementation of new technologies in bioprocessing to advance the state-of-the-art.
• Manage train and provide coverage for Associate Scientists and technicians as needed.
• Represent Sartorius in technical discussions with customers collaborators and external expert groups.

What will convince us:

Education & Experience

• Ph.D. in Biochemical Engineering Chemical Engineering Biotechnology or related field; M.S. with 4 years relevant industry experience or Bachelors degree with 7 years relevant industry experience.
• Hands-on experience with bioreactor operations (single-use and/or stainless-steel systems).
• Demonstrated ability to design and execute experiments analyze complex data sets and troubleshoot process issues.
• Industry experience with mammalian cell culture and biologics manufacturing workflows.
• Experience in mentoring and training junior scientists or technicians.
• Familiarity with GMP principles regulatory guidelines (FDA EMA ICH) and technology transfer is a plus.

We value:

• Analytical and conceptual thinker able to solve complex problems.
• Strong organizational skills with the ability to manage multiple projects.
• Excellent written and verbal communication skills for technical and cross-functional audiences.
• Proactive results-oriented and able to work both independently and collaboratively.
• Passion for innovation in biomanufacturing.
• Strong troubleshooting and problem-solving skills.
• Collaboration and openness to new ideas.
• Alignment with Sartorius core values: Sustainability Openness Enjoyment.

Travel & Work Conditions

• Travel up to 10% domestic and international as required for internal meetings customer collaborations and conferences. Up to 50% for the rest of 2025 to support with lab relocation activities.
• Work in a Biosafety Level 2 laboratory environment; occasional extended hours or weekends to support ongoing lab activities.

Total compensation range is $85000-$107000 depending on qualification experience and location.

What We Offer

As a growing global life science company with our stock listed on the German DAX and TecDAX Sartorius offers a wide range of benefits:
Personal and Professional Development: Mentoring leadership programs internal seminar offerings
Worklife Balance: Paid vacation sick time corporate holidays and community service day; as well as flexible work schedules
Making an Impact Right from the Start: Comprehensive onboarding including a virtual online platform
Welcoming Culture: Mutual support team spirit and international collaboration; communities on numerous topics such as Coaching Agile Working and a Businesswomens Network
Health & Well Being: Wide selection of health and well-being support such as a variety of medical plans to choose from dental vision EAP and other wellness programs.
Intelligent Working Environment: Working in smart buildings with the latest technology and equipment.

Retirement Savings Plan: 401 k (with generous company match)
Flexible Spending: HSA FSA (dependent care & healthcare spending) Transportation Commuter Account
Company Paid Benefits: Basic Life Insurance AD&D EAP Family Planning & Womens Health Health Advocate
Additional/Optional: Supplemental Life Insurance (employee spouse & dependents) Legal Services LTD & STD Critical Illness Insurance Student Loan Tuition Refinance Service

Sartorius is an equal opportunity employer and will consider all qualified applicants for employment without regard to race color religion sex national origin age protected veteran status disability or based on status in any other protected group of class.

Please view equal employment opportunity posters provided by OFCCP here.

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Sartorius is part of the solution in the fight against cancer dementia and many other diseases. Our technologies help translate scientific discoveries into real-world medicine faster so that new therapeutics can reach patients worldwide. We look for ambitious team players and creative minds who want to contribute to this goal and advance their careers in a dynamic global environment. Join our global team and become part of the solution. We are looking forward to receiving your application.

We look forward to receiving your application.

you are a qualified individual with a disability or a disabled veteran and are unable or limited in your ability to use or access our website you may request a reasonable accommodation to express interest in a specific opening. You can request reasonable accommodation by e-mail at

Sartorius is an equal opportunity employer and will consider all qualified applicants for employment without regard to race color religion sex national origin age protected veteran status or disability or based on status in any other protected group of class.

If you are a qualified individual with a disability or a disabled veteran and are unable or limited in your ability to use or access our website you may request a reasonable accommodation to express interest in a specific opening. You can request reasonable accommodation by e-mail at

About Sartorius

Sartorius is part of the solution in the fight against cancer dementia and many other diseases. Our technologies help translate scientific discoveries into real-world medicine faster so that new therapeutics can reach patients worldwide.

We look for ambitious team players and creative minds who want to contribute to this goal and advance their careers in a dynamic global environment.

Join our global team and become part of the solution. We are looking forward to receiving your application.
Experience:

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