Associate Scientist – Bioreactor Application & Testing - Onsite – Marlborough, MA

As an Associate Scientist, you will support and execute technical work packages, working hands-on in the lab to assist in designing, running, and analyzing experiments. You will contribute to the development of innovative upstream processes, support internal and external collaborations, and gain valuable experience in applied research, process optimization, and customer-focused innovation.

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 innovation. In 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

• Support and perform on defined projects with clear goals in upstream product and process development, aligned with project goals and timelines.
• Assist in designing and conducting bioreactor experiments (e.g., perfusion, fed-batch) for mAbs, recombinant proteins, and other biologics.
• Help 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.
• Maintain laboratory inventory and perform regular maintenance on lab equipment.

What Will Convince Us:

• Bachelor's degree in biology, engineering (chemical, biomedical, or mechanical), or related discipline
• Minimum 1+ years relevant work experience
• Demonstrated ability to assist in designing and executing experiments, analyze data sets, and troubleshoot process issues.
• Operatively oriented, proactive in finding solutions, and positive mindset.
• Analytical and conceptual thinker able to solve complex problems.
• Good written and verbal communication skills for technical and cross-functional audiences.
• Proactive, results-oriented, and able to work both independently and collaboratively.
• Hands-on experience with bioreactor operations (single-use and/or stainless-steel systems) is a plus.
• Industry experience with mammalian cell culture and biologics manufacturing workflows is a plus.
• Passion for innovation in biomanufacturing.
• Strong troubleshooting and problem-solving skills.
• Collaboration and openness to new ideas.
• Identification with our core values: Sustainability, Openness, Enjoyment
• Good written and verbal communication skills for technical and cross-functional audiences.
• Proactive, results-oriented, and able to work both independently and collaboratively.
• Hands-on experience with bioreactor operations (single-use and/or stainless-steel systems) is a plus.
• Industry experience with mammalian cell culture and biologics manufacturing workflows is a plus.
• Passion for innovation in biomanufacturing.
• Strong troubleshooting and problem-solving skills.
• Collaboration and openness to new ideas.
• Identification with our core values: Sustainability, Openness, Enjoyment

We Value:

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 lab relocation activities.
• Work in a Biosafety Level 2 laboratory environment; occasional extended hours or weekends to support ongoing lab activities.

Compensation range is $70,000-$85,000, depending on experience, and qualifications

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 “Businesswomen’s 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 & Women’s 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.

Www.Sartorius.Com/Career

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 accommodationrequest@sartorius.com

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 accommodationrequest@sartorius.com

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. 
• www.sartorius.com/careers