Your new companyA leading international building services consultancy is seeking an Intermediate Mechanical Project Engineer to join their high-performing London team. This is an opportunity to work on technically complex, high-profile projects across sectors including defence, commercial, infrastructure, and mission-critical environments.Your new roleYou will play a key role in the design and delivery of mechanical building services systems, working within multidisciplinary teams on some of the most challenging and prestigious projects in the UK and internationally.Projects are varied and confidential in nature but include:Large-scale secure government and defence facilitiesHighly serviced commercial developmentsComplex infrastructure and data-driven environmentsNet-zero and sustainability-led engineering schemesYou will be responsible for:Mechanical design (HVAC, public health, building systems) from concept through to completionProducing and reviewing technical drawings, specifications, and calculationsCollaborating with clients, contractors, and internal teamsSupporting project delivery, including site involvement and commissioning stagesContributing to sustainable and low-carbon design solutionsWhat you''ll need to succeedDegree-qualified in Mechanical Engineering or Building Services Engineering3-6 years'' experience within a building services consultancy environmentStrong technical design capability across HVAC systemsExperience working on complex or high-security proj