Nex Systems
Person

Christopher Klein

PEP

Acting Deputy Assistant Secretary - Bureau of Arms Control and Nonproliferation since 28 Feb 2026.

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Summary

Christopher Klein is a career member of the U.S. Senior Foreign Service. He currently serves as acting Deputy Assistant Secretary for nuclear nonproliferation and commercial competitiveness. Prior to this assignment, he was a Senior Fellow and adjunct professor at the Institute for the Study of Diplomacy at Georgetown University. From 2021-2023, he served as Principal [...More on linked State Dept page]

Positions held1

  1. Since 28 Feb 2026

    Acting Deputy Assistant Secretary - Bureau of Arms Control and Nonproliferation

    Current

    United States

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