Senior Mechanical Engineer / Basildon / £50 per hour outside IR35 Our client, a leading Aerospace and Defence organisation are seeking a Mechanical Engineer. As a Mechanical Engineer, you will play a crucial role in the development and design process of cutting-edge Missile Seeker technology. This position requires hands-on experience in mechanical design and development, utilising 3D CAD software, particularly PTC Creo. The successful candidate will work closely with IPT to ensure that key milestones and deliverables are achieved on time, within budget, and to the highest quality standards. Responsibilities Perform hands-on mechanical design and development using 3D CAD software, specifically PTC Creo. Generate detailed assembly and component drawings in accordance with BS8888 standards. Create and maintain Bill of Materials (BOM) using a PLM system, such as Teamcenter Unified. Design electronics enclosures to meet environmental and EMC requirements. Contribute to the design of opto-mechanical sub-assemblies. Provide expertise in cable harness design, including connector selection, screening, and strain relief methods. Produce numerical calculations and tolerance studies to support design solutions. Collaborate effectively with the Integrated Project Team (IPT) and communicate project progress and challenges. Work autonomously to develop compliant solutions and adapt to evolving project requirements. Apply knowledge of DfX principles, including Manufacturing, Assembly, Test, Integration, and Sustainability. Requirements Bachelor's degree in Mechanical Engineering or related field. Proven experience in the defense and/or aerospace industry is highly desirable. Proficiency in PTC Creo and experience in using Teamcenter Unified. Strong understanding of BS8888 standards and GD&T principles. Excellent communication skills and the ability to work effectively within a team. Eligibility to hold BPSS/SC Security status is essential. Experience with ITAR regulations and classified information is desirable but not essential.This is a 6 month temporary contract with the potential to extend This is a hybrid role, Monday to Friday, 37 hours per week. __PRESENT__PRESENT Kelly Services are acting as an Employment Business in relation to this role. Should you choose to apply, your information will be processed in accordance with Kelly's . For information regarding data protection at Kelly, please visit the Kelly website and have a look into the Privacy Statement. As an Equal Opportunities employer we welcome applications from all suitably qualified persons regardless of their race, sex, disability, religion/belief, sexual orientation or age