R 211513Z FEB 25  MARADMIN 080/25 MSGID/GENADMIN/CMC DCI WASHINGTON DC//  SUBJ/ANNOUNCEMENT OF THE MARINE CORPS CYBER GAMES FOR THE SPRING SERVICE-WIDE CAPTURE THE FLAG COMPETITION//  POC 1/E. B. SALZMAN/MAJ/DC I IMD/703-695-9551/ [email protected]//  POC 2/S. W. SCOTT/CWO4/DC I IMD/703-692-9315/ [email protected]//  GENTEXT/RMKS/1. Purpose. This message announces the Spring Service-wide Cyber Capture the Flag (CTF) competition taking place on 12–29 May 2025. The Spring event will be a Cyber Blue Zone CTF, focused specifically on Defensive Cyberspace Operations (DCO). The Deputy Commandant for Information (DC I), in partnership with the National Cyber Range Complex (NCRC) under the DOD Test Resource Management Center (TRMC), will organize a remote CTF event with SECRET access provided through the Joint Information Operations Range (JIOR) and the Joint Mission Environment Test Capability (JMETC) Multiple Levels of Security (MILS) Network (JMN). The CTF competition provides a venue where Marine cyberspace operators can compete in a tailored scenario to complete cyber challenges of varying difficulty, referred to as cyber flags.  2. Background. On 1 March 2018, the Marine Corps established an occupational field dedicated to the professionalization of cyberspace operators. In January 2020, discussions began for developing a setting in which Marine cyberspace operators could compete, share expertise, and hone tactics, techniques, and procedures to increase cyberspace effectiveness and readiness across the Fleet Marine Force (FMF) and Cyberspace Mission Force (CMF) on a secure network.  To address this challenge, DC I began hosting the Marine Corps Cyber Games and participating in CTF competitions.  These events have provided a venue to foster camaraderie among the community and opportunities for Marines to display their skills in a competitive environment. Additionally, as has been the case in past CTFs, highly qualified cyber volunteers from the Marine Corps Cyber Auxiliary will be on standby to train, educate, assist, and mentor Marines as they compete.  The intent of the Marine Corps Cyber Games is ultimately to accelerate excellence through competition.  3. Execution. The intended participants for this event are cyberspace operators from the DCO-IDM Companies and the Cyber Mission Force.  To find an open session, please go to the event registration site located at: https:(Slash) (Slash)intelshare. intelink.gov/sites/te/CyberBlueZone/ and register your team for this event. If you are unable to access the link, please email the following information to: Major Erik Salzman at  [email protected], CWO4 Steven Scott at [email protected], and Dr. David ‘Fuzzy’ Wells at [email protected]