Computerworld - Randy Vickers, the director of the U.S. Computer Emergency Response Team (US-CERT), has resigned from his position without any official explanation for the abrupt move.

Vickers' resignation last Friday was communicated via email to members of the Department of Homeland Security's (DHS) Office of Cybersecurity and Communications (CS&C).

The brief email, a copy of which was obtained by Computerworld, noted that Vickers' last effective day at the US-CERT was last Friday. The email said that Lee Rock, the deputy director for US-CERT, will serve as the interim director until a new one is named.