Senior Mechanical Design Engineer Company: Martin Ralph Group (MRG) Location: Flexible / UK Wide with travel to Defence Estate sites as required Salary: 55k-65k Sector: Built Environment / Defence Infrastructure Senior Mechanical Design Engineer Role Overview MRG is seeking an experienced Senior Mechanical Design Engineer to lead and deliver mechanical building services designs across a diverse portfolio of projects within the built environment sector, with a strong emphasis on Defence Estate infrastructure. The successful candidate will provide technical leadership, support project delivery, and ensure high-quality engineering solutions are developed in accordance with client, regulatory, and security requirements. Senior Mechanical Design Engineer Key Responsibilities * Lead the design and coordination of mechanical building services systems including HVAC, heating, ventilation, chilled water, domestic water services, and specialist systems. * Produce and review detailed design calculations, specifications, reports, and technical drawings. * Manage and mentor junior engineers and support the development of engineering teams. * Coordinate with multidisciplinary project teams including electrical, structural, architectural, and client representatives. * Attend client meetings, site surveys, technical workshops, and design reviews across Defence Estate projects. * Ensure compliance with current regulations, British Standards, C...