Our client is a multi-disciplinary consultancy, offering a wide variety of engineering and sustainability services, together with complementary specialisms, from locations across the UK, Europe, Asia, Australia, the Middle East and North Africa. With more than 1,200 experts across 29 global locations, all demonstrating a passion for designing innovative, sustainable engineering solutions that have a positive impact on people and the planet. They are now looking for a Senior Mechanical Engineer to join their Critical Systems team, leading design and delivery of high-quality mechanical systems in an efficient and sustainable way on technically challenging projects across data centres, commercial buildings, and other complex infrastructure environments. What Youll Do Manage projects and coordinate engineering activities to meet deadlines and budgets. Produce and review designs, technical specifications, calculations, and reports. Work closely with multidisciplinary teams and external partners to achieve integrated design solutions. Attend client and site meetings, providing technical insight and proactive communication. Support, mentor, and develop junior engineers and technicians. Promote best practice in health, safety, quality, and environmental performance. About You Technically capable and collaborative engineer with a passion for delivering sustainable, forward-thinking mechanical design. A degree in Mechanical or Building Services Engineering (Chartered or working towards). Strong experience in mechanical building services design consultancy. Proven ability to manage projects and guide junior team members. A proactive, solutions-driven mindset with great communication skills. An interest in high-performance buildings and critical environments (data centre experience a plus, but not essentialtraining provided). Why Join Youll be part of a business that values: Creativity thinking differently and designing better solutions. Collaboration sharing ideas and building lasting relationships. Excellence striving to exceed expectations on every project. Integrity being honest, reliable, and kind in everything we do. Youll also enjoy: Flexible and hybrid working options. Structured development and mentoring. Opportunities for chartership and continued learning. A genuinely supportive global workplace culture.