Ralph Semmel Director
Dr. Ralph D. Semmel is the eighth director of the Johns Hopkins Applied Physics Laboratory (APL). As director, Dr. Semmel leads the nation’s largest university affiliated research center, which performs research and development on behalf of the Department of Defense, the Intelligence Community, NASA, and other federal agencies. The Laboratory has more than 9,000 staff members who are making critical contributions to a wide variety of nationally and globally significant technical and scientific challenges.
Erik Johnson Chief of Staff
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Tim Galpin Assistant Director, Programs; Chief Quality Officer
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Jerry Krill Assistant Director, Science and Technology; Chief Technology Officer
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James Miller Assistant Director, Policy and Analysis
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Lisa Blodgett Sector Head, Force Projection
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Robert Braun Sector Head, Space Exploration
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Kristine Frohman Department Head, Talent Services
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Donna Gregg Sector Head, Asymmetric Operations
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Minh Huebner Department Head, Business, Construction, and Facilities; Chief Financial Officer
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Ann Kedia Department Head, Communications; Chief Communications Officer
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Andrew Mara Department Head, National Security Analysis
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Andrew Merkle Department Head, Research and Exploratory Development
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Michael Misumi Department Head, Information Technology Services; Chief Information Officer
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Leonard Moss Department Head, Security Services; Chief Security Officer
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Paul Oostburg Sanz General Counsel
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