Perform site assessments, installation, commissioning, acceptance testing, startup, and production troubleshooting; diagnose electrical, controls, mechanical, networking, and low-level integration issues on live equipment and apply structured root-cause analysis to improve system reliability, reduce recurring downtime, and support equipment-uptime targets and service-level commitments. Develop, modify, troubleshoot, and commission PLC-based control systems using platforms such as Rockwell Studio 5000 Logix Designer, Siemens TIA Portal, or equivalent systems, including Ladder Logic, Structured Text, and/or Function Block programming as appropriate.