We are recruiting for a Senior EC&I Engineer to work on either a permanent basis, or long term contract outside IR35, in the Chorley area. Our client is seeking Senior EC&I Engineers (or Principal EC&I Engineers/Lead EC&I Engineers) from a nuclear or defence background. Pay/Benefits: The role is working a 4 day working week from Monday to Thursday (with Friday, Saturday and Sunday as weekend). For the permanent EC&I Engineers: £(phone number removed) (depending on level of experience) per annum plus 25 days' holiday and bank holidays, pension, healthcare and death in service. For the contract EC&I Engineers: £51-61 Ltd (Outside IR35) or Umbrella/PAYE equivalent. Duties/Experience for the Senior EC&I Engineer role: Execute engineering tasks within allocated budgets and timelines, promptly identifying deviations from the agreed project baseline in terms of scope, cost, or schedule. Assist the Lead Engineer in tracking the progress of engineering activities and projecting their completion timelines. Senior EC&I Engineer Responsibilities Develop conceptual, schematic, and detailed 3D models and drawings, ensuring design considerations address operational, maintenance, manufacturing, construction, and installation requirements. Integrate safety principles, including both conventional and nuclear safety, into the design process to ensure robust engineering solutions. Create design risk assessments to identify potential hazards across the product lifecycle and propose effective mitigation strategies to address these risks. Perform preliminary calculations to support the early stages of design development, with subsequent validation by specialist Stress Engineers. Collaborate closely with Stress Engineers to define analytical requirements and loading scenarios for verifying design integrity. Generate detailed documentation and drawings to support the lifecycle development and validation of engineering solutions. Establish and manage the physical, functional, and performance interfaces between engineering components, ensuring effective communication and control of interdependencies. Design and develop mock-ups, prototypes, and testing rigs to verify and refine engineering solutions. Prepare technical documentation to demonstrate compliance with relevant legislation, regulations, and standards Ensure adherence to configuration management practices to effectively control 3D models, drawings, and associated documentation. Promote cost-efficiency through value engineering and remain informed about emerging technologies and their potential application to ongoing and future projects. About the Company: An engineering firm with over 40 years of expertise, specializing in delivering advanced solutions for the nuclear and defence sectors. Due to the role working in Nuclear/Defence sectors, applicants must either already have SC Clearance, or be willing/able to achieve this level of clearance. If you are interested in applying for the Senior EC&I Engineer role, please press APPLY NOW