Allied Universal Acquires Mulligan Security from Protos (Southfield Capital-backed Protos)

Protos Security Acquires Mulligan Security

January 5, 2021

Professional Services

Protos Security (a portfolio company of Southfield Capital) has acquired Mulligan Security to expand its self-perform direct guard and fire & life-safety capabilities. Mulligan's founder Kevin Mulligan and the senior leadership team will remain in place as Protos integrates Mulligan into its technology-enabled security platform.

Protos Security Acquires MG Security Services

September 1, 2022

Professional Services

Protos Security (a portfolio company of Southfield Capital) has acquired MG Security Services, a New York City–based provider of armed and unarmed security guard services, crisis management, fraud prevention and private investigations. The add-on expands Protos' East Coast footprint, scales its direct guard operations (MG employs over 1,200 guards) and furthers growth in end markets such as healthcare and commercial real estate.

Allied Universal Acquires South Carolina-Based American Security

May 16, 2022

Professional Services

Allied Universal has acquired American Security, a South Carolina–based regional security services provider founded in 1975. The acquisition adds more than 1,200 employees and strengthens Allied Universal's presence and service capabilities across the Southeastern United States (Alabama, Georgia, Kentucky, North Carolina, South Carolina, Tennessee and Virginia).

Allied Universal Acquires Five Security and Facilities Services Companies

May 20, 2025

Professional Services

Allied Universal completed five acquisitions in early 2025, adding Pinnacle Security, Diversified Maintenance Systems (DMS), Celar Security / Soltes Technology (Colombia), CI Security Specialists (CISS) and CDA, Inc. d/b/a MaxSent to its portfolio. The transactions expand Allied Universal's geographic footprint and service capabilities across guarding, facilities management, events security and security technology in the U.S. and South America.

Allied Universal Acquires MSA Security from GreyLion

September 20, 2021

Professional Services

Allied Universal has executed a definitive agreement to acquire New York–based MSA Security from private equity firm GreyLion. MSA, a provider of threat protection and explosive-detection K9 teams with revenue approaching $200 million and nearly 700 canine teams deployed worldwide, will expand Allied Universal’s specialized capabilities and national K9 program; terms were not disclosed.

Allied Universal (MSA Security) Acquires Elite Tactical Security Solutions

April 11, 2023

Professional Services

Allied Universal, through its MSA Security business, has acquired Elite Tactical Security Solutions to expand its security and canine-detection capabilities in the Las Vegas market. Elite Tactical’s 40 security professionals and 10 canine detection teams — along with an ATF-licensed canine training center in Henderson, Nevada — will be integrated into Allied Universal/MSA Security operations to support hospitality, events and commercial venue clients.