Senior and Principal Mechanical Design Engineer - Data Centres & Mission-Critical Projects A leading energy and transformation engineering company is seeking a number of skilled professionals to lead mechanical design projects across data centers and other mission-critical environments. This is a fantastic opportunity to take on a key role in high-profile projects while growing your leadership and technical expertise. The Role: Leading mechanical design from bid to commissioning Manage and mentor designers, reviewing and approving mechanical designs Oversee coordination between mechanical, electrical, and construction teams at all project stages Conduct design reviews, risk assessments, and ensure compliance with RIBA, BSRIA BG6, and ISO 19650 Maintain an audit trail for design approvals and provide technical reports Work with design & build contracts and engage with key stakeholders About You: Degree or equivalent experience in Mechanical/Building Services Engineering (BEng/MEng) Proven expertise in mechanical services design for data centers and critical environments Strong leadership skills, mentoring engineers and managing project risks Experience across the full design lifecycle, from pre-construction to commissioning Knowledge of sustainability & compliance (BREEAM, Part L), and mathematical modelling (CFD, FEA) If you have a strong background in mechanical services design, particularly in mission-critical environments, and the ability to manage and deliver projects in line with RIBA and BSRIA standards, please apply below for more information.