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Your Environment. Your Health.

Postdoctoral Fellow in Mixtures Toxicology, Systems Toxicology Branch

Department of Health and Human Services
National Institutes of Health (NIH)
National Institute of Environmental Health Sciences (NIEHS)
Division of Translational Toxicology (DTT)
Systems Toxicology Branch (STB)
Research Triangle Park, North Carolina


The Division of Translational Toxicology (DTT) at the National Institute of Environmental Health Sciences (NIEHS), which is part of the National Institutes of Health (NIH), seeks postdoctoral trainees who want to build their careers in toxicological sciences to better understand how factors in our environment may impact our health. The DTT’s mission is to improve public health through data and knowledge development that are translatable, predictive, and timely. DTT strives to conduct innovative and rigorous toxicology research that aligns with real-world public health needs and to translate scientific findings into knowledge that can inform real-life individual and public health concerns. Much of DTT’s work is in support of the interagency National Toxicology Program.

Position Description

A postdoctoral position is available in the Systems Toxicology Branch in the Division of Translational Toxicology (DTT) at the National Institute of Environmental Health Sciences (NIEHS), Research Triangle Park, North Carolina. This is a discipline-specific non-laboratory position with a focus on mixtures toxicology. The fellow will have the opportunity to lead multiple mixture-based projects in a team science structure that involves input from chemists, pathologists, statisticians, and toxicologists with a wide range of expertise (e.g., neurotoxicity, genotoxicity, reproductive toxicity).

Projects will include in vitro and in vivo evaluation of environmentally relevant chemicals (e.g., per and polyfluoroalkyl substances) and non-chemical stressors, as well as complex mixtures (e.g., botanical ingredients). In their capacity as project lead, the fellow will design studies that will be conducted in contract laboratories, monitor study progress, analyze results, and report findings in peer reviewed publications. The fellow will use predictive models of mixture toxicity that incorporate dose-response data from individual chemicals and will work on developing and refining methods for complex mixture testing and data interpretation (e.g., sufficient similarity). Previous training in mixtures or computational toxicology is desirable but not required.

Presentation of ongoing work will be encouraged with an emphasis on developing skills in communicating science to diverse audiences. The fellow will be encouraged to participate in career development opportunities and engage in leadership activities at NIEHS and relevant societies (e.g., Society of Toxicology).


The DTT Fellows Training Program funds postdoctoral fellowships for typically up to three years. Stipends for NIH fellows are determined by the years of previous postdoctoral experience completed. Postdoctoral fellows are considered professionals-in-training and are not classified as NIH employees. Medical insurance is provided.


To be eligible for a postdoctoral training fellowship at the DTT, applicants may not possess more than five years of postdoctoral experience and must hold a Ph.D. or equivalent in toxicology or an allied science, M.D., D.V.M., or other equivalent professional degree. All applicants receive consideration without regard to race, religion, color, national origin, gender, sex, sexual orientation, physical or mental disability, political affiliation, age (with statutory exceptions), or any other non-merit factor.

How to Apply

Applications should be submitted by the closing date (see below) and include:

  • A one-page cover letter in which the applicant describes their background, how their doctoral training has prepared them for a fellowship, and what they hope to achieve if accepted into the program.
  • Curriculum vitae.
  • Names and contact information for three references.

Please submit your application to Cynthia V. Rider, Ph.D., by October 31, 2023.

The NIH is dedicated to building a diverse community in its training and employment programs.

Do not include your birth date, photograph, or social security number (SSN) on application materials. DHHS and NIH are equal opportunity employers.

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