Part 21J Cabin Interiors Design and Certification Engineer 60,000 - 80,000 base + benefitsLocation: Frimley, Farnborough Area - HybridAbout the Opportunity:We are hiring for a Cabin Interiors Design and Certification Engineer to support the development, integration and approval of commercial aircraft interior modification solutions across multiple platforms.This role offers the chance to work across the full design and certification lifecycle, collaborating with airlines, regulators and multi-disciplinary engineering teams on high-profile, safety-critical programmes.Key Responsibilities:Design Engineering - Support the design and integration of cabin interior and aircraft modification solutions - Produce CAD models, installation drawings and engineering documentation - Develop specifications and technical design data for interiors systems and equipment - Assist with test plans, validation and design verification activitiesCertification Engineering - Ensure designs comply with EASA/FAA regulations and Part 21J DOA processes - Prepare compliance documentation including reports, safety assessments and risk analyses - Support certification programmes for new products and modifications - Liaise with regulatory authorities and internal stakeholders to obtain approvalsTechnical Support - Provide engineering support to production, installation, testing and maintenance teams - Troubleshoot design and certification issues and implement effective solutions - Act as a technical point of