Senior Mechanical Engineer in design (HKLS)

Senior Mechanical Engineer in design (HKLS) 

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. 

Job Title 

Senior Mechanical Engineer in design (HKLS) 

Salary 

€55,000 – €75,000 per annum 

Location 

Berlin - Hybrid 

Working Hours  

We operate a 40 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 

The Senior Mechanical Engineer (HKLS) plays a critical role within the MEP design team, leading the mechanical services design of complex building projects across multiple sectors. The position exists to ensure high quality, compliant HKLS designs are delivered in line with HOAI phases, DIN/VDI/VdS standards, and client requirements.

This role provides technical leadership, supports project delivery from concept through site supervision, and helps build the foundation for future workloads by mentoring junior engineers and collaborating closely with clients and multidisciplinary teams.  

What you will do 

Lead and deliver HKLS mechanical designs across all project phases, ensuring technical quality, compliance, and timely delivery. 

Manage multiple projects from concept through construction and handover, including design coordination and site supervision. 

Develop, review, and approve mechanical designs, calculations, specifications, and drawings in line with HOAI phases and DIN/VDI/VdS standards. 

Design and coordinate heating, cooling, ventilation, plumbing, and fire suppression systems (where applicable) for new-build and refurbishment projects. 

Mentor and support junior engineers while coordinating workloads and priorities. 

Liaise with clients, architects, contractors, and internal MEP teams to deliver integrated design solutions. 

Maintain high standards of safety, quality, and regulatory compliance, identifying and mitigating technical risks. 

Report to the Line Manager and support the development of internal standards, workflows, and future project structures. 

Your Experience 

Essential 

Degree in Mechanical Engineering, Building Services Engineering, or a related discipline, with formal experience as an MEP / HKLS Design Engineer. 

Minimum 5 years’ experience in mechanical building services design, including at least 4 years within Germany or the wider DACH region. 

Proven capability delivering HKLS designs from concept through construction and site supervision. 

Strong technical expertise in HKLS systems and a solid working knowledge of HOAI phases and DIN/VDI/VdS regulations. 

Experience preparing and reviewing calculations, specifications, reports, and drawings. 

Professional German language skills (C1 minimum) and good working proficiency in English (B2 minimum). 

Strong analytical, organisational, and problem-solving skills with the ability to manage multiple priorities independently. 

Confident communicator with a collaborative approach and a strong commitment to quality and compliance. 

Desirable 

Chartered Engineer status (or equivalent), or working toward professional accreditation. 

Additional training in sustainable, low-carbon, fire suppression, or advanced plumbing systems. 

Experience delivering HKLS projects across residential, hospitality, logistics/warehouse, and office sectors, including refurbishments and international work. 

Proven ability to mentor junior engineers and lead mechanical design packages. 

Strong working knowledge of AutoCAD and/or Revit within multidisciplinary BIM environments. 

Capability to support the development of internal standards, workflows, and future project structures. 

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: 25 days of annual leave, scaling up to 30 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 40 hour working week with flexible hours (8am–6pm), to suit your lifestyle! 

Future Security: Complimentary pension scheme with employer-matched contributions up to 5%. 

Shared Success: Profit Share – benefit directly from our success. 

Rewarding Excellence: Performance Bonus to reward your achievements. 

Travel Made Easy: Public transport fully paid. 

 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. 

Wellness Support: €250 annual Health & Wellbeing allowance. 

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.