Chief Information Officer - U.S. Department of Defense

Mission
Protect. Connect. Perform.

Vision
To Deliver an Information Dominant Domain to Defeat our Nation's Adversaries

Key Focus Areas
Cloud. Communications. Cybersecurity. Enabling Artificial Intelligence and Data.

Welcome

Welcome to the Website for the Department of Defense Chief Information Officer (DoD CIO). The DoD CIO is the principal staff assistant and senior advisor to the Secretary of Defense and Deputy Secretary of Defense for information technology (IT) (including national security systems and defense business systems), information resources management (IRM), and efficiencies. This means that DoD CIO is responsible for all matters relating to the DoD information enterprise, such as cybersecurity, communications, information systems, and more. To learn more, please read about the DoD IT Advancement Strategy called Fulcrum, our organization charter, or browse this website.

DoD Private 5G Deployment Strategy

The Latest

At @NATO's Digital Policy Committee, PTDO CIO Katie Arrington emphasized Alliance data-centric security, #ZeroTrust, & #cloud security. She also advocated for a fast-track, agile acquisition process for critical communications & IS capabilities. #DoDCIO https://t.co/GGjvsU0BYn

DoD Cyber Leaders: Collaborate on Zero Trust for Operational Technology at JHU/APL, July 16-17, 2025. Best practices, resources, and hands-on workshops for securing critical infrastructure. Please see flyer to register! #ZeroTrust #OTSecurity #DoD #Cybersecurity #DoDCIO https://t.co/P6dyalH9y1

Revitalized Cyber Excepted Service (CES) online training modules on JKO: • CES 101: CES Workforce Orientation • CES 102: CES Leadership Orientation • CES 103: CES HR Elements Register @ https://t.co/WDjsUDXz6G https://t.co/a1qTDo5oLs

PTDO CIO Katherine Arrington discussed senior leader communications in testimony before the HASC subcommittee on Cyber, Information Technology, and Information Systems (CITI) on 8 May. "One Team, One Fight!" https://t.co/psDLuqDi9o

#JWCC is a critical tool in our work to increase warfighter lethality and resilience, PTDO CIO Katherine Arrington looked to the future of this program before the HASC subcommittee on Cyber, Information Technology, & Information Systems (CITI) on 8 May. "One Team, One Fight!" https://t.co/pF3iYncQus

DoD is on a journey to #ZeroTrust, PTDO CIO Katherine Arrington highlighted the Department's ongoing efforts in testimony before the HASC subcommittee on Cyber, Information Technology, and Information Systems (CITI) on 8 May. "One Team, One Fight!" #cybersecurity #ZT https://t.co/IXSrDXwEXq

During her testimony to the HASC CITI subcommittee, PTDO CIO Katherine Arrington discussed DoD's efforts to work with the VA on technology to secure Service member health data when it moves from the DoD to VA systems as a member leaves the active force. One Team, One Fight! https://t.co/ya2Kb8jWVY

Ms. Katie Arrington, PTDO CIO, on culture change at #TechNetCyber: “What I want is continuous monitoring, I want red teaming, I want people to continually evaluate. ... we need a culture of cybersecurity. We need a culture of #ZeroTrust. We need a culture of secure-by-design." https://t.co/kNZ17egfW4