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.

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.

• 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.

• 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.

• 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 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.

• Personal and Professional Development: Mentoring, leadership programs, internal seminar offerings
• Worklife Balance: Paid vacation, sick time, corporate holidays and community service day; 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…