We are seeking an experienced Senior Pipeline Engineer (Mechanical) to support the delivery of pipeline engineering work on a 12-month freelance contract, operating Outside IR35. The role will focus on providing high-level mechanical pipeline expertise across design and delivery phases, working closely with multidisciplinary teams and key stakeholders. Key Responsibilities * Lead and deliver mechanical pipeline engineering activities across assigned projects * Produce, review and approve pipeline design deliverables including calculations, specifications and reports * Ensure designs comply with relevant codes and standards (e.g. PD 8010, ASME, API, DNV, BS EN) * Undertake wall thickness calculations, material selection and stress analysis * Provide technical input into route selection, constructability and installation methodologies * Participate in HAZID, HAZOP and design review workshops * Interface with civil, process, integrity and construction teams * Support contractor and vendor technical reviews * Provide technical guidance to junior engineers where required * Ensure engineering deliverables are produced to programme and quality expectations Skills & Experience * Strong background in mechanical pipeline engineering within oil & gas, energy, utilities or infrastructure sectors * Proven experience working in a contract / consultancy environment * Solid understanding of pipeline lifecycle engineering from concept through detailed design * Ability to work autonomously and manage competing priorities * Excellent communication and stakeholder management skills Qualifications * Degree in Mechanical Engineering or related discipline * Chartered Engineer status desirable but not essential * Strong working knowledge of UK and international pipeline standards