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**Job Function: **
Discovery & Pre-Clinical/Clinical Development
**Job Sub Function: **
Biotherapeutics R&D
Job Category:
Scientific/Technology
All Job Posting Locations:
Malvern, Pennsylvania, United States of America
Job Description:
Employer: Janssen Research & Development, LLC
Job Title: Senior Scientist, Downstream Process/Antibody-Drug Conjugation
Job Code: A011.9366
**Job Location: **Malvern, PA
Job Type: Full-Time
Job Duties: Support and serve as lead for process development of Antibody-Drug Conjugates (ADCs), Radio-Ligand Therapies (RLTs), Immune-Stimulating Antibody Conjugates (ISACs), siRNA antibody conjugates within the API-Protein group. Lead method and process development activities, process characterization studies, scale-up and tech transfer activities to support large scale GLP and GMP batch manufacturing. Lead the design and execution of development studies to identify and determine appropriate conditions and ranges of critical process parameters for bioconjugation reactions, chromatographic purification, and several types of tangential flow filtration approaches. Lead the design of experiments, execute planned experiments, optimize process steps to the target process scale at laboratory scale, and participate in the non-GMP and GMP pilot-scale. Record and analyze experimental data, verify data integrity and accuracy, and summarize and report findings. Author technical protocols, reports and regulatory filings. Participate in scoping of laboratory expansion, engage with vendors to source equipment and onboard new instrumentation for ADC lab build activities. Lead and guide junior scientists to execute various studies for ADC projects, ensure timely completion of deliverables, engage department and global leadership to seek project advancement endorsements, and author technical project development (PD) reports.
Requirements: Employer will accept a Ph.D. degree in Chemistry, Chemical Engineering, Biochemistry or related field and 3 years of experience in the job offered or in a Senior Scientist, Downstream Process/Antibody-Drug Conjugation-related occupation.
This job posting is anticipated to close on 8/3/2026.
Johnson & Johnson is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, age, national origin, disability, protected veteran status or other characteristics protected by federal, state or local law. We actively seek qualified candidates who are protected veterans and individuals with disabilities as defined under VEVRAA and Section 503 of the Rehabilitation Act.
Johnson & Johnson is committed to providing an interview process that is inclusive of our applicants’ needs. If you are an individual with a disability and would like to request an accommodation, please contact us via https://www.jnj.com/contact-us/careers or contact AskGS to be directed to your accommodation resource.
Subject to the terms of their respective plans, employees are eligible to participate in the Company’s consolidated retirement plan (pension) and savings plan (401(k)).
This position is eligible to participate in the Company’s long-term incentive program.
Subject to the terms of their respective policies and date of hire, employees are eligible for the following time off benefits:
• Vacation –120 hours per calendar year
• Sick time - 40 hours per calendar year; for employees who reside in the State of Colorado –48 hours per calendar year; for employees who reside in the State of Washington –56 hours per calendar year
• Holiday pay, including Floating Holidays –13 days per calendar year
• Work, Personal and Family Time - up to 40 hours per calendar year
• Parental Leave – 480 hours within one year of the birth/adoption/foster care of a child
• Bereavement Leave – 240 hours for an immediate family member: 40 hours for an extended family member per calendar year
• Caregiver Leave – 80 hours in a 52-week rolling period10 days
• Volunteer Leave – 32 hours per calendar year
• Military Spouse Time-Off – 80 hours per calendar year
• This position is eligible for benefits to include medical, dental, vision and time off, as well as any others as provided for in the applicable Collective Bargaining Agreement.
• For additional general information on Company benefits, please go to: - https://www.careers.jnj.com/employee-benefits
**Required Skills: **
Preferred Skills: