Industrial IT Systems Engineer

Ensure the administration, maintenance, and evolution of the Honeywell Experion PKS distributed control system (DCS) (and/or legacy TDC 3000 depending on the installed base) Supervise C300 controllers, operator stations, data servers, and associated industrial network infrastructure Drive migrations, updates, and system patches (OS, firmware, Honeywell applications) while guaranteeing production continuity Manage Safety Instrumented Systems (SIS) — Honeywell Safety Manager / FSC — in connection with SIL requirements Implement and maintain OT cybersecurity measures compliant with ISA/IEC 62443, in coordination with the group's IT/OT teams Provide level 2/3 technical support in case of control system incidents, with possible on-call duty Participate in engineering projects (extensions, revamping, scheduled shutdowns): writing specifications, FAT/SAT tests, commissioning Document system architecture, operating procedures, and recovery plans (backup/restore, disaster recovery) Interface with process, instrumentation, automation teams, and Honeywell support (maintenance contracts, TAC) Contribute to the training of operators and technicians on system evolutions Engineer (Master's degree) in automation, industrial IT, electrical engineering, or equivalent Experience Minimum 7 to 10 years of experience in critical industrial environments (refining, petrochemical, chemical, energy) Proven and significant expertise in the Honeywell ecosystem (Experion PKS imperative; TDC 3000, Uniformance, Safety Manager/FSC, Control Builder appreciated) Experience in SEVESO / ATEX / classified site environments strongly valued Technical skills Honeywell DCS architecture (C300 controllers, FTE network, redundant servers) Safety instrumented systems and SIS logic Industrial networks (OT), protocols (Modbus, OPC, Foundation Fieldbus/HART) Industrial cybersecurity (ISA/IEC 62443, network segmentation, OT patch management) Virtualization of control environments (VMware) appreciated Knowledge of process safety standards and Swiss/European regulatory requirements Duration: 12 months 5 days worked/week Resident Our client, a major player in the energy sector, operates a strategic refining site located in Switzerland, essential to the country's energy supply. As part of the maintenance of operational conditions and the continuous modernization of its control-command systems, we are looking for an Industrial IT Systems Engineer – Honeywell Expert. You will be responsible for ensuring the reliability, performance, availability, and cybersecurity of the site's DCS infrastructure.