Michael Sieber

Michael Sieber

Cybersecurity Director


Colonel Michael Sieber, U.S. Army, Retired, currently leads the defense market cybersecurity programs at Maximus, focusing on safeguarding mission-critical Defense IT systems, applications, and data. His extensive career in the U.S. Army, spanning over two decades, is marked by a unique blend of cybersecurity and information operations expertise.

Before his tenure at Maximus, Sieber culminated a distinguished 24-year career in the U.S. Army. His last military role was as the Chief Information Security Officer (CISO) and
Director of Cybersecurity Operations for Special Access Program Information Technology (SAP-IT) within the Office of the DoD Chief Information Officer. In this capacity, he was instrumental in fortifying the SAP IT ecosystem, aligning it with DoD policies, and enhancing its resilience against emerging threats.

A cornerstone of Sieber's military service was his role as an Army Information Operations (IO) officer since 2007. His career has been marked by strategic planning and execution of IO at tactical, operational, and strategic levels. Notably, at U.S. Cyber Command, he led the Strategic Effects and Special Programs Division (J39) at Ft. Meade, MD. His leadership extended to commanding roles at the Army’s 1st Information Operations Command at Ft. Belvoir, VA, including Battalion Commander and Brigade Executive Officer.

Sieber's proficiency in IO was further demonstrated through his positions as Deputy Chief of Staff for Strategic Effects and Deputy G39 at U.S. Army Europe, Deputy Cyberspace Branch Chief at U.S. Army G-3/5/7, and Regimental S7 at the Army’s 2nd Cavalry Regiment. These roles underscored his capability in integrating Information Operations strategies with broader military operations.

Sieber has multiple combat deployments in support of Operation Iraqi Freedom and Operation Enduring Freedom as an IO and an Infantry Officer. This field experience gives him a unique perspective on cyber and influence operations' real-world applications and implications.

He is a graduate of the Naval War College Command and Staff program and has a Master of Science in Information Operations from the Naval Postgraduate School, a Master of Arts in International Relations from the University of Oklahoma, and a Master of Arts in Human Resource Management from Webster University.

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