Senior Mechanical Design Engineer - Building Services Location: Essex (Hybrid options available) Salary: Up to 90,000- 95,000 + Benefits (DOE)A leading Building Services Engineering Contractor based in Essex is seeking a highly skilled Senior Mechanical Design Engineer to join their growing design team. With a strong pipeline of projects across the commercial, education, and healthcare sectors, this is an excellent opportunity for a technically strong, client-focused engineer looking to progress within a forward-thinking business.The RoleLead the mechanical design process across a variety of building services projects.Produce detailed mechanical building services designs using Hevacomp and other industry-standard software.Collaborate with clients, contractors, and project teams to deliver efficient, compliant, and sustainable design solutions.Review designs, calculations, and technical submissions to ensure accuracy and best practice.Mentor junior engineers and contribute to team development.Work across full project lifecycle, from concept and feasibility through to handover.About YouDegree qualified in Mechanical Engineering or Building Services (or equivalent experience).Significant experience in mechanical building services design within the UK construction industry.Proficiency in Hevacomp and a good understanding of other relevant design software (e.g. IES, AutoCAD, Revit).Strong technical knowledge across commercial, education, and healthcare projects.Excellent communica