Logical Systems Inc. operates at the intersection of operational technology and industrial cybersecurity, defending control systems that run food processing plants, breweries, oil refineries, and water treatment facilities across North America and East Asia. The threat model here isn't theoretical - these are environments where a compromised PLC can halt production lines or worse, and where legacy protocols like Modbus and CIP weren't designed with adversarial actors in mind. LSI's 285-person team works across the full stack of industrial automation - ControlLogix, PlantPAx DCS, Siemens S7 and PCS7, Emerson DeltaV - integrating cybersecurity into systems that often predate modern threat landscapes.
The company's technical focus spans process engineering, electrical systems, and information security, with particular depth in Rockwell Automation platforms and SCADA/HMI environments. Their cybersecurity practice isn't bolted on - it's embedded in digital transformation projects that range from initial architecture through enterprise-scale rollouts. That means working with air-gapped networks, serial protocols, and decades-old Allen Bradley PLC5 and SLC500 systems alongside newer Ethernet/IP infrastructure, often within industries where downtime carries six-figure costs per hour.
Founded in 1985 and still led by founder Larry Bailey, LSI's longevity in systems integration gives them visibility into how industrial networks evolved from isolated islands to increasingly connected - and vulnerable - infrastructure. Their client base spans sectors under active threat: life sciences facilities handling sensitive IP, water systems classified as critical infrastructure, and metals operations running continuous processes. The work requires fluency in both OT protocols and IT security frameworks, translating between engineers who prioritize uptime and security teams modeling nation-state capabilities.