Our Family of Businesses

We are a family-owned local business. The Mueller Family, who own and operate these businesses are proud of their heritage which includes three generations of U.S. Marines and three generations of the St. Louis Metropolitan Police Department. Our Directors and Managers have decades of experience in the industry.

ACF Alarm

Since 1974, ACF Alarm Company provides proficient, honest, friendly service & installation.

Sentry Security

Providing on-site security officers for commercial and residential customers for over 50 years.


Corporate employment background screening service. Let us verify that you're choosing the right one for your team.

United Fire Alarm System

Fire Alarm service company: UL Certified service, installation, & monitoring of Fire Alarm Systems

Community Outreach

The North Patrol Police & Business Partnership has focused on developing relationships throughout the 5th and 6th districts.