Skip to main content
Parexel logo

Principal Scientist I - Synthetic Chemist, Process Development Engineering & Safety - FSP

Parexel

Multiple U.S. locationsFull-timeSeen 5 days agoSeen in employer's feed 5 days ago

See where you stand before you apply. No sign-up to start.

You apply on the posting's application page, with no Olive account needed.

Watch jobs like this.

Don't just apply. Show up ready.

Olive works from this exact posting.

At a glance

Compensation
No compensation found
Location
Multiple U.S. locations
Schedule
Full-time
Work Authorization
Not specified

Olive focuses on jobs in the United States, including remote roles you can work from there.

Job overview

Parexel seeks a Principal Scientist I to develop and optimize chemical process steps for pharmaceutical and specialty chemical projects at a client site in Rahway, New Jersey. The largely laboratory-based role supports process development from gram to multi-kilogram scale, including scale-up, troubleshooting, and delivery of process intermediates or APIs. It also involves planning, analyzing, documenting, and reporting on experiments.

Skills & qualifications

RequiredNice to have

Skills

Chemical Process Development, requiredProcess Scale-Up, requiredUnit Operations, requiredLaboratory Skills, requiredChemical Handling, requiredExperiment Execution, requiredData Generation, requiredData Analysis, requiredData Documentation, requiredGood Laboratory Practices, requiredChemistry, requiredProcess Robustness, requiredQuality Management, requiredYield Optimization, requiredEnvironmental Considerations, requiredLaboratory Safety, requiredComputer Proficiency, requiredMS Office, requiredOrganizational Skills, requiredInterpersonal Skills, requiredWritten Communication, requiredOral Communication, requiredCross-Functional Collaboration, requiredProcedure Compliance, requiredLaboratory Systems Improvement, requiredLaboratory Reactor Equipment, nice to haveMettler Toledo EasyMax/Optimax, nice to haveHPLC, nice to haveGC, nice to haveFTIR, nice to haveRaman, nice to haveFBRM, nice to havePVM, nice to haveKarl Fischer, nice to haveDSC, nice to haveDesign of Experiments, nice to haveAPI Crystallization, nice to haveAPI Isolation, nice to haveAPI Drying, nice to haveParticle Attribute Control, nice to have

Qualifications

PhD in Chemistry or Related Field, nice to haveMS in Chemistry or Related Field, nice to have3+ Years Pharma/Biopharma Experience, nice to haveProcess Safety Evaluations, nice to haveCalorimetry, nice to haveHazard Analysis, nice to havePHA or LOPA, nice to haveMathematical Modeling, nice to haveSimulation Tools, nice to haveAspen, nice to haveMATLAB, nice to haveMathematica, nice to have

Benefits

401(k) Match
Paid Time Off

Full job description

We are looking to fill a Principal Scientist I position working as a full-time employee of Parexel FSP on assignment onsite at one of our clients located in Rahway, NJ. This position offers full benefits, sick time, 401K, paid holidays, and paid time off. This position does not offer sponsorship.

Description

The Chemical Engineering Research and Development department of one of our clients in Rahway, NJ is seeking a motivated and technically focused chemist who is looking for an opportunity to develop and optimize chemical process steps combining a series of typical chemical engineering unit operations used in the specialty chemical and pharmaceutical industries (e.g. reactions, extractions, distillations, crystallizations, filtrations, drying). The individual would do this as part of project teams working together on chemical processes combining multiple chemical steps in order to bring new active pharmaceutical ingredients (APIs) through the R&D pipeline from early through late-stage development.

This position is largely a laboratory-based role to support chemical process development performed at scales spanning the range from grams to multi-kilogram scale in order to understand scale-up issues, improve process robustness, quality, safety, environmental footprint and yield, troubleshoot issues, optimize, and deliver process intermediates and/or APIs. This role requires the ability to work in the lab with a variety of chemicals, use an array of manual and automated laboratory reactors/equipment and process/analytical instruments. Deskwork will involve planning, analysis, and documentation of laboratory experiments, and writing clear and concise reports. The role offers fast-paced, hands-on research that requires a high degree of technical skills and contributions.

