555wMonroe building
mabb PIC building

Protective Services Unit

The Illinois State Police (ISP) Protective Services Unit (PSU) is currently responsible for law enforcement and protective services of two major State properties located in Chicago: the 555 Building, located at 555 W. Monroe Street and the Michael A. Bilandic Building (MABB), located at 160 N. LaSalle Street.

The 555 is a 16-story building that houses the offices and staff of Constitutional officers including the Governor and members of the Governor’s Cabinet. Also housed are the offices of multiple State agencies, boards, and commissions.

The MABB is a 21-story building that houses the Illinois Supreme Court, the Illinois Appellate Court 1st District, Court Clerk, as well as dozens of State agencies, boards, and commissions. The Supreme Court Marshal provides security to the 14th through the 20th floors of the MABB; however, ISP PSU personnel supplement those security efforts. ISP PSU is ultimately responsible for the entire police services/security umbrella within the MABB.

ISP PSU maintains its own uniformed police officers, security guards, and patrol vehicles. However, ISP uniformed employees and supervisors (Troopers) are assigned to the unit and are responsible for overseeing the day-to-day operations. There are security operations centers located in the 555 and in the MABB; both are staffed 24/7/365. Personnel that staff the operation desks/centers monitor radio traffic, cameras, phones, alarms panels, email requests, and walk-in inquiries. Certain government/building/business employees have 24-hour access to the buildings, so continuous security is required.