EcoDataCenter is looking for a driven Lead Engineer – Mechanical who wants to be part of a unique growth journey and help ensure a sustainable infrastructure for society's digitalization.

EcoDataCenter has been named the world's most sustainable data center. With innovative design, circular energy solutions and world-leading technology, we are building the data center of the future – where digitalization and sustainability go hand in hand.

We are a rapidly growing company with the ambition to become the Nordic region's leading player in sustainable and secure data center solutions. We work closely with local players in Dalarna to create regional development, while our market and impact are global. We are backed by wealthy owners who want to drive change in the industry.

About the position – Lead Engineer - Mechanical

As Lead Engineer – Mechanical, you are the technical lead for the cooling and mechanical architecture of our data centers. Your main focus is how all the mechanical systems fit together – from heat rejection and plant rooms through distribution, to room cooling and interfaces to the IT load – not just deep expertise in one specific product.

You work closely with cooling and HVAC OEMs, design partners and contractors, answering technical questions, challenging concepts where needed and making sure that the mechanical solution is efficient, reliable and buildable.

You support Project Managers, Site Managers and the Commissioning Manager with clear mechanical decisions and are a key point of contact for the customer’s mechanical and operations teams.

Typical systems in your scope:

• Chilled water or other liquid cooling plant (chillers or equivalent, pumps, primary/secondary circuits)
• Heat rejection systems (dry coolers, condensers or similar)
• Room cooling (CRAC/CRAH, in-row or rear-door cooling, air distribution)
• Process water systems, expansion vessels, filtration and water treatment
• Mechanical plant rooms, headers, manifolds and valve groups
• Interfaces to BMS/PME and control systems for mechanical plant

Areas of responsibility

Mechanical architecture and design coordination

• Own and maintain the overall mechanical/cooling architecture for assigned projects, including P&IDs and main plant layouts.
• Review and comment on OEM and consultant designs with a focus on hydraulics, redundancy, control philosophy and ease of operation.
• Ensure that mechanical design choices support required availability and energy-efficiency targets.

OEM and supplier interaction

• Act as the main day-to-day technical contact for cooling/HVAC OEMs and key mechanical suppliers.
• Review OEM proposals, equipment selections, control concepts and integration documents.
• Coordinate technical questions (RFIs) between OEMs, designers, contractors and the EcoDataCenter project team.

Support to projects and site

• Support Project Managers and Site Managers with mechanical input on space, routing, constructability and phasing.
• Participate in design, constructability and value engineering reviews, with a focus on clean, workable mechanical solutions.
• Visit site regularly to walk plant rooms and data halls, verify that installations follow design intent and support resolution of clashes or issues.

Support to commissioning and operations

• Support the Commissioning Manager and commissioning engineers in defining mechanical test scope and interpreting results.
• Clarify design intent for system behaviour during different operating modes and failure scenarios.
• Provide technical handover briefings to operations teams regarding cooling architecture, limitations and operating principles.

Documentation and standards

• Ensure that key mechanical documents (P&IDs, plant room layouts, schedules, control philosophies) are up to date and consistent.
• Contribute to standardising mechanical concepts and templates across projects, based on experience and lessons learned.
• Keep an overview of relevant standards and best practices for data center cooling and liquid-cooled solutions.

Your profile

You are an experienced mechanical or HVAC engineer who understands how a complete data center cooling system should be put together. You may have worked for a cooling OEM, HVAC consultant, contractor or operator – the key is that you can see and explain the overall cooling concept.

• Have several years of experience working with cooling/HVAC or mechanical systems in data centers, industrial plants, process facilities, hospitals or similar technically complex buildings.
• Understand how chillers (or other cooling plant), pumps, headers, heat rejection and room cooling units work together as a system.
• Can read and challenge P&IDs, plant room layouts and control philosophies and identify gaps or weak points.
• Are comfortable working with OEM specialists, asking precise questions and pushing for solutions that fit the overall architecture and operational needs.
• Can translate mechanical detail into clear options and recommendations for Project Managers, customers and operations.
• Enjoy both design discussions and site visits, seeing how the plant is physically installed and operated.

As a person, you are practical, analytical and direct. You like to simplify complex systems into clear diagrams and explanations, and you keep the focus on what will actually work in operation.

Qualifications

• Degree or vocational qualification in mechanical engineering, HVAC, building services or similar, or equivalent experience.
• Solid experience with chilled water or equivalent cooling systems; experience with free cooling or advanced concepts is an advantage.
• Practical exposure to some of the following: chillers, CRAC/CRAH units, pumps, valves, dry coolers, pipework systems and associated controls.
• Ability to read and evaluate P&IDs, plant layouts, hydraulic concepts and basic load/flow calculations.
• Experience working with OEMs or design partners on equipment selection, integration and control strategy.
• Advantage if you have worked on data center projects or other high-availability cooling systems, but strong experience from industrial/process HVAC is also relevant.
• Good communication skills in Swedish and English, spoken and written.
• Good knowledge of the Office package; experience with HVAC design or CAD tools is an advantage.