PLC Control Systems Engineer Contract Opportunity Location: Warrington OR Sellfafield OR Stockton Sector: ECandI / Nuclear / Regulated Industries Salary: Contract Rate Negotiable (INSIDE IR35) Start: ASAP I''m supporting one of our long-standing clients a specialist engineering business operating across regulated industries who are looking to strengthen their Control Systems team with an experienced PLC Engineer. This role will suit a detail-oriented engineer with proven experience in the design, development, testing, and documentation of PLC-based control systems. While nuclear sector experience is a strong advantage, they re open to talent from other highly regulated environments. Key Responsibilities: Design, develop, implement and test PLC-based control systems. Produce high-quality engineering documentation, including: User Requirements and Traceability (URS/RTM) Functional and System Design Specs (FDS/SDD) Software Specifications (SSS) Test Documentation (Module/Integration/System/Hardware) I/O Schedules, Alarm Lists, OandM Manuals Develop PLC software (IEC 61131 languages), ideally in Rockwell, Schneider, or Siemens platforms. Collaborate closely with SCADA, HMI, and database engineers to define and deliver control system architecture. Generate network diagrams and interface documentation with cyber security best practices in mind. Support and conduct in-house and on-site acceptance testing (FAT/SAT). Assist with installation, commissioning, and producing operato