Ozment was appointed assistant secretary for cybersecurity while Touhill will serve as deputy assistant secretary for cybersecurity operations and programs, DHS said in a Wednesday blog post.
Bobbie Stempfley, formerly acting secretary and deputy assistant secretary at DHS, will serve as deputy assistant secretary for cybersecurity strategy and emergency communications.
Ozment previously worked with other White House officials to develop and implement critical infrastructure cybersecurity guidelines.
He has held policy and operational roles at both the DHS and Defense Department.
Touhill, a 30-year military veteran, will be responsible for helping the DHS implement cyber initiatives such as the Continuous Diagnostics and Mitigation program and the National Cybersecurity and Communications Integration Center.
He most recently served as chief information officer and director of command, control, communications and cyber systems for the branch’s transportation command.
The CS&C office is part of DHS’ National Protection and Programs Directorate.