Principal Mechanical Engineer

Principal Mechanical Engineer — Mott MacDonald We are looking for a Principal Mechanical Engineer to join our growing Nuclear, Defence and Civil division. This role offers an exciting opportunity to work on a diverse portfolio of projects, including nuclear decommissioning, defence, and nuclear new build. You will collaborate with clients both locally and nationally while contributing to some of the most impactful energy and infrastructure projects in the industry. Key Responsibilities and Duties Lead mechanical engineering aspects of multi‑discipline design projects, from feasibility to detailed design stages Work on a diverse range of projects, including nuclear decommissioning, defence, and energy infrastructure Liaise with clients to develop and deliver innovative solutions tailored to their needs Produce and oversee the creation of high‑quality design and technical documentation Provide quality assurance through surveillance, review, and checking of team outputs Collaborate with multi‑disciplinary teams to deliver fit‑for‑purpose engineering solutions Visit client sites as required and promote further opportunities to enhance client relationships Ensure safety is an integral part of mechanical engineering design and project delivery Present and defend solutions to complex problems in client‑facing environments Candidate Specification – Essential Chartered status with the IMechE or other relevant professional body (or equivalent experience with progress toward chartered status) Demonstrable experience in mechanical engineering design within a highly regulated industry, preferably nuclear Broad knowledge of industry standards, legislation, and engineering principles Strong commercial awareness, with experience in FEED (Front‑End Engineering Design) projects Excellent communication skills and the ability to engage effectively with clients and stakeholders Capable of managing and prioritising multiple projects in a dynamic environment Client‑facing experience, with the ability to maintain and build strong client relationships Experience of leading, managing and working with multi‑disciplinary teams Proactive in seeking input from other engineers, specialists, and team members to enhance project outcomes Committed to continuous professional development and staying abreast of industry advancements Please note that offers for this role are conditional upon obtaining the appropriate level of Security Clearance. Benefits Health and wellbeing Private medical insurance for all UK colleagues. Health cash plan to support you with everyday health costs and treatments. Access to Peppy, providing free support from menopause experts for all UK colleagues. Comprehensive wellbeing programme, including access for you and your family. Flex your salary to opt into a wide range of health benefits, many of which can be extended to your family. Financial wellbeing We match employee pension contributions between 4.5% and 7%. Life assurance equal up to 4x your basic salary, with an option to increase the level of cover to 6x your salary. Income protection scheme providing a financial benefit and support for long‑term illness or injury. Flexible benefits, including increased life assurance cover, critical illness insurance, payroll saving and will writing. Annual bonus schemes linked to the company's financial success. Leave and holidays Minimum 33‑35 days holiday each year, inclusive of public holidays. Entitlement increases to a minimum of 35 days after 5 years of service. Enhanced family leave policies: 26 weeks paid maternity and adoption leave; two weeks paid paternity/partner leave; up to five additional days leave for significant caring responsibilities, two of which are paid. Learning and development Annual professional institution subscription. Opportunities to enhance both technical and soft skills through mentoring, formal training, and self‑development options. Networks and social outcomes Access to advanced employee networks supporting diversity and inclusion. Participation in social outcome projects within local communities. Location(s) Glasgow, GB Bristol, GB Altrincham, GB Recruitment details Contract Type: Permanent Work Pattern: Full Time Market: Energy Discipline: Mechanical Job Ref: 10824 Recruiter Contact: Erinda Hazizi #J-18808-Ljbffr