At Tetra Tech , you''ll play a key role in leading the delivery of mechanical building services projects across a broad range of sectors, helping to strengthen and develop a busy and successful team in Manchester. Purpose and Scope of the Role As a Professional Principal Mechanical Building Services Engineer, you will lead and deliver multiple medium-complexity projects independently, or packages of higher-complexity projects under the direction of senior colleagues. You will be responsible for all aspects of mechanical engineering consultancy delivery, including calculations, drawings, specifications, reports, site surveys, construction-stage duties, and client liaison. You will also support business development, manage client relationships, contribute to securing new work, and may take line management responsibility for less experienced staff. Your Impact in this position You will have a direct influence on project success, client satisfaction, and team performance. Your leadership will help deliver high-quality mechanical design solutions, develop strong client relationships, support workload management, and contribute to fee generation, bid activity, and the growth of the wider team. Core Capabilities Technical Mechanical Design Leadership Strong ability to lead mechanical design from concept through to completion, with sound knowledge of calculations, drawings, specifications, and technical reporting. Project and Team Delivery Experience managing multiple ..... full job details .....