Principal Mechanical Engineer

A leading international engineering consultancy is seeking a Principal Mechanical Engineer to join its expanding Dublin team. This is a senior leadership role focused on delivering technically complex projects, driving innovation in mechanical design, and mentoring high-performing engineering teams.

You will take ownership of mechanical design delivery across major projects, acting as a key client interface while ensuring best-in-class engineering standards.

• Lead mechanical design delivery from concept through to completion across multiple sectors
• Act as technical authority across HVAC, public health, and energy systems
• Manage and mentor multidisciplinary engineering teams
• Oversee design quality, compliance, and technical standards
• Engage directly with clients, stakeholders, and project partners
• Manage project budgets, programmes, and resource allocation
• Support business development, including bids and tenders
• Drive sustainable and energy-efficient design solutions

You will play a key role in delivering a range of high-profile developments, including:

• Large-scale data centre campus – cooling strategy, HVAC systems, and energy optimisation for mission-critical environments
• Major commercial office development – low-carbon, high-performance mechanical design aligned with sustainability targets
• Pharmaceutical / life sciences facility – complex HVAC and cleanroom design with strict regulatory compliance

• Degree in Mechanical Engineering or related discipline
• 8–12+ years’ experience within building services / data centre / life sciences / commercial sectors
• Proven experience operating at Senior or Principal Engineer level
• Strong background in HVAC, heating/cooling systems, and public health design
• Experience delivering projects across the full design lifecycle
• Chartership (or working towards) highly desirable
• Experience with relevant design and modelling tools (e.g., IES, Hevacomp, Revit/BIM)

• Strong leadership and xcfaprz people management skills
• Excellent client-facing and communication ability
• Commercial awareness and delivery focus
• Ability to manage multiple large-scale projects simultaneously
• High level of technical expertise and attention to detail
• Strong problem-solving and decision-making capability

• Performance-related bonus
• Pension contribution
• Hybrid and flexible working
• Generous annual leave with service increases
• Professional development and chartership support
• Opportunity to work on landmark, high-impact projects

If you are a building services design engineer please send your CV to or call