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.

Working Hours

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.

About The Role

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.

What you will do

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

Your Experience

To be considered for this role, you should have:

Essential

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 competencies to apply within 18 months

Why You’ll Love Being Part of the Team

At IN2, we’ve traded the stuffy corporate ladder for a flat hierarchy and a culture where your voice actually matters. We’re a diverse, collaborative team that believes the best ideas can come from anyone, anywhere.

Global Impact, Local Feel: You’ll get to work on game-changing projects across different countries, supported by our specialist BIM, Sustainability, and Building Physics teams.

Constant Growth: Through IN2 Talks, cross-office collaboration, and a culture of knowledge sharing, you’re always learning something new.

Your Best Self: We prioritise a genuine work-life balance with flexible hours and support for personal circumstances. We’re big on open communication and ensuring our workplace is a bias-free zone where you can truly be yourself.

What’s In It For You?

We’ve put together a package that looks after your wallet, your career, and your wellbeing.

The Essentials

Competitive Pay & Bonuses: A salary that reflects your worth, plus an annual bonus and pension contributions.

Annual Leave: 22 days of annual leave, scaling up to 27 days as you grow with us (plus all those bank holidays!).

Flexible Hours: Work-life balance isn't just a buzzword here—we offer a 37.5-hour working week with flexible hours (8am–6pm), to suit your lifestyle!

Career Progression

Personal Roadmap: You’ll have a dedicated Personal Development Plan and mentoring from our senior leaders.

The IN2 Academy: Access to our internal academy, CPD support, and expert assistance in advancing your career.

Health & Wellbeing

Mind & Body: Access to our Employee Assistance Program, annual health checks, and various fitness initiatives.

Commute Greener: Take advantage of our Cycle to Work scheme to keep active on your way to the office.

Social & Community

Legendary Events: From our famous Christmas party weekend to Employee Appreciation Day and regular staff social events.

Giving Back: Get involved with our team-led charity initiatives.

International Reach: Opportunities to work across IN2 offices in London, Dublin, Berlin, Belfast, Athlone, and Madrid.

Eligibility

Due to regulatory requirements, this role is open to candidates with permanent residency or unrestricted right to work in Ireland only. Applications requiring visa sponsorship cannot be considered.