My client is looking to appoint an experienced Senior Process Engineer to support the delivery of a key site-based capital project in Essex. This is a 12-month fixed-term contract position, suited to a senior engineer with strong EPC experience, COMAH exposure, and a proven background in design review and contractor interface. The role will act as the first layer of technical assurance on process design deliverables from external design contractors, ensuring solutions are safe, compliant, operable, and fully aligned with site requirements. The role sits at the interface between process design, projects, contractors, and site operations, requiring regular site presence and hands-on engagement. The Role: Serve as the process engineering focal point for the project. Lead and review process design deliverables throughout FEED, Detailed Design, Construction, and Commissioning phases. Provide first-line review and approval of contractor process deliverables, including Process Flow Diagrams (PFDs), P&IDs, process design calculations, datasheets, vendor documentation, process control, and operating procedures. Plan and manage the transition from construction to commissioning and operations handover. Act as the interface between contractors and the site operations team to ensure all procedures and work instructions for operating the asset are well documented and fully embedded. Review and challenge all process control and safeguarding designs to ensure compliance and operational excellence. Required Experience: Degree-qualified engineer in Chemical, Process, or related Engineering discipline. Proven experience reviewing and assuring contractor designs in EPC/EPCM environments. Experienced in supporting commissioning and operational handover. Proven experience working on COMAH-regulated sites. Confident decision-maker with the ability to assess risk and challenge design solutions. Comfortable working in a live operational environment. Our role in supporting diversity and inclusion As an international workforce business, we are committed to sourcing personnel that reflects the diversity and values of our client base but also that of Orion Group. We welcome the wide range of experiences and viewpoints that potential workers bring to our business and our clients, including those based on nationality, gender, culture, educational and professional backgrounds, race, ethnicity, sexual orientation, gender identity and expression, disability, and age differences, job classification and religion. In our inclusive workplace, regardless of your employment status as staff or contract, everyone is assured the right of equitable, fair and respectful treatment