Principal Scientist

Date: May 24, 2024

Location: US-CA-Petaluma, California, US

Company: Bausch Health

Bausch Health is a global company that develops, manufactures, and markets a differentiated product portfolio across multiple high-growth therapeutic areas including Gastroenterology, Generics, Neurology, Ortho Dermatologics, Medical Aesthetics and Dentistry.  We are delivering on our commitments as we build an innovative company dedicated to advancing global health.  Each day, Bausch Health products are used by over 150 million people around the world.


Our approximately 7,000 employees are united around our mission of improving people’s lives with our health care products.



The Principal Scientist designs and performs complex analytical experiments and procedures to support drug development. Designs and preforms characterization studies for drug development, example characterization using XRD, DSC, Raman spectroscopy, etc; identification and isolation of unknown impurities using LCMS, NMR, Preparatory-HPLC, etc. Designs and executes high-quality method development and validation studies for drug product development. Provides expert dissolution test method development to meet the drug product profile for orals in accordance to regulatory guidance. Provides technical leadership and management for a team of scientists and/or chemists in support of drug development activities under GLP and cGMP regulations.  Interprets and applies pharmaceutical guidelines, such as, ICH, CDER, USP, etc. to develop and validate analytical test methods in support of oral and other pharmaceutical drug product development. Experienced in discriminatory dissolution method development in accordance to FDA and ICH Guidelines. Provides troubleshooting advice based on job holder’s expert laboratory skills.  Provides leadership for Analytical Sciences’ projects and provides input in the proposal and budget process.



  • Ensures that day-to-day laboratory work is scientifically sound and in accordance with protocols, standard operating procedures, and regulations.
  • Identifies analytical test method goals to support the different product development stages and develops accurate and robust analytical test methods.
  • Designs and develops discriminatory dissolution test methods to support oral drug product development.
  • Designs and executes characterization studies using XRD, DSC, Raman Spectroscopy, and so on.
  • Performs complex analytical testing with accuracy and efficiency
  • Provides a high level of experimental design and data interpretation
  • Identifies problems and provides troubleshooting for analytical processes and analytical problems
  • Proactively reviews operations and contributes to development of standard operating procedures and training programs
  • Independently prepares Analytical Sciences’ validation protocols and reports
  • Effectively communicates with managers and staff inside and outside the department on project status and problems encountered
  • Ensures accurate calculations and documents work in compliance with Bausch Health procedures
  • Performs final review of notebooks and data for staff members



  • PhD with  8+ years experience in chemistry or related scientific field with extensive experience in analytical laboratory environment to support development of solid, semi-solid or dosage forms with complex matrices for oral pharmaceutical application.
  • Expert in analytical development to support pharmaceutical products development with emphasis in analytical chemistry techniques and applications
  • Ability to exercise independent intellectual judgment based on the individual’s specialized skills in the field of science
  • Able to train others
  • Advanced troubleshooting skills
  • Technical project leadership abilities
  • Safety minded in performance of duties
  • Quality minded with ability to perform work with accuracy and in accordance with established procedures
  • Effectively communicates with managers and team members
  • Organized and able to perform duties in a timely manner
  • Analytical
  • Innovative
  • Must have sufficient manual dexterity to perform laboratory testing in a manner to provide precise and accurate results and work in a safe manner
  • Vision must be suitable for performing detailed inspections
  • May be required to move items weighing up to 25 lbs.
  • May be required to stand for long periods of time to perform laboratory work
  • Individual is required to wear and use appropriate protective equipment in laboratory areas
  • Must be able to work with standard laboratory chemicals and biological materials under normal safety precautions
  • Must be able to work with computers, general laboratory instrumentation, and chromatographic instrumentation
  • Able to clearly and effectively communicate both verbally and in writing


As required by law, Bausch Health provides a reasonable range of compensation for roles that may be hired in the US. Actual compensation is influenced by a wide array of factors including but not limited to skill set, level of experience, and specific office location. For this role, the range of starting pay for this role is $130-170k.


Benefits package includes a Comprehensive Medical (includes Prescription Drug), Dental, Vision, Health Savings Account with company contribution, Flexible Spending Accounts, 401(k) matching, Discretionary time off, tuition reimbursement, parental leave, short-term disability, long-term disability, life insurance, accidental death & dismemberment insurance, paid holidays, Employee Assistance Plan, commuter benefit, recognition awards, voluntary benefits (including Identity Theft, Student Loan and Breast Milk Shipping), employee referral bonuses and employee discounts.

This position may be available in the following location(s): US - Petaluma, CA


Bausch Health Companies Inc. is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment regardless of race, color, religion, gender, national origin, age, sexual orientation, gender identity or expression, marital or veteran status, disability, or any other legally protected status. We are committed to building diverse teams, representative of the patients and communities we serve, and we strive to create an inclusive workplace that cultivates collaboration.


If a candidate needs a reasonable accommodation/adjustment due to physical or mental health impairment for any part of the application process, they are encouraged to send their request to  or call 908-927-1400 and let us know the nature of the request and their contact information. Please be sure to include the job requisition number. 


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