Principal / Senior Control and Instrumentation Engineer We are seeking an experienced Principal or Senior Control and Instrumentation Engineer to join our Energy team at Costain. In this role, you will act as Lead Design Engineer on one or more projects, delivering innovative engineering solutions for industry-leading clients. Our Energy portfolio spans every project phase, from concept studies and FEED through to EPCm delivery. You will collaborate with multi-discipline teams to ensure projects are completed to the highest standards, on time and within budget. Our work covers brownfield Oil and Gas facilities, pioneering Hydrogen production and storage, and extends into other sectors such as Nuclear, Defence, and Transport. This is a hybrid role, with 2–3 days per week in our Manchester office and the flexibility of dynamic working. Senior Engineers are welcome to apply, with responsibilities adjusted according to experience, supported by a development plan and gap analysis. Key Responsibilities As a client-facing Control and Instrumentation Engineer, your role may include: Providing technical input for projects and proposals, including preparation, checking, and approval of engineering deliverables. Leading and organising discipline teams, allocating tasks, and ensuring timely project delivery. Mentoring graduates and developing less experienced engineers. Producing high-quality C&I engineering deliverables that meet client expectations, schedules, and budgets. Ensuring compliance with relevant national and international standards, legislation, and client procedures. Preparing equipment and material requisitions for control systems, safety systems, analyser houses, field instrumentation, and other C&I equipment. Preparing installation scopes of work. Reviewing supplier quotations and completing technical bid assessments. Additional technical tasks may include: Full life-cycle development of control or protection systems (hardware and software). Software qualification for SMART devices and PLCs. Functional safety analysis and verification (both probabilistic and deterministic). Preparation of C&I equipment datasheets and specifications. Development and modification of C&I safety cases and cyber security documentation. About You To be successful in this role, you should ideally have: Chartered or Incorporated Engineer status or be close to achieving it. Strong knowledge of design and installation practices across multiple industries. At least 15 years of engineering experience in the Oil and Gas, Nuclear, or Water sectors. Extensive understanding of UK legislation and industry standards. Experience in the installation requirements for equipment in hazardous areas. A proactive approach to process improvement, talent development, and promoting the Costain brand.

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