Our client, a leading organisation in the defence and security sector, is seeking a Principal Mechanical Engineer to support platform systems engineering activities in Coventry. This contract role will involve developing and delivering complex mechanical systems across the full engineering lifecycle, from design and integration through to commissioning and customer acceptance. Key Responsibilities: Develop mechanical design solutions to agreed time, cost and quality requirements in line with project and business milestones Develop and manage system, product and platform requirements, including associated acceptance criteria Interpret contractual and performance requirements across design, build, integration, installation and commissioning activities Produce technical documentation for design reviews, including diagrams, specifications, calculations, design evidence and justifications Maintain comprehensive design proving evidence within requirements management tools and ensure appropriate technical endorsement Ensure compliance with contractual, safety, environmental and engineering standards, processes and procedures Lead or contribute to design reviews and technical presentations for customers and stakeholders Provide technical support throughout integrated performance and acceptance activities, including equipment and system acceptance Job Requirements: Demonstrable experience delivering mechanical systems through the complete engineering lifecycle Comprehensive experience applying mechanical engineering expertise across design, integration, verification and acceptance activities In-depth knowledge of specifying mechanical equipment and components Experience with diesel generators and associated mechanical systems would be advantageous Strong understanding of requirements management, technical specifications and acceptance criteria Ability to produce and review engineering calculations, technical documentation and design evidence Confident communication skills, with the ability to present technical information to customers and stakeholders Ability to work in accordance with defence, safety, environmental and quality standards Contract Details: Six-month contract opportunity 37 hours per week Based in Coventry Hybrid working, with two to three days on site each week If you are an experienced Principal Mechanical Engineer with expertise in platform systems, mechanical equipment and full lifecycle engineering within a defence environment, apply now to support this important engineering programme