Contract Mechanical Design Engineer – Avionics Integration Modification Project A specialist aerospace engineering organisation is seeking an experienced Contract Mechanical Design Engineer to support a live avionics integration and aircraft modification programme on a regional/narrow-body aircraft platform. This role will focus on the mechanical and structural integration of avionics equipment within a regulated aerospace design environment, supporting installation design, drawing production, systems integration, and aircraft modification activities in accordance with UK aviation approval frameworks. Key Responsibilities Design of structural and mechanical provisions for avionics equipment installations. Development of equipment mounting arrangements, trays, brackets, panels and supporting structure. Mechanical integration of avionics and electrical systems into existing aircraft platforms. Coordination with avionics/electrical engineers to ensure installation and interface requirements are achieved. Creation of 2D/3D CAD models, manufacturing drawings and installation drawings. Production of mechanical assemblies, installation packages and drawing trees. Support routing and integration activities for associated wiring and electrical equipment. Support manufacturing and production teams during build and installation phases. Assist with engineering substantiation activities including: Weight & Balance Human Factors Structural/Stress assessments Participate in design reviews including PDR/CDR activities. Manage engineering changes and update documentation accordingly. Support aircraft surveys and installation activities where required. Candidate Requirements Minimum 3 years’ experience within a UK CAA or EASA Part 21J aerospace design environment. Strong background in mechanical/structural design for aircraft modification programmes. Previous experience integrating avionics or electrical systems onto aircraft platforms is essential. Good understanding of Part 21J and/or Part 21G approval environments. Proficient with 2D and 3D CAD packages such as: Autodesk AutoCAD SolidWorks Fusion 360 or equivalent aerospace CAD tools Familiarity with OEM aircraft documentation, drawings and modification procedures. Previous design signatory/checking experience is advantageous. Experience on legacy regional or commercial aircraft programmes would be beneficial. Contract Details Immediate start preferred. 6 month contract. UK-based onsite role. Outside IR35 potential depending on engagement structure. About the Business The client is a specialist aerospace engineering and certification organisation delivering aircraft modification, avionics integration and mission system solutions across commercial and specialist aviation platforms. The business supports a wide range of design, certification and integration activities for both civil and special mission aircraft operators.