Vector Security has closed the acquisition of Nashville-based ADS Security, whose presence in the Southeast combines with the Vector's footprint to establish a broader national service area.

Collectively both companies will have close to $20 million in recurring monthly revenue and a customer base of nearly 400,000 subscribers.

The ADS Security team will remain in their current roles with John Cerasuolo leading the ADS division and reporting directly to Vector Security President and CEO Pam Petrow. ADS Security will maintain its brand identity, becoming the fourth business unit under the Vector Security portfolio.

The combination of these two companies adds new branch operations for Vector Security in Alabama, Mississippi, Georgia, South Carolina and Tennessee. The acquisition also expands market presence for both companies in North Carolina, Kentucky and Florida

“We are very impressed with the successes and market presence ADS has built over the years,” Petrow said in a statement. "We have a great opportunity to take best practices from two amazing companies and build the best sales and service organization across our expanded footprint."

ADS was originally owned by the investor group Elmhurst Co., also of Pittsburgh. Barnes Associates Inc. served as financial advisor to ADS.