Mechanical Engineer - Flexible Location ( Travel Required) This is an exciting opportunity to join a global leader in fuel storage and distribution that's committed to driving a sustainable, green energy future. You'll join a people-focused business that values inclusion, development, and innovation. Role Overview: We're seeking a Mechanical Engineer with strong experience in piping, tanks, valves, and rotating equipment, ideally within COMAH-regulated environments. You'll act as the technical authority for mechanical systems, ensuring design integrity, regulatory compliance, and equipment optimisation across terminals and pipeline infrastructure. This is a flexible role with regular travel across North West Europe. Key Responsibilities: Lead on mechanical scope (valves, piping, pumps, rotating machinery). Ensure engineering design complies with API, EN, EEMUA, ASME standards. Manage spec/design/maintenance of tanks, vessels, pumps, jetty systems, and boilers. Participate in HAZOPs, HAZIDs, and FMEAs. Apply and manage MOC processes across sites. Conduct inspections, troubleshooting, and commissioning of equipment. Support asset integrity across ageing infrastructure. Provide technical assurance for safety-critical tasks in COMAH sites. Participate in the Operational Duty Manager rota.Key Skills & Experience: Mechanical Engineering degree or extensive project experience. Strong background in tank, piping, and valve specification and design. Certified in COMAH-regulated, high-hazard environments. Knowledge of DSEAR (ATEX), PED, PUWER, Machinery Directive, CDM. Must be CEng Excellent report writing, communication, and stakeholder management. Full UK driving licence and flexibility to travel.This role is ideal for someone with technical depth, a proactive mindset, and a passion for engineering excellence in a safety-critical, future-focused environment. ACS are recruiting for a Mechanical Engineer. If you feel that you have the skills and experience required in this advertisement to be a Mechanical Engineer submit your CV including an outline of your experience as a Mechanical Engineer. It is always a good idea to include a covering letter outlining your experience as a Mechanical Engineer with your application as this will enhance your chances of selection and improve your prospects of landing the Mechanical Engineer role you desire