Senior Mechanical Engineer

Job Description About IN2

Formed in 2002, IN2 is a progressive engineering consultancy operating across Ireland, the UK, and Europe, dedicated to creating better spaces for people. With over 100 experts across six locations, our team of engineers, technicians, and consultants collaborate closely with clients and partners to deliver innovative, sustainable, and energy-efficient building solutions across a wide range of sectors—from concept and design through to handover and beyond.

For over 20 years, we have maintained a people-centric culture that encourages growth, innovation, and adaptability. Our award-winning MEP projects, combined with recognition as a ‘Great Place to Work’, reflect our commitment to quality, sustainability, and a supportive, inclusive work environment where individuals can thrive.

At IN2, joining our team means being part of a collaborative, high-performing, and forward-thinking organisation, where your contribution makes a real impact—and where career opportunities grow alongside our business.

We operate a 37.5-hour working week designed to support work-life balance. We offer flexible start and finish times between 8am and 6pm, provided that core hours of 10am to 4pm are covered for team collaboration and meetings.

As a Senior Mechanical Design Engineer, you will bring strong technical expertise in MEP installations, design engineering, mentoring, project management, site inspections, and client relations. You’ll play a key role in delivering high-quality mechanical design solutions across diverse sectors including commercial, healthcare, industrial, educational, and residential projects.

Belfast offers the opportunity to work on impactful projects within a growing and dynamic city, while maintaining a strong work-life balance. You will be trusted, supported, and encouraged to shape how things are done locally, with full backing from the wider IN2 team. This role suits someone looking for long-term stability, progression, and balance.

As a Senior Mechanical Engineer at our Belfast office, you will:

• Lead mechanical design on projects from concept to delivery
• Collaborate closely with clients and multidisciplinary teams
• Ensure high-quality engineering solutions are developed and implemented
• Support management in client relationships
• Manage project costs and prepare client cost reports related to mechanical installations
• Implement successful mechanical design solutions and develop engineering strategies aligned with client briefs
• Work alongside Project Directors to establish project requirements and deliverables
• Attend site meetings, carry out inspections, and review contractors’ technical submittals
• Prepare detailed site reports, project status updates, and verify installations against agreed designs
• Provide mentorship to junior engineers and ensure knowledge dissemination
• Collaborate with other engineers and technicians for fully coordinated designs
• Develop BCAR Inspection plans and monitor installation quality and project progress
• Represent the company at site and technical meetings

To be considered for this role, you should have:

• Minimum of 5 years’ consultancy-based design experience on commercial MEP projects
• Level 8 Degree in Building Services Engineering or Electrical Engineering (recognized for Chartership)
• Extensive knowledge of mechanical engineering standards, building regulations, and HVAC, water services, and drainage design
• Proficiency in mechanical design software (Hevacomp, AutoCAD, Revit, Navisworks)
• Experience designing commercial mechanical projects and working within design teams
• Strong report writing skills and proficiency in Microsoft applications
• Chartered Engineer status or ability to demonstrate…