Monterrey Security was founded in 1999 to offer exceptional private security services based on industry best practices, cutting-edge technology, and the best-trained security professionals in the business including off-duty police officers and firefighters.

Our clients include professional sports franchises, major corporations, entertainment venues and other institutions.  Clients praise our customized, customer-driven approach, which has fueled our company’s rapid growth.

Based in Chicago, Monterrey Security provides services across the Midwest and around the globe.

Licensing and Certification


Monterrey Security is fully licensed by the State of Illinois Department of Professional Regulations as a Security Agency, Security Contractor and a Private Detective Agency. Our firm also holds an Indiana Security Guard Agency License from the State of Indiana Professional Licensing Agency.

A minority-owned firm, Monterrey Security is certified by the City of Chicago as a minority-business enterprise (MBE). Monterrey Security is also actively pursing federal 8(a) certification as a minority-owned business.

We have received Homeland Security Infrastructure Protection certification from the U.S. Department of Homeland Security.

All our guards receive State issued permanent employee registration cards. The classroom and field training our guards receive surpasses local state requirements. Since all our armed guards are off-duty law enforcement officials, they are certified by the state to carry concealed firearms, and receive annual re-certification. In addition, individual staff hold certifications in occupational safety and health, construction safety, hazardous materials handling, crowd control management and evacuation planning.