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Sr Associate Scientist Jobs (NOW HIRING)

Repligen

Sr. Associate Scientist

Marlborough, MA

The Sr. Associate Scientist is a hands-on R&D role focused on the development and evaluation of membrane-based separation technologies for downstream bio-processing, with an emphasis on ...

Repligen

The Sr. Associate Scientist is a hands-on R&D role focused on the development and evaluation of membrane-based separation technologies for downstream bio-processing, with an emphasis on ...

Gilead

Sr Associate Scientist, Biology

Foster City, CA

$126K - $164K/yr

We are seeking a skilled Sr. Associate Scientist to support pharmacokinetic (PK) bioanalysis of large molecules across discovery and early development programs. This individual will play a key role ...

Gilead

Sr Associate Scientist, Biology

Foster City, CA · On-site

$126K - $164K/yr

We are seeking a skilled Sr. Associate Scientist to support pharmacokinetic (PK) bioanalysis of large molecules across discovery and early development programs. This individual will play a key role ...

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How much do sr associate scientist jobs pay per hour?

As of Jul 17, 2026, the average hourly pay for sr associate scientist in the United States is $35.92, according to ZipRecruiter salary data. Most workers in this role earn between $27.88 and $40.87 per hour, depending on experience, location, and employer.

What types of cross-functional collaboration can a Sr Associate Scientist expect in their daily work?

As a Sr Associate Scientist, you will regularly collaborate with multidisciplinary teams, including research associates, principal scientists, project managers, and sometimes regulatory affairs or quality assurance staff. Your role often involves sharing experimental results, coordinating timelines, and integrating feedback from colleagues in related departments such as analytical chemistry or process development. Effective communication and teamwork are essential, as project success relies on the seamless integration of diverse expertise. This collaborative environment not only supports your immediate project goals but also provides valuable opportunities for professional growth and learning from peers.

What are Sr Associate Scientists?

Sr Associate Scientists are experienced professionals who conduct scientific research and experiments, often within industries like pharmaceuticals, biotechnology, or environmental sciences. They design and execute studies, analyze data, and help develop new products, processes, or technologies. Typically, they work under the guidance of more senior scientists but have substantial autonomy and may mentor junior staff. Their work often contributes to scientific publications, regulatory submissions, or product development milestones.

What is the difference between Sr Associate Scientist vs Associate Scientist?

AspectSr Associate ScientistAssociate Scientist
Required CredentialsBachelor's or Master's in relevant field; some roles may prefer PhDBachelor's or Master's in relevant field
Work EnvironmentLaboratory, research, and development settingsLaboratory, research, and development settings
Employer & Industry UsagePharmaceutical, biotech, and research organizationsPharmaceutical, biotech, and research organizations
Common Search & ComparisonYesYes

The main difference between a Sr Associate Scientist and an Associate Scientist lies in experience and responsibility. A Sr Associate Scientist typically has more experience, may lead projects, and contribute to experimental design, whereas an Associate Scientist supports research activities under supervision. Both roles are common in biotech and pharmaceutical industries, requiring similar educational backgrounds and working in laboratory environments.

What are the key skills and qualifications needed to thrive as a Sr Associate Scientist, and why are they important?

To thrive as a Sr Associate Scientist, you need a solid background in scientific research, data analysis, and experimental design, usually supported by a bachelor's or master's degree in a relevant field. Familiarity with laboratory information management systems (LIMS), advanced analytical instruments, and relevant regulatory or safety certifications is often required. Strong problem-solving abilities, attention to detail, and effective communication skills help you excel in collaborative research environments. These competencies ensure scientific rigor, regulatory compliance, and the successful advancement of research projects.
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Sr Associate Scientist jobs near you
Infographic showing various Sr Associate Scientist job openings in the United States as of July 2026, with employment types broken down into 1% As Needed, 67% Full Time, 30% Part Time, 1% Temporary, and 1% Contract. Highlights an 97% Physical, 1% Hybrid, and 2% Remote job distribution, with an average salary of $74,723 per year, or $35.9 per hour.
Sr. Associate Scientist

