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Human Health and performance DIRECTOR

Michelle A. Frieling

Michelle A. Frieling currently serves as the Director of the Human Health and Performance (HH&P) Directorate. In this role, she is responsible for integrating and leading a team of civil servants and contractors in the technical disciplines within the Directorate including human system risks, space medicine and clinical operations, biomedical and environmental sciences, human systems engineering and development, business administration, occupational medicine, and industrial hygiene in support of human space flight programs.

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Michelle A. Frieling
Michelle A. Frieling
NASA

Org Chart

Functional Organization Chart

Mar 9, 2026

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HH&P Organization Leaders

Rebecca Tures

Rebecca Tures

Human Health and Performance Deputy Director

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David Baumann

David Baumann

Human Research Program (HRP) Director

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Terri A. Blatt

Terri A. Blatt

Business and Information Systems Services Office (BISSO) Office Chief

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Gary E Beven, MD

Gary Beven, MD

Space Medicine Operations Division (SMO) Division Chief

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Bradley Files, Ph.D.

Bradley Files, PhD

Program Health and Performance Office (PHPO) Chief

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Official NASA Portrait of Kimberlee Prokhorov

Kimberlee Prokhorov

Human Systems Engineering and Integration (HSE&I) Division Chief

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Kevin MacNeill

Kevin MacNeill

Biomedical Research and Environmental Sciences (BRES) Division Chief

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Judith Hayes

Judith Hayes, PhD, MPH

Chief Science Officer

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Explore Human Health and Performance

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Our Organization

Explore our organization's functions and services.

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Mission and Goals

HH&P is the primary organization focused on enhancing crew health and performance and mitigating the risks associated with human spaceflight.

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Capabilities

All Human Health and Performance functions aim to achieve our mission, "HH&P capabilities enable optimization of human health and performance throughout all phases of spaceflight." 

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Products

Human Health and Performance provide unique products and services required to maintain astronaut health and performance during and after long-duration space exploration.

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Human System Risks

Risk is inherent in human spaceflight. However, specific risks can and should be understood, managed, and mitigated to reduce threats posed to astronauts.

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Education Outreach

HH&P offers a wide variety of educational opportunities ranging from short internships to in-depth research fellowships and NASA grants.