Case Studies Library

Sears Tower (now Willis Tower), Chicago, Illinois

Kroll Advisory Solutions was retained by Trizec, Inc. to conduct an independent threat assessment of the Sears Tower (renamed Willis Tower) property immediately following the September 11, 2001 tragedies. The primary objective of the assessment was to review all aspects of the base building security operation and develop new security measures consistent with the needs of this high profile, highly trafficked, symbolic structure. For Phase I, Kroll completed:

A physical survey of the property including the site, parking garage, loading dock, service entrances and corridors, building common areas, building lobbies, elevator core(s), roof, and mechanical, electrical and plumbing support facilities Interviews with property management personnel to discuss past criminal incidents and the overall security climate for the property A risk assessment of the facilities based upon known public information and information gathered from the property management group.

Inspection and evaluation of the currently installed electronic security systems to include access control and alarm monitoring, closed circuit television, intercom communications.

Trizec contracted Kroll to carry out recommendations contained in the threat assessment report and to continue with security systems and programs enhancements, including Emergency Preparedness.