Principal Mechanical Engineer

About The Role Optimus Plus are now seeking an experienced Principal Mechanical Engineer to join our growing engineering consultancy, supporting major energy, oil and gas, and low-carbon projects across the UK and Europe. This role is available on an long-term, on-going contract (Ltd/umbrella) basis and can be based in our Aberdeen or Glasgow office on a flexible hybrid working model, where 2 days per week can be worked remotely. Role Summary: This is a key role, responsible for delivering high-quality mechanical engineering solutions throughout the project lifecycle, from concept and FEED studies through detailed design, execution, commissioning, and operational support. Working closely with clients, project managers, and multi-discipline engineering teams, you will ensure all deliverables meet relevant industry and clint standards, regulatory requirements, and client expectations. The successful candidate will possess extensive experience in the upstream, midstream, or downstream oil and gas sector, together with a strong understanding of process plant equipment, piping systems, package equipment, and safety-critical design principles. Chartered Engineer status (or working towards it) is highly desirable. Suitable candidates must have previous consultancy experience, excellent communication and stakeholder management skills, and the ability to lead technical teams while identifying opportunities to support business growth. This is an excellent opportunity to join a respected engineering organisation delivering innovative and sustainable solutions to the evolving energy industry. Key duties: Identify the scope of work requiredInput to project plansIdentify areas of concern during any project or studyProduce cost- effective engineering solutions that are fit for purpose, safe and add valueAbility to address operational and maintenance issues in the design and liaise with colleagues for the best solutionExercise technical authority and autonomy in all engineering activities About You Qualifications: Degree qualified in a relevant subjectChartered Engineer (CEng) status and membership of a recognised professional institution. Experience/ competence: Extensive experience in mechanical engineering design and consultancy within the process, oil and gas sector.Demonstratable experience in Brownfield Asset Development.Proven track record delivering concept, FEED and detailed design projects for offshore and onshore facilities.Strong knowledge of pressure equipment, rotating equipment, package systems and mechanical integrity management.Working knowledge of ASME, API, ISO, DNV, PED and relevant UK/EU legislation.Experienced in HAZOP, HAZID and design safety reviews.Ability to lead multidisciplinary engineering teams and act as Mechanical Technical Authority.Strong client-facing skills with experience leading technical workshops and presentations.Commercial awareness with experience supporting proposals, estimates and business development activities.Experience in energy transition projects including CCUS, hydrogen and offshore renewable developments is highly desirable. About Us We are all about practical delivery. Our expert engineering solutions are always tailored, pragmatic, credible and fit for purpose. That is the Optimus way. Optimus is an integrated, multi-discipline engineering design, project delivery and consultancy organisation. Founded in 1999, the business began as a consultancy with a headcount of just four. In the intervening years, Optimus has grown into a highly respected international engineering consultancy with almost 100 employees working for clients worldwide. We are proud to be an equal opportunity employer and value inclusion and diversity. We welcome applications from all persons regardless of race, religion, colour, national origin, gender, sexual orientation, age, marital status, veteran or disability status.