Dr. Letteer is the Chief of the Cybersecurity Division of the Command, Control, Communications, and Computer (C4) Department at Headquarters, U.S. Marine Corps. As such, he oversees all efforts within Marine Corps for Cybersecurity (CY) and Information Assurance (IA), which includes Computer Network Defense (CND), Defensive Cyber Operations (DCO), Public Key Infrastructure (PKI), Electronic Key Management Systems (EKMS), and Certification & Accreditation (C&A). He is responsible for the overall creation, promulgation, execution, and oversight of the Marine Corps Cybersecurity program.
Dr. Letteer serves as the appointed Approving Official (AO) for the Marine Corps Enterprise Network (MCEN), which includes all networks and networked systems whether in garrison or tactically deployed. He is also the Functional Area Manager (FAM) for Marine Corps EKMS/KMI/PKI issues, and the Marine Corps Senior Information Security Official (SISO).
Prior to his arrival in the Marine Corps in 2003, Dr. Letteer worked in private industry as a federal contractor with Booz | Allen | Hamilton from 1994 to 1997 and SAIC from 1997 to 2003. He supported a variety of government clients in IA and systems security, including the Defense Information Systems Agency and the Department of the Interior.
Dr. Letteer served from 1973 to 1994 in the intelligence, security, and cybersecurity fields with the United States Air Force. His tours included Lackland and Goodfellow AFB in Texas, the National Security Agency in Maryland, Kadena AB on Okinawa, the Defense Language Institute in California, Teufelsbuerg Operations and Tempelhof AB in Berlin, and finishing his career at the National Air Intelligence Center at Wright-Patterson AFB in Ohio. He was an adjunct faculty member of the National Cryptologic School at NSA, teaching operational information system security. He is an adjunct faculty member of Capital College in Laurel, Maryland, teaching doctorate courses in the Information Assurance program. He is conversant in German and has rudimentary skill in Mandarin Chinese and Japanese.
Dr. Letteer received both his Doctor of Science (D.Sc.) in Information Assurance and Master of Science in Network Security (with honors) from Capitol College. He has a Bachelor of Arts in Political Science from the University of Maryland University College, a graduate certificate in Systems Management from the University of Southern California, and a Post-Graduate Intelligence Program Diploma in Strategic Intelligence from the Joint Military Intelligence College. He is a graduate of the Federal Executive Institute’s Leadership for a Democratic Society program. Dr. Letteer was selected as one of Federal Computer Week’s Federal 100 for 2005 and is listed in Who's Who in the World 1996, Who's Who in the Midwest 1994/1995, and Who’s Who among Students in American Colleges and Universities 2012.
Dr. Letteer’s military decorations from his military career include the Meritorious Service Medal, Joint Service Commendation Medal, Air Force Commendation Medal, Air Force Achievement Medal w/1 oak leaf cluster in lieu of subsequent award, Air Force Outstanding Unit Award w /4 oak leaf clusters, Air Force Good Conduct Medal w/ 1 silver oak leaf cluster in lieu of five subsequent awards, Berlin Army of Occupation Medal, and National Defense Service Medal.
Dr. Letteer is a Certified Information System Security Professional (CISSP), a Certified Chief Information Security Officer (C|CISO), NSA Information Assurance Methodology (NSA-IAM) certified, and Information Technology Infrastructure Library (ITIL) certified. He is Acquisition Level 1 Certified and an Associate member of the American Bar Association, participating on the Science & Technology Committee. Dr. Letteer was certified as a base Special Response Team member in the Air Force. He also holds an Instructor’s license in Bujinkan Budo Taijutsu (4th degree (yondan) black belt), as well as a 1st degree (shodan) black belt in Korean Tae Kwon Do.