Senior Mechanical Building Services Design EngineerLocation: LondonEmployment Type: Full-Time, PermanentSalary: 60,000 - 65,000 per annumRole OverviewOur client is seeking an experienced and highly motivated Senior Mechanical Building Services Design Engineer to take a lead role within their growing Design and Build team. The role will suit a mechanically biased Building Services Design Engineer with strong technical capability, commercial awareness, and experience delivering mechanical design solutions within a Design and Build environment.You will lead the mechanical design process from feasibility and concept through to detailed design, installation, and commissioning support. The role will involve close collaboration with estimating, project management, construction teams, clients, consultants, and supply chain partners to ensure designs are compliant, coordinated, buildable, and aligned with project requirements.This is a London-based role and will initially be office-based, with flexibility for hybrid working after the first few months.Key ResponsibilitiesLead the mechanical design of building services systems including HVAC, public health, and coordination with specialist system suppliers.Manage the full design lifecycle from feasibility and concept through detailed design, installation, and commissioning support.Collaborate closely with internal teams, including estimating, project management, and construction, to develop coordinated and buildable solutions.Engage wit