External · Cambridge, MA

Scientist II, Antisense/siRNA and Peptide Purification at External — Cambridge, MA

Full-timeCambridge, MA$117,000–$157,000/yearPosted 2026-07-01Apply on Workday

Full job description

About This Role

At Biogen, we are advancing science to transform patients’ lives. We are seeking a highly motivated Scientist II to join our Technical Development team in Cambridge, MA, focused on oligonucleotide (Antisense/siRNA) and Peptide Purification. This is an exciting opportunity to design and develop robust, scalable purification processes that directly impact clinical and commercial therapeutics. You will play a key role in advancing next-generation modalities by bridging early development with manufacturing, working in a highly collaborative, cross-functional environment. Your work will contribute to building state-of-the-art platform processes that improve product quality, scalability, and efficiently enabling delivery of innovative therapies to patients.

Who We Are:

We are a team of chemists and chemical engineers engaged in the design of innovative processes which supply new medicines to patients. We focus on developing safe, economical, sustainable, cost-effective, and robust processes to support clinical trials and the launch of new medicines across various drug modalities. We are driven by first principles science, data-driven decision-making, and collaborative teamwork.

What You’ll Do

  • Design, develop, and scale purification processes across development stages (early development through commercial)
  • Apply data-driven approaches (e.g., DoE) to characterize processes and define robust control strategies
  • Lead or support technology transfer of processes into GMP manufacturing
  • Troubleshoot process challenges and drive continuous improvement in process performance
  • Collaborate with Manufacturing, Analytical, Quality, Non-Clinical, and Regulatory teams to enable program advancement
  • Author technical reports and contribute to CMC sections of regulatory filings and respond to agency questions.

Who You Are

You are a hands-on purification scientist who thrives in a dynamic, team-oriented environment. You possess strong analytical skills, and a keen ability to apply statistical analysis to complex data. You have a natural curiosity and a passion for process development. Your technical writing and communication skills are excellent, enabling you to effectively present technical data and contribute to regulatory documentation.

Required Skills:

  • Ph.D. degree in chemical engineering, chemistry, or a related science with 0-3 years of experience
  • Master’s degree in chemical engineering, chemistry, or a related science with 4+ years of experience in pharmaceutical or biotech settings.
  • Bachelor’s degree in chemical engineering, chemistry, or a related science with 6+ years of relevant experience in pharmaceutical or biotech settings.
  • Experience in purification process development, preferably in an industrial environment.
  • Strong analytical skills and statistical analysis expertise.
  • Proficiency in technical writing and presenting technical data.

Preferred Skills:

  • Experience in developing processes for oligonucleotides, peptides, and/or proteins.
  • Familiarity with GMP manufacturing processes.
  • Collaborative mindset with experience working in cross-functional teams.

The base compensation range for this role is: $117,000.00-$157,000.00 Base salary offered is determined through an analytical approach utilizing a combination of factors including, but not limited to, relevant skills & experience, job location, and internal equity.

  • Medical, Dental, Vision, & Life insurances
  • Fitness & Wellness programs including a fitness reimbursement
  • Short- and Long-Term Disability insurance
  • A minimum of 15 days of paid vacation and an additional end-of-year shutdown time off (Dec 26-Dec 31)
  • Up to 12 company paid holidays + 3 paid days off for Personal Significance
  • 80 hours of sick time per calendar year
  • Paid Maternity and Parental Leave benefit
  • 401(k) program participation with company matched contributions
  • Employee stock purchase plan
  • Tuition reimbursement of up to $10,000 per calendar year
  • Employee Resource Groups participation

Why Biogen?