Sr. Associate Scientist

Repligen Corporation

Marlborough, MA • On-site

Full-time

Medical, Dental, Vision, Retirement, PTO

Posted 22 days ago

Repligen rating

7.6

Company rating: 7.6 out of 10

Based on 13 frontline employees who took The Breakroom Quiz

Job description

Make a global impact-join Repligen.
We're united by a mission to inspire advances in bioprocessing as a preferred partner in the production of biologic drugs that improve human health worldwide. No matter your role or background, at Repligen, you will play a key part in shaping some of the most innovative and life-changing therapies in the world. We foster a culture of purpose, collaboration, and shared success-where every voice matters and every contribution drives progress. Join us!
The Sr. Associate Scientist is a hands-on R&D role focused on the development and evaluation of membrane-based separation technologies for downstream bio-processing, with an emphasis on ultrafiltration and tangential flow filtration (TFF) applications. This position performs laboratory and pilot scale experiments with a high degree of independence, carrying out defined experimental plans to support product and process development including concentration, diafiltration, and purification of biologics, while troubleshooting issues and generating reliable, high-quality data. The role analyzes and interprets results, identifies performance trends, and communicates clear conclusions to support product design, scalability, and customer applications, including preparation of internal reports and supporting technical papers. Working closely with cross functional teams including R&D, Product Management, and Manufacturing, the Sr. Associate Scientist supports new product development, line extensions, and continuous improvement efforts within Repligen's filtration portfolio. Ability to accomplish goals with limited supervision while collaborating with colleagues and providing technical guidance as needed.
This role is expected to model our Leadership Behaviors-Integrity & Compliance, Customer Focus, Collaboration, Courage, Team Empowerment, and Accountability & Results-in all aspects of work.
Responsibilities
  • Execute laboratory and pilot-scale experiments to support development of membrane-based filtration products, with a focus on ultrafiltration and tangential flow filtration (TFF) applications for biologics processing
  • Independently carry out experimental plans, including system setup, operation, and troubleshooting of filtration hardware, ensuring consistent and reliable data generation
  • Generate, analyze, and interpret experimental data; identify trends, assess performance, and communicate clear, data-driven conclusions
  • Support development of downstream bioprocessing applications including protein concentration, diafiltration, and purification across varying conditions and scales
  • Troubleshoot membrane, device, and process performance issues and recommend practical, technically sound solutions
  • Prepare internal technical reports, data summaries, and supporting white papers to document findings
  • Collaborate with cross-functional teams to support product development, line extensions, and continuous improvement efforts
  • Maintain laboratory equipment and ensure proper operation while adhering to safety practices
  • Provide technical guidance and collaborate across the team

Required Qualifications
  • Bachelor's degree in chemical engineering, Chemistry, Biochemistry, or a related scientific or engineering discipline
  • 3-5+ years of relevant industry experience in bioprocessing, filtration, or related environments
  • Ability to execute experiments independently and manage multiple priorities with limited supervision
  • Strong data analysis and problem-solving skills
  • Ability to work effectively in cross-functional teams
  • Strong written and verbal communication skills including technical report writing

Preferred Qualifications
  • Hands-on experience with membranes, TFF cassettes (hollow fiber), ultrafiltration diafiltration, and/or tangential flow filtration (TFF) systems
  • Experience operating, troubleshooting, and maintaining laboratory or pilot scale equipment
  • Familiarity with downstream bioprocessing applications such as protein concentration, purification, or buffer exchange
  • Experience with membrane manufacturing development, filtration device manufacturing development, filtration device failure analysis.
  • Experience preparing technical reports and supporting white papers
  • Experience using statistical or data analysis tools (e.g., JMP, Minitab, Excel, or similar) for data evaluation, visualization, and trend analysis
  • Hands-on experience with analytical techniques such as UV/Vis, pH, conductivity, HPLC, FTIR, or similar methods for routine sample and process characterization

Physical / Laboratory Requirements
  • Hands on laboratory role requiring operation of pumps, tubing systems, and filtration equipment
  • Ability to lift up to 25-50 lbs. and work in a laboratory environment
  • Must follow established safety procedures and handle chemicals appropriately

This role is not eligible for employment-based immigration sponsorship. Applicants must be legally authorized to work in the United States without employer sponsorship.
Our mission is to inspire advances in bioprocessing as a trusted partner in the production of biologic drugs that improve human health worldwide. Focused on cost and process efficiencies, we deliver innovative technologies and solutions that help set new standards in bioprocessing. The estimated salary range for this role, based in the United States of America is $85,000-121,900. Compensation decisions are dependent on several factors including, but not limited to an individual's qualifications, location, internal equity, and alignment with market data. Additionally, employees are eligible to participate in one of our variable cash programs (bonus or commission) and eligible roles may receive equity as part of the compensation package. We offer a wide range of benefits such as paid time off, health/dental/vision, retirement benefits and flexible spending accounts. All compensation and benefits information will be confirmed in writing at the time of offer.

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