Principal Mechanical Engineer - Nuclear and Green Energy Projects Location: UK-wide (Hybrid Working Available) Hours: 37-hour working week Clearance Required: British Nationals only (BPSS minimum) Are you a highly skilled Principal Mechanical Engineer with a background in regulated industries? Are you ready to make a real impact on innovative green energy and nuclear defence projects? Our client is a leading consultancy in the Nuclear and Defence sector, delivering high-profile projects across the UK. Known for their commitment to staff development, cutting-edge work, and long-term career opportunities, they offer a dynamic and forward-thinking environment for ambitious engineers. Why Join This Team? Be part of landmark government projects with a strong mechanical engineering focus Continuous professional development with support for further qualifications Flexible hybrid working and a comprehensive benefits package Join a collaborative, high-performing team that values innovation Key Responsibilities: Lead and uphold engineering standards and procedures across all technical activities Collaborate with clients to understand and deliver on mechanical requirements Produce and review engineering calculations, drawings (2D/3D), and technical documentation Mentor and develop technical capabilities within the team About You: HND/HNC or Degree in Mechanical Engineering (or related discipline) Chartership or working towards it Strong track record of delivering complex, reg