Principal Mechanical Design Engineer - Travel Paid + Bonus A leading MEP contractor is seeking an experienced and commercially astute Principal Mechanical Engineer to join their team in London. This is a fantastic opportunity to take a senior role in the design and delivery of high-profile commercial and data centre projects. The Role As a Principal Mechanical Design Engineer, you'll take ownership in delivering the mechanical design and coordination process on complex projects. You'll lead project teams, engage with clients and consultants, and ensure technical excellence while keeping a sharp eye on commercial performance. Key Responsibilities: * Lead mechanical design and coordination on large-scale commercial and data centre projects. * Provide technical leadership and mentorship to junior and intermediate engineers. * Collaborate with consultants, architects, and BIM teams to deliver high-quality, coordinated designs. * Conduct site inspections and attend client/project meetings. * Ensure full compliance with UK regulations, CIBSE standards, and industry best practices. * Maintain a strong commercial focus-monitoring costs, managing budgets, and identifying value engineering opportunities. * Champion innovation, sustainability, and continuous improvement in engineering delivery. Requirements: * Degree in Mechanical Engineering or Building Services Engineering (or equivalent). * Exten...