Sentinel provides armed and unarmed security services in California primarily through its subsidiary, Sentry. The company offers on-site guard protection, mobile patrol, and event security to businesses, residential communities, and public venues such as schools and houses of worship. Sentinel uses SilverTrac, a smartphone-based reporting tool, to allow guards to file reports and document patrols in real time. The company argues it differentiates its service by recruiting military and law enforcement veterans for clients with high-end security needs. Sentinel generates revenue by staffing security personnel at client sites on a contract basis, where revenue is determined by the number of service hours and the hourly billing rate. Because labor is the dominant expense, Sentinel operates in a labor-intensive business model. The company's growth strategy relies on the acquisition of regional security firms and existing client contracts. Following the sale of its USS subsidiary in February 2026 and the suspension of its body armor unit, Gladiator Solutions, Sentinel is focused on expanding its California footprint. The company plans to move into advanced security technologies, including unmanned systems and AI-assisted patrol tools, while targeting future acquisitions in electronic warfare and C5ISR defense sectors.