Product Thermal Engineer.

We are currently looking for a Product Thermal Engineer to join our dynamic team in Zagreb, Croatia!

As a Product Thermal Engineer, you will take ownership of the design and development of HVAC designs for mission-critical datacenter facilities, modular infrastructure projects and AI factories worldwide.

The role combines engineering collaboration with Pre-Sales, Product Management, Marketing, and cross-functional engineering teams to develop general designs and project specific solutions globally.

You will develop thermal and HVAC solutions for modular data centers and AI factories, creating conceptual and detailed mechanical designs, including heat load calculations, cooling and ventilation designs, CFD analyses, drawings, specifications, and material submittals. You will support projects throughout the full lifecycle, from concept development and design coordination to construction support and commissioning, while collaborating with multidisciplinary international teams and ensuring compliance with project requirements, standards, and quality objectives.

We're looking for engineers who enjoy solving complex, critical engineering challenges, continuously improving technology solutions, and working with modern automation platforms, virtualization technologies, industrial protocols, and AI-assisted engineering tools.

What kind of work will you be doing?

• Develop thermal and HVAC concepts, standards, and detailed designs for modular data centers and AI factories.
• Create HVAC system layouts, cooling and ventilation calculations, CFD analyses, functional diagrams, specifications, and technical documentation using industry-standard engineering tools.
• Support product and project development from concept design through detailed engineering, construction support, and commissioning.
• Provide technical support to Pre-Sales, Offering, Marketing, and engineering teams in developing thermal and HVAC solutions.
• Prepare HVAC documentation, material submittals, Bills of Materials (BOMs), equipment schedules, and project deliverables.
• Ensure designs comply with applicable codes, standards, client requirements, and engineering best practices.
• Participate in project kick-off meetings, design reviews, coordination meetings, and site activities.
• Collaborate closely with multidisciplinary teams, including engineering, procurement, manufacturing, sales, service, and suppliers.
• Review and approve HVAC documentation, equipment selections, and supplier proposals.
• Coordinate with contractors, manufacturers, and installation teams to support project execution.
• Provide technical guidance during manufacturing, installation, testing, commissioning, and start-up activities.
• Support quality inspections, design verification, and resolution of technical issues throughout the project lifecycle.
• Prepare and maintain project records, as-built documentation, and operation manuals.
• Contribute to continuous improvement of thermal design standards, cooling solutions, and product offerings.
• Stay current with emerging cooling technologies, HVAC innovations, and industry trends to support the development of next-generation AI factory and data center solutions.

Qualifications

• Master’s degree in Mechanical Engineering, preferably with a focus on Thermodynamics, HVAC, or Thermal Engineering.
• 2+ years of experience in thermal engineering, HVAC system design, or related mechanical engineering disciplines.
• Experience working in multidisciplinary teams and contributing to complex engineering projects.
• Fluent English communication skills, both written and spoken (minimum B2 level).
• Proficiency in AutoCAD and Microsoft Office; experience with Revit/BIM tools is an advantage.
• Experience with CFD simulation and thermal analysis tools, such as Ansys, DC Reality, or similar platforms, is considered a plus.
• Understanding of HVAC systems, heat transfer, cooling technologies, ventilation systems, and thermal design principles.
• Strong analytical and problem-solving skills, with the ability to evaluate and optimize thermal solutions.
• Excellent attention to detail and commitment to engineering quality and accuracy.
• Ability to work independently while collaborating effectively with cross-functional teams.
• Strong organizational, communication, and time-management skills.

Travel Requirement

• Occasional site visits, coordination meetings and meeting with customers worldwide

Who are we?

At Vertiv, we’re on a mission to empower the people that will power the future. From a simple swipe to life-changing medicines, from push notifications to generative AI. We design, manufacture, and service the products and solutions that keep the world connected. With $6.9 billion in sales, a strong customer base and global reach spanning nearly 70 countries, we are uniquely positioned to deliver greater value to our customers and create new opportunities for our people.

Why join us?

You'll work on some of the world's most advanced data center and critical infrastructure projects, designing and developing electrical power systems that support mission-critical operations. This role combines electrical engineering, power distribution design, technical analysis, and multidisciplinary collaboration, offering excellent opportunities for professional growth and technical leadership.

What Do we offer?

• UNIQA supplementary health insurance for added security
• Special occasion bonuses (Easter, Christmas, performance-based rewards, and child-related bonuses)
• Free annual health check-up to support your well-being (Croatia Osiguranje)
• Opportunity to sign up for a MultiSport card for an active lifestyle
• Fresh fruit delivered every Monday for a healthy start to the week
• Referral bonuses as a thank-you for helping us grow our team
• Financial support for new parents with a non-taxable baby bonus
• Assistance in difficult times with a non-taxable allowance for the loss of an immediate family member
• Professional development through mentorship and training
• International teams and dynamic environment
• Contribution to projects of high technical complexity with modern technical challenges
• Full creative and professional freedom
• Flexible working hours
• Positive, casual, friendly, team-based working atmosphere
• Focus on competence development
• Access to internal training and external development opportunities
• Coverage of public transportation costs

If YOU are the person we are looking for, feel free to apply and let's start drafting your future career into a healthy and growing environment!

The successful candidate will embrace Vertiv’s Core Principals & Behaviors to help execute our Strategic Priorities.

OUR CORE PRINCIPALS

Safety. Integrity. Respect. Teamwork. Diversity & Inclusion.

OUR STRATEGIC PRIORITIES

• Customer Focus
• Operational Excellence
• High-Performance Culture
• Innovation
• Financial Strength

OUR BEHAVIORS

• Own It
• Act With Urgency
• Foster a Customer-First Mindset
• Think Big and Execute
• Lead by Example
• Drive Continuous Improvement
• Learn and Seek Out Development

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