Senior Associate Scientist - Protein Development

Build our future together:
At Regeneron, we use science and innovation to develop life-changing medicines for people with serious diseases. We are seeking a candidate to join our Protein Reagents Group within the Therapeutic Proteins department, supporting ongoing programs by purifying and biochemically characterizing protein reagents and antibodies. You'll work in a fast-paced, collaborative lab environment, ensuring high-quality outputs and clear, timely communication of results. This position offers the opportunity to contribute to a fast-growing, science-driven organization making a meaningful difference to patients worldwide.

When & where:
Location: Tarrytown, NY - on-site

Discover your role:

• Purifies protein reagents and antibodies using standard chromatography platforms and automated systems
• Performs purification and analytical chromatography, including affinity, ion-exchange (IEX), hydrophobic interaction (HIC), and size-exclusion (SEC)
• Characterizes proteins using Western blotting, SDS-PAGE, SEC, and UV/Vis spectrophotometry
• Enters, analyzes, and documents data in Benchling; prepares presentations and summaries for team review
• Communicates findings clearly and concisely to managers and cross-functional partners

This role requires:

• BS or MS in biology, molecular biology, protein chemistry, chemical engineering, chemistry, or a related field
• 2–4 years of relevant laboratory experience (industry or academic)
• Proficiency in protein characterization techniques (e.g., Western blot, SDS-PAGE, SEC, spectrophotometry)
• Strong foundation in protein chemistry
• Excellent organizational, verbal, and written communication skills

Preferred qualifications:

• Experience operating ÄKTA or comparable chromatography systems and associated software
• Familiarity with method development and troubleshooting across affinity, IEX, HIC, and SEC workflows
• Proficiency with Benchling and data analysis/visualization tools (e.g., Excel, GraphPad Prism)
• Experience preparing technical presentations and contributing to cross-functional project discussions

Core competencies:

• Detail-oriented with strong documentation practices
• Productive and proactive in a fast-paced, collaborative environment
• Problem-solver with a continuous improvement mindset
• Strong time management with the ability to handle multiple priorities

Tools & Technologies (a plus):

• AKTA/Unicorn or similar chromatography platforms
• Benchling and ELN systems
• UV/Vis spectrophotometers, SEC systems, gel imaging platforms

Does this sound like you? Apply now to take your first step towards living the Regeneron Way! We are committed to building a workplace with an inclusive culture. Regeneron is an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion or belief (or lack thereof), sex, sexual orientation, gender identity or expression, gender reassignment, marital or civil partnership status, civil status, pregnancy or parental status, age, disability, nationality, citizenship status, ethnic or national origin, membership of the Traveler community, familial status, genetic information, military or veteran status, or any other characteristic protected under applicable law. Where required, we will provide reasonable accommodation to applicants with known disabilities or chronic illnesses during the recruitment process, unless such accommodation would impose undue hardship.

Where necessary, we disclose salary ranges for roles in all countries in which we operate. The final offer will be determined within the relevant range based on the country of employment, specific role level, and your skills and experience. In some countries, collective bargaining agreements (CBAs) may apply and influence certain elements of pay or benefits. Regeneron offers a competitive and comprehensive total rewards package which may include, depending on country and role: annual bonuses or other incentive plans, equity awards, pension or retirement benefits, 401(k) company match, health and wellness programs, fitness centers, insurance benefits (e.g. medical, dental, vision, life and disability), paid time off, and family support benefits. For additional information about Regeneron benefits in the U.S., please visit . For other locations, additional information will be provided during the recruitment process. If you have any questions, please speak with your recruiter.

Please be advised that at Regeneron, we believe we do our best work when we are together. For that reason, many roles are required to be performed on‑site. Please speak with your recruiter and hiring manager for more information about on‑site expectations for your role and location.

As part of the recruitment process, certain background checks may be conducted in accordance with the laws of the country where the position is based. The purpose of such checks is to verify certain information prior to the commencement of employment such as identity, right to work and educational qualifications.

For jobs in Canada: this posting is for an existing position.

Salary Range (annually)

$80,300.00 - $131,100.00