Mechanical Design Engineer

Join a growing engineering team delivering complex, high-impact building services projects across the UK and beyond. If you’re driven by technical excellence and want to shape innovative environments, this is your opportunity to make a tangible difference. Purpose & Scope of the Role This role focuses on the design and delivery of mechanical building services solutions across a diverse portfolio of complex projects, including refurbishment and new-build developments. You will lead projects from concept through to commissioning, ensuring high-quality, coordinated designs that meet client and regulatory requirements. Working both independently and as part of multidisciplinary teams, you will contribute across sectors such as commercial, healthcare, education, industrial and leisure, while also supporting project management, contractual processes and change control. Your Impact in this Position You will play a key role in delivering technically robust, efficient and innovative engineering solutions. From engaging with clients and contractors to mentoring junior engineers, your work will directly influence project success and team development. Your ability to manage multiple priorities, maintain precision in design calculations, and collaborate across disciplines will ensure consistent delivery of high-quality outcomes. Technical Design Expertise : Deliver accurate, compliant mechanical designs across all project stages. Apply industry standards, modelling tools and engineering judgement Project & Commercial Awareness : Manage projects end-to-end, including scope, risk and change control. Understand contractual frameworks and client expectations Collaboration & Communication : Lead and contribute effectively within multidisciplinary teams. Confidently engage with clients, contractors and stakeholders Leadership & Development : Mentor graduates and apprentices, supporting their technical growth. Promote best practice and continuous improvement within the team Adaptability & Sector Experience : Work across varied sectors and complex project environments. Demonstrate flexibility to travel and support project delivery needs Skills, Qualifications & Experience Degree-qualified in Mechanical or Building Services Engineering (or equivalent), with relevant industry experience. Membership of a professional body such as CIBSE, IMechE or IET is expected, with Chartered status or progress towards it desirable. Proficiency in tools such as AutoCAD, Revit, IES or similar is advantageous, alongside knowledge of BREEAM, thermal modelling and engineering calculation software. Experience in sectors such as healthcare, education or defence is beneficial. This role is based in Belfast, with a hybrid working model typically involving 2–3 days in the office and flexibility for remote working. Occasional travel across the UK and Ireland is required, with opportunities for short international assignments. Flexible working arrangements are supported to promote a healthy work-life balance. About Tetra Tech Tetra Tech is a leading provider of consulting and engineering services working across the full project lifecycle worldwide. We have a wide range of expertise across our teams, providing a global support network with a personalised approach to client relationships to better understand where we can add value. We provide a collaborative environment that supports individual performance, innovation, and creativity. We support public and private sector clients on local, national, and international projects to deliver sustainable and resilient solutions. Our operations in the UK, Ireland, and the Netherlands include more than 6,000 employees who are leading with Science to solve our clients’ most complex problems. In alignment with the Equality Act 2010, we will make reasonable adjustments to support candidates and employees requiring additional arrangements. This could include adaptations to work schedules, training approaches, or the physical workspace. Please inform us if you need any accommodations during the recruitment process or in your day-to-day role. #J-18808-Ljbffr Tetra Tech