Principal ML​/AI Cheminformatics Scientist

Role Summary

As a Principal ML/AI Cheminformatics Data Scientist within the Computational Absorption, Distribution, Metabolism, and Excretion (cADME) group in Pfizer’s Pharmacokinetics, Dynamics, and Metabolism (PDM) organization, you will apply data-driven approaches to address critical challenges in small-molecule drug discovery. In this role, you will develop, deploy, and continuously improve machine learning models for molecular property prediction and leverage Pfizer’s proprietary chemical and biological datasets to inform decision-making across hit-to-lead and lead optimization stages.

Your work will directly enable more efficient compound prioritization, improved prediction of ADME properties, and accelerated progression of discovery programs. Success in this position will be defined by the delivery of robust, validated computational models and workflows that generate actionable insights and measurable impact on project outcomes. You will collaborate closely with cross-functional PDM partners and external collaborators to integrate AI-driven approaches into discovery workflows and maximize the value of Pfizer’s industry-leading data assets.

• Drive scientific and technical advancement in PDM’s AI and cheminformatics capabilities by developing and delivering robust, validated workflows and algorithms that directly support drug discovery.
• Design, build, and deploy innovative cheminformatics and AI workflows for small molecule discovery, with clear deliverables including prioritized compound lists, well-defined chemical libraries, and actionable structure-activity relationship analyses.
• Collaborate closely with medicinal chemists, biologists, and data scientists to integrate computational approaches into experimental and analytical workflows, resulting in joint project milestones and co-authored publications.
• Continuously monitor and evaluate emerging advances in AI, cheminformatics, and computational drug discovery, proactively leading the adoption of promising new methodologies and leading internal workshops or training sessions.
• Develop novel algorithms and analytical strategies tailored to Pfizer’s proprietary datasets and key scientific questions, achieving validated models, software tools, and contributions to scientific literature or patent filings.

• PhD in Cheminformatics, Computational Chemistry, Bioinformatics, Data Science, or a closely related field and a minimum of 4 years of relevant drug discovery experience in a pharmaceutical or biotech environment, OR Master’s degree in the same areas with a minimum of 9 years of relevant experience.
• Experience applying AI methods to medicinal chemistry or cheminformatics challenges, including work with molecular representations, chemical fingerprints, generative models, transformer architectures, pretraining strategies, property prediction, virtual screening, and ADMET modeling.
• Strong proficiency in Python, with hands‑on experience using cheminformatics libraries and tools such as RDKit, Open Eye, Deep Chem, InChI, and SMILES/SMARTS.
• Proven track record of creatively applying computational techniques to address problems relevant to pharmaceutical research and development.
• Experience communicating effectively and collaborating with diverse teams.
• Experience delivering results in a fast‑paced environment while managing multiple priorities.

This is a hybrid role requiring you to live within commuting distance and work on site an average of 2.5 days per week. The annual base salary ranges from $ to $, and the position is eligible for participation in Pfizer’s Global Performance Plan with a bonus target of 15.0 % of the base salary and eligibility to participate in our share‑based long‑term incentive program.

• 401(k) plan with Pfizer matching contributions and an additional Pfizer retirement savings contribution
• Paid vacation, holiday, and personal days
• Paid caregiver/parental and medical leave
• Health benefits including medical, prescription drug, dental and vision coverage

U.S. work visa sponsorship (e.g., TN, O‑1, H‑1B) is not available for this role, now or in the future.

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. This position requires permanent work authorization in the United States.