Southfield Capital-backed Protos Security Acquires AT-RISK International to Expand Global Protective Services

Security Services Holdings LLC, operating as Protos and a portfolio company of Southfield Capital, announces the acquisition of AT-RISK International, a Washington D.C.-based provider of executive and general protective services, intelligence, and risk consulting. The deal, announced on April 17, 2026, marks a strategic step in Protos’ plan to build a comprehensive, software-enabled integrated protection platform with global reach.

While financial terms were not disclosed, the acquisition involves a full ownership stake in AT-RISK International, founded in 2013. The integration aims to combine AT-RISK’s specialized protective services and intelligence capabilities with Protos’ existing tech-enabled managed security services, enhancing the company’s ability to meet complex security demands.

Protos has established itself as a leading managed security services provider in North America, offering physical guarding, off-duty officers, specialized services, and remote monitoring through a unique managed services model. This model provides clients access to a broad and agile network of security providers, supported by real-time data insights.

AT-RISK International brings expertise in risk consulting, investigations, threat assessments, global risk monitoring, and protective services including executive, residential, event, and asset protection. These capabilities complement Protos’ platform and position the combined entity to address rising demand for intelligence-led, end-to-end security solutions among enterprise and high-net-worth clients.

Mark Hjelle, CEO of Protos, states, “This acquisition marks an important milestone in our growth strategy as we look to continue expanding our addressable market and tap into additional high-growth areas. AT-RISK’s specialized capabilities perfectly complement our existing platform, and our combined offering better equips us to continue providing industry leading solutions that allow our clients to navigate their evolving security needs.”

Brandon Pinderhughes, Partner at Southfield Capital, adds, “Protos continues to execute on its disciplined acquisition strategy focused on building a scaled, differentiated provider of protection solutions. The addition of AT-RISK represents an important step in this evolution, and we are excited to continue supporting Mark and the Protos team in this next phase of the Company’s growth story.”

The acquisition strengthens Protos’ market position as a leading provider of tech-enabled managed security and specialized protective services in North America, while expanding its global footprint through AT-RISK’s international presence. The combined platform enhances service offerings with executive, residential, event, and asset protection, integrated with intelligence-led risk consulting and threat assessment capabilities.

Operational synergies include integrating AT-RISK’s intelligence and risk assessment functions into Protos’ managed services, improving data sharing and analytics for proactive threat detection, and unifying training and operational protocols to ensure service consistency. Cost efficiencies are expected through consolidation of administrative functions, streamlined technology platforms, and optimized procurement.

Industry trends show increasing demand for integrated, intelligence-driven security solutions as clients face evolving and complex threats. This acquisition positions Protos to compete more effectively against smaller or less integrated providers, potentially accelerating consolidation in the security services sector.

Integration challenges include aligning corporate cultures, merging technology platforms for seamless intelligence sharing, maintaining service quality during transition, and managing regulatory compliance across jurisdictions.

Looking ahead, Protos plans to leverage the expanded platform to accelerate growth, enhance client retention, and increase wallet share by offering a broader portfolio of specialized security services. Regulatory approvals and integration processes are underway, with Southfield Capital continuing to support Protos’ strategic expansion.