Have you led mechanical design packages from concept through to installation and commissioning on complex engineering projects? Are you comfortable taking technical ownership, guiding other engineers and engaging directly with contractors and clients? Looking for an outside IR35 contract where your expertise genuinely influences project outcomes rather than just filling a seat? The Opportunity An outside IR35 contract opportunity has arisen for a Senior Mechanical Engineer to support a major project portfolio based in the Liverpool area. This role offers technically challenging work, genuine autonomy, and the chance to contribute to multidisciplinary engineering delivery on industrial-scale assets. We would also welcome applications from these industries: Energy, process engineering, nuclear, petrochemical, heavy manufacturing This role would suit candidates working in these roles: Senior Mechanical Engineer, Lead Mechanical Engineer, Mechanical Design Engineer, Principal Mechanical Engineer, Mechanical Project Engineer, Mechanical Package Engineer, Rotating Equipment Engineer, Mechanical Consultant Your duties and responsibilities will be Taking full technical ownership of mechanical engineering deliverables, ensuring outputs meet agreed standards, legislation, and quality expectations Providing day‑to‑day technical leadership and guidance to less experienced mechanical engineers within the project...