About Us

With headquarters in St. Louis, Missouri, Whelan Security is a privately-held, family-owned company providing contract professional security services across many diverse industries and vertical markets including corporate headquarters, commercial real estate properties, financial institutions, educational campuses, manufacturing and industrial facilities, retail shopping centers, residential communities, and sensitive government facilities throughout the United States.

Since opening our doors in 1949, Whelan has grown to become one of the largest security companies in the United States and is also recognized as one of the fastest growing, privately held companies in the country. Our success is built upon a culture focused upon our integrity-based core values, teamwork, a spirit of humility and doing what is right by our clients and for our employees.