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

As a Scientist, you will lead and execute technical work packages, working hands-on in the lab to design, run, and analyze experiments. You will contribute directly to the development of cutting-edge upstream processes, support internal and external collaborations, and mentor junior team members.

This role offers a unique blend of 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:
*** 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 $85,000-$107,000, 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…