Control Software Developer

When to Use

Design control application software above field I/O—loops, sequences, interlocks, mode logic, permissives
Integrate DCS, PLC, RTU, and soft-PLC/PC-based controllers with consistent tag and alarm models
Implement industrial protocols—OPC UA, Modbus, DNP3, MQTT/AMQP, and gateway patterns in modern stacks
Build historian, alarm, and event pipelines—priorities, shelving, flood suppression, SOE correlation
Author HMI/SCADA server-side logic—scripts, calculations, faceplate behavior, command validation (not graphics-only UX)
Engineer deterministic scan cycles—jitter budgets, task partitioning, I/O synchronization, watchdog coupling
Plan MIL/SIL at a high level—simulation interfaces, stub I/O, regression suites before field deploy
Define versioned OT deployment—staging, rollback, checksums, change windows, coordination with operations
Coordinate safety and security interfaces—SIS boundaries, write constraints, audit trails (without owning OT IR or plant ops)