Qualifications

  • Principal Scientist I - PhD in Chemistry or closely related field (Biochemistry, Analytical Chemistry, Research Sciences, Material Sciences, etc.); or MS degree in Chemistry or a closely related field (Biochemistry, Analytical Chemistry, Research Sciences, Material Sciences, etc.) with 3+ years of professional experience in pharma/biopharma industry.

Required Skills and Experience

  • Demonstrated experience with chemical process development, scale-up, and unit operations including reactions, extractions, distillations, crystallizations, filtrations, and drying.

  • Strong laboratory skills with the ability to safely handle a wide variety of chemicals, execute experiments, and generate, analyze, and document data in compliance with safety and Good Laboratory Practices (GLP) expectations.

  • Knowledge of chemistry theory and practice, including process robustness, quality, yield, and environmental considerations.

  • Ability to work accurately and safely in a fast-paced, regulated laboratory environment with minimal supervision.

  • Proficiency with computers and experience using local and web-based software tools (e.g., MS Office, data analysis tools).

  • Strong organizational, interpersonal, written, and oral communication skills to effectively collaborate within cross-functional project teams.

  • Demonstrated ability to follow established procedures, policies, and guidelines to meet safety, environmental, and quality requirements.

  • Initiative and independence to develop, apply, and improve laboratory systems, methods, and best practices.

Desired Skills and Experience

  • Hands-on experience with laboratory reactor and process equipment, including automated systems such as Mettler Toledo EasyMax/Optimax.

  • Experience using in-situ or off-line analytical and characterization techniques such as HPLC, GC, FTIR, Raman, FBRM (Focus Beam Reflectance Measurement), PVM, KF, or DSC.

  • Familiarity with statistically designed experimentation, including Design of Experiments (DoE) methodologies.

  • Experience with API crystallization, isolation, drying, and particle physical attribute control at bench and kilo-lab scales.

  • Awareness of current Good Laboratory Practices (GLP) and/or Good Manufacturing Practices (GMP).

  • Experience with process safety evaluations, calorimetry, hazard analysis (e.g., PHA, LOPA), or environmentally sound process design.

  • Exposure to mathematical modeling, data analysis, or simulation tools (e.g., Aspen, MATLAB, Mathematica or similar).

  • Experience with PHA's, Layers of Protection Analysis or similar risk evaluation methodologies.

  • Flexibility to adapt to changing work assignments, priorities, and project timelines.

About Parexel

Parexel FSP includes the CMC Operations group. We provide pharmaceutical and biopharmaceutical companies with qualified and talented technical professionals to support the development and delivery of new therapies.

For results-driven and caring individuals who want to make a meaningful difference in the world, Parexel is trusted by life sciences companies to meet their long-term staffing needs for scientists and engineers and related professionals in discovery and development of novel therapies, keeping patients at the center of everything we do, and where an inclusive community helps you be your best, transforming any career into a life-changing achievement.

Come join us!

#LI-DK1

EEO Disclaimer

Parexel is an equal opportunity employer. Qualified applicants will receive consideration for employment without regard to legally protected status, which in the US includes race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or protected veteran status.

How this job compares

Set against the 2,065 open Scientist jobs on Olive Jobs, counted November 13, 2026.

Pay
  • This postingNot listed
  • US median$103–160K/yr1,038 salary ranges
  • US median$33–40/hr97 hourly ranges
Openings
Olive Jobs lists 17 open Scientist jobs in Oregon and 2,065 across the US. Under 1% of them nationwide are listed as remote or flexible.
Hiring the most across the US
Experience
This posting asks for at least 3 years of experience; Scientist postings that state a minimum ask for 3 years at the median (1,565 postings).
Education
969 of the 2,065 open Scientist jobs (47%) ask for a bachelor's degree or higher.

Counted across the open, public US postings on Olive Jobs on November 13, 2026. Figures based on too few postings are left out.

Prepare for this role

You've read the whole posting — now see how you match it.