Principal Mechanical Critical Systems Engineer

Cundall; Warszawa; On-site; PLN 180,000 - 240,000; Full time

Job summary

Cundall is seeking an experienced Principal Engineer to join its data centre team. You will lead mechanical design delivery across high‑profile projects, engage with clients, and shape technical strategies. The role supports the DC101 training path and mentoring for junior engineers.

You will drive regional and global project delivery, collaborate with multidisciplinary teams, and contribute to proposals and business development while maintaining high technical standards.

Qualifications

• Qualified engineer educated to a degree level in Mechanical Engineering, Building Services Engineering or a related technical discipline. You may be Chartered or working towards chartership; we will support your career path.

Responsibilities

• Deliver accurate mechanical design solutions including HVAC, air‑conditioning, chilled water, ventilation, equipment selections, public health and building management services systems.
• Produce mechanical designs for HVAC and public health and building management services systems.
• Prepare technical specifications, schedules, calculations, project reports and supporting documentation.
• Conduct site inspections and surveys to inform design development.
• Develop detailed and coordinated design solutions in collaboration with multi‑disciplinary teams.
• Contribute to internal and external project meetings, providing mechanical expertise and updates.
• Assist with fee proposals and business development activities as required.
• Collaborate with colleagues across regional and international offices on project delivery.

Skills

Mechanical design

HVAC

Building services

Client-facing

Project leadership

Education

Bachelor's degree in Mechanical Engineering

Job description

The Team

We are a global, independent, multi‑disciplinary consultancy delivering sustainable engineering and design solutions across the built environment. With more than 1,200 engineers and designers across 29 locations, we apply our expertise to local market conditions to deliver resilient, low‑carbon engineering solutions. We are 100 % partner‑owned and were named Building Magazine’s Engineering Consultant of the Year in 2024, 2022 and 2021.

Our dedicated data centre team was established in 2006 and has delivered over 2,000 MW of capacity worldwide. In 2025 we were named Data Centre Consultancy of the Year by Data Centre Review and ranked in the Top 10 by Data Centre Magazine in 2023.

The Role

We’re looking for an experienced, client‑focused Principal Engineer with mechanical design experience to join our data centre team.

You will have excellent mechanical design and consulting experience, ideally from a highly technical background. Your previous project experience should demonstrate an ability to transition into our data centre sector. Previous data centre experience is not required, as our DC101 programme will mentor you and provide the skills, context and support to succeed.

You’ll play a leading role in some of the most high‑profile data centre projects worldwide. You will drive delivery of regional and global projects, engage directly with clients, shape technical strategies and review and develop designs. You’ll be trusted to take ownership of your work while being supported by a team of experienced engineers.

As a Principal, you’ll also support the development of junior engineers and contribute to project planning and fee proposals, helping bring technical expertise to the market and shape the direction of our growing team.

Responsibilities

• Deliver accurate mechanical design solutions including HVAC, air‑conditioning, chilled water, ventilation, equipment selections, public health and building management services systems.
• Produce mechanical designs for HVAC and public health and building management services systems.
• Prepare technical specifications, schedules, calculations, project reports and supporting documentation.
• Conduct site inspections and surveys to inform design development.
• Develop detailed and coordinated design solutions in collaboration with multi‑disciplinary teams.
• Contribute to internal and external project meetings, providing mechanical expertise and updates.
• Assist with fee proposals and business development activities as required.
• Collaborate with colleagues across regional and international offices on project delivery.

Qualifications & Skills

Qualified engineer educated to a degree level in Mechanical Engineering, Building Services Engineering or a related technical discipline. You may be Chartered or working towards chartership; we will support your career path.

You have experience in a consulting engineering role and are looking for greater responsibility and impact. We value engineers who bring initiative, problem‑solving and a collaborative mindset to their work.

Previous data centre experience is not required, and our DC101 programme provides in‑depth technical training and support.

Diversity & Inclusion

We positively welcome applications from people of all backgrounds and identities, and we encourage, support and celebrate the diverse voices of our people. Creating inclusive environments where everyone can find joy doing their best work is part of our culture.