Junior Mechanical Design Engineer – Building Services Location: Hertfordshire Sector: Building Services – Pharma, Commercial, and Residential Projects Salary: Competitive Benefits Employment Type: Full-time, Permanent About the Practice: Join a forward-thinking building services consultancy that’s redefining the way mechanical systems are designed and delivered. With a strong portfolio of work across pharmaceutical, commercial, and high-end residential sectors, this Hertfordshire-based practice combines technical excellence with a progressive, people-first culture. They are renowned for their hands-on training, professional development, and investment in junior talent. Role Overview: We’re looking for an enthusiastic and motivated Junior Mechanical Design Engineer to join a collaborative and experienced design team. You’ll work closely with senior engineers and technical directors to design and deliver mechanical systems that meet the highest standards of sustainability, comfort, and compliance. This is a great opportunity for a recent graduate or someone with 6–18 months of industry experience looking to grow their career in building services. Key Responsibilities: * Support the design and specification of mechanical systems (HVAC, hot and cold water, ventilation, etc.) for a variety of building types. * Prepare design calculations, CAD drawings, and technical reports under supervision. * Assist with project documentation and coordination with other disciplines. * Attend internal and external design meetings. * Stay up to date with relevant building regulations and sustainability standards. * Participate actively in structured training and mentorship programmes. What We’re Looking For: * Degree or HND in Mechanical Engineering or Building Services Engineering. * Strong interest in mechanical design within the built environment. * Familiarity with design tools such as AutoCAD, Revit, or IES is a bonus. * Eagerness to learn and develop professionally. * Excellent communication and problem-solving skills. * Team player with a proactive and positive attitude. What’s on Offer: * A clear training and development pathway with mentoring from chartered engineers. * Exposure to complex and exciting projects from day one. * Friendly, collaborative office culture that supports growth and innovation. * Competitive salary, pension scheme, and flexible working options. * CPD support and assistance toward CIBSE or IMechE chartership