Titan Security Group (Quad‑C) Merges with Marksman Security Corporation

Quad‑C Management Makes Growth Investment in Titan Security Group

September 9, 2021

Staffing & HR

Charlottesville-based private equity firm Quad‑C Management completed a growth investment in Chicago-based Titan Security Group, a large provider of security staffing, electronic security systems and consulting. The capital will support Titan’s continued organic growth and management‑led buy‑and‑build strategy, with CEO David S. Pack remaining in place.

Marksman Titan Security Group Acquires Priebe Security Services

January 20, 2026

Professional Services

Marksman Titan Security Group, backed by private equity firm Quad-C, has acquired Priebe Security Services, an Austin-based contract security provider. The transaction adds over 450 employees and expands Marksman's presence in Central Texas while enhancing its manned guarding, mobile patrol and technology-enabled security capabilities; terms were not disclosed.

Titan Security Group Acquires Prudential Security's Security Staffing Operation

September 1, 2022

Professional Services

Titan Security Group, a Quad‑C Management portfolio company, has acquired the security staffing operation of Prudential Security, Inc., a Taylor, Michigan–based security solutions provider. The deal adds more than 700 team members and expands Titan's service footprint to 14 states; terms were not disclosed.

Markon (Sterling Portfolio Company) Acquires Millennium Corporation

February 20, 2026

Cybersecurity

Markon, a Sterling Investment Partners portfolio company, has acquired Millennium Corporation to expand full‑spectrum cyber capabilities across defense, intelligence, and federal civilian markets. The deal combines Markon’s enterprise delivery and program execution strengths with Millennium’s adversarial threat emulation, cyber operations, testing, training, and software capabilities as an add‑on to Markon’s platform.

Victor Capital Partners Acquires Four Regional Security Firms to Create National Security Services Platform

November 19, 2025

Professional Services

Victor Capital Partners has acquired four regional security companies and partnered with industry veterans Ken Fisher and Cal Horton to form a new national security services platform that will be branded in 2026. The platform combines manned guarding, patrol, alarm and video monitoring, investigations, background checks, and executive protection capabilities and is backed by financing from Third Point Capital Markets, Man Varagon Capital Partners and L Catterton Private Credit.

Tenex Capital Management Acquires Minuteman Security & Life Safety

August 7, 2023

Industrial Services

Tenex Capital Management has acquired Minuteman Security & Life Safety (Minuteman Security Technologies, Inc.) from Prospect Partners. Minuteman, an Andover, Massachusetts-based integrator of commercial security, fire, and life-safety systems with ~160 employees across 11 branches, will remain led by CEO Joe Lynch as Tenex looks to accelerate geographic expansion and entry into adjacent end markets.