Senior Mechanical Engineer- Belfast

Senior Mechanical Engineer

Lead Projects, Influence Outcomes, Set the Standard.

This is where you move beyond delivery into real influence. You'll lead projects, shape decisions, and play a key role in developing both teams and client relationships.

The Role

This role is focused on leading mechanical design across major projects, managing delivery from concept through completion, and helping shape the technical direction of work. You'll work closely with clients, consultants, and internal teams to deliver high-quality outcomes while supporting the growth of junior engineers.

What You'll Do

• Lead mechanical design across major projects
• Manage delivery including timelines, quality, and technical output
• Oversee calculations, specifications, and technical reviews
• Act as a key client contact and trusted advisor
• Coordinate multidisciplinary teams and external consultants
• Mentor and develop junior engineers
• Drive sustainability and innovation within projects

What You'll Bring

• Degree in Mechanical or Building Services Engineering
• 6+ years' consultancy experience
• Strong technical expertise across mechanical systems
• Proven experience leading projects and client relationships
• Chartered or working towards Chartership desirable
• Strong leadership and communication skills

What You'll Get 

This isn't built around perks. It's built around how high-performing engineers actually want to work. Real ownership, real progression,

and a culture that trusts you to deliver.

The Essentials

• Competitive salary, bonus and pension that reflect your impact
• 22 to 27 days annual leave, plus bank holidays
• Flexible working across a 37.5 hour week: early start or later start? you decide

Career Progression

• A clear path forward, with responsibility increasing as you prove it
• Direct exposure to senior leaders, not layers of hierarchy
• IN2 Academy, CPD support and chartership guidance
• Fully paid professional fees

Health and Wellbeing

• Employee Assistance Programme and annual health checks
• Wellbeing and fitness initiatives that support you long term
• Cycle to Work scheme to make the everyday easier

Social and Community

• Genuinely strong team culture, built through regular events and shared wins
• Employee-led charity initiatives with real involvement
• Offices in Dublin, London, Berlin, Belfast, Athlone and Madrid

Why IN2?

Across every role, electrical, mechanical, or BIM, the IN2 difference is the same: you're expected to think, lead, and shape outcomes, not just execute instructions. Here's what sets us apart.

Ownership from Day One

Whether you're an Engineer or a Senior, you'll have real accountability and decision-making authority. No waiting for permission. No layers of sign-off slowing you down.

Progression Based on Ability

Faster progression based on what you deliver, not how long you've been in the seat. A clear pathway from Engineer to Senior, Associate, and beyond.

Innovation Time

Dedicated time to develop new ideas, explore emerging technologies, and contribute to sustainability strategies: built into how we work, not bolted on.

High-Performance, Low-Ego Culture

A team that challenges each other, supports each other, and wins together. No hierarchy for hierarchy's sake. Just talented people doing exceptional work.

Complex, High-Profile Projects

Exposure to design-led, high-impact developments that push the boundaries of what building services engineering can achieve.

Global Reach

Work across offices in Dublin, London, Berlin, Belfast, Athlone, and Madrid- a genuinely international practice with a collaborative, connected culture.

Ready to own the outcome? Join a team that expects more and gives more in return.