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Pfizer Senior Scientist, Crystallization Process Development in Groton, Connecticut

Why Patients Need You

Pfizer's purpose is to deliver breakthroughs that change patients' lives. Research and Development is at the heart of fulfilling Pfizer's purpose as we work to translate advanced science and technologies into the therapies and vaccines that matter most. Whether you are in the discovery sciences, ensuring drug safety and efficacy or supporting clinical trials, you will apply cutting edge design and process development capabilities to accelerate and bring the best in class medicines to patients around the world.

Role Summary

We are seeking a senior scientist to join the Crystallization Technology Laboratory as part of Chemical Research and Development (CRD) team in Groton. The successful candidate will be responsible for designing and developing robust scalable Active Pharmaceutical Ingredient (API) crystallization processes for use at pilot-plant and commercial scale. They will apply chemical engineering principles, computational modeling approaches, and lab-scale experimental techniques to gain process understanding and to optimize the processes for safety, efficiency, and robustness.

CRD, as part of Worldwide R&D in Pharmaceutical Sciences, is responsible for the development of process technology to manufacture active pharmaceutical ingredient's (API). CRD scientists engage in all facets of development from small-scale synthesis in support of medicinal chemistry programs, to the development of the commercial synthetic route. CRD chemists and engineers collaborate with manufacturing specialists for API production in kilo-lab and pilot plant facilities, as well as provide support for technology transfer to Pfizer manufacturing sites and third-party facilities.

The successful candidate will work on API project teams in the crystallization process design and development, technology transfer, and regulatory filing activities for new small molecule candidates. They will work closely with process chemistry, materials science, and drug product development colleagues to identify and optimize API target attributes. They will develop technology for clinical projects to deliver API that meets the targeted physical and chemical quality attributes by applying knowledge of crystallization and solid form science. Working as part of multidisciplinary teams, the scientist will develop robust and scalable processes suitable for transfer to a commercial manufacturing facility. The candidate will also improve capabilities of the group through the development and advancement of new technologies related to crystallization process development such as sono-crystallization, continuous crystallization, and integrated process control. They will develop and utilize computational models such as thermodynamic predictions, solid form modelling, and population balance models to facilitate design of crystallization processes. Given the dynamic team environment and fast-paced project timelines, strong interpersonal and communication skills are essential.

How You Will Achieve It

  • Apply crystallization process design and development fundamentals, modeling tools, and experimental skills using data-rich laboratory instrumentation to develop robust crystallization processes for API and intermediates.

  • Work at the interface with Drug Product Design, Material Sciences, Process Chemistry and Analytical Research and Development colleagues to identify the API target attribute profile and API impurity control strategy.

  • Select, develop, and apply new and existing process technologies to facilitate process design to achieve project goals.

  • Support technology transfer of drug substance processes to internal Pfizer API manufacturing facilities and external suppliers.

  • Work to understand the factors impacting API quality and thermodynamic properties like isolation, impurity purge, filtration, and drying

  • Contribute to the preparation of the Chemistry and Manufacturing Controls (CMC) section of the New Drug Application (NDA). Participates in data verification, PAI preparedness, and post submission query response. Collaborate and prepare internal research reports and technical presentation.

  • Champion the development of novel laboratory instrumentation and software modeling tools to improve process understanding. Leads the development and implementation of new and existing workflows and methodologies.

  • Remain current with the process engineering and chemistry literature. May collaborate and author external publications and present research at external conferences.

  • Publish and present research internally and externally to Pfizer.

  • Perform laboratory experiments and perform complex scientific data analysis.

  • Author and review technical documents, reports, production records, technology transfer reports.

  • Follow all Pfizer safety, training and laboratory research guidelines to work in compliance with all regulations and standard procedures.



  • PhD in Chemical Engineering or Chemistry with 0 - 4 years of relevant experience required or MS in Chemical Engineering or Chemistry with more than 6 years of industrial experience

  • Detailed knowledge of chemistry and chemical engineering principles related to crystallization and isolation unit operations

  • Excellent interpersonal and communication skills

  • Comfortable working in a highly innovative team environment and can effectively cope with change

  • Demonstrate exceptional team working skills to ensure the group as a whole is successful


  • Working knowledge of distillation, solubility, crystallization, and filtration predictive tools.

  • Experience with computational modelling tools such as ASPEN, Materials Studio, and DynoChem, Visimix, and COSMOTherm.

  • Working knowledge of UPLC, PXRD, NMR, DSC and TGA, and microscopy.

  • Knowledge of Design Expert or JMP

  • Working knowledge and application of MatLab, Python

  • Working knowledge of application of in-situ analysis tools to process understanding including: FTIR, FBRM, UV/Vis, Raman.

  • A good foundational understanding of organic chemistry.


Ability to work in a laboratory environment performing experiments in a laboratory fume hood. Ability to perform complex data analysis


Some travel associated with technology transfer to CRD pilot plant and PGS new product launch site may be required


Relocation Support Available

Eligible for Employee Referral Bonus

Last Day to Apply: July 5, 2022

Pfizer requires all U.S. new hires to be fully vaccinated for COVID-19 prior to the first date of employment. As required by applicable law, Pfizer will consider requests for Reasonable Accommodations.

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EEO & Employment Eligibility

Pfizer is committed to equal opportunity in the terms and conditions of employment for all employees and job applicants without regard to race, color, religion, sex, sexual orientation, age, gender identity or gender expression, national origin, disability or veteran status. Pfizer also complies with all applicable national, state and local laws governing nondiscrimination in employment as well as work authorization and employment eligibility verification requirements of the Immigration and Nationality Act and IRCA. Pfizer is an E-Verify employer.

Research and Development