IONCOR’s Summer Trainee Program 2026

At IONCOR, we believe that the future of batteries, and the broader electrification of energy systems, depends on the people building them. That’s why we invest in early-career talent by offering meaningful responsibilities, practical learning opportunities, and direct exposure to real-world challenges and opportunities in future energy technologies.

Operating across the entire battery value chain, IONCOR provides trainee positions in a wide range of functions. Opportunities are available in areas such as sustainability, communications, human resources, finance, production, logistics, and more, reflecting the multidisciplinary nature of our business. The positions are in our locations in Salo, Turku and Uusikaupunki.

We offer summer trainee positions to help you advance in your chosen career path. Below quotes of some summer trainees from the previous years:

Christian, Summer Trainee in Change Management:

“Working as a Change Management Summer Trainee was my first step into the manufacturing industry. The experience gave me the opportunity to collaborate with a wide range of departments and understand how each function works together to produce high‑quality products in a safe and controlled environment. What stood out to me most at IONCOR was the supportive culture and colleagues who were always willing to help me learn and develop. The traineeship allowed me to develop practical skills, deepen my understanding of manufacturing processes, and build a strong foundation for the next stages of my career.”

Emilia, Summer Trainee in accounting:

“Working as a Summer Trainee in the Finance Department at IONCOR was a very positive experience. As a growing and developing company, IONCOR provided many opportunities to learn, develop my skills, and gain practical experience with financial processes. This included participating in financial close processes within a larger organizational environment.

During the traineeship, I had the opportunity to work with different departments across the organization, which helped me understand how finance supports the business as a whole and how other departments operate.

What I appreciated most was that, even as a trainee, my input was valued, and I was trusted with real tasks and responsibilities.”

Lea, Summer Trainee in HR:

“Being an HR Summer Trainee was my first work experience in the world of HR. I really enjoyed the traineeship, as it gave me a great overview of diverse HR areas and tasks. I especially valued the opportunity to take part in real HR work and everyday tasks, which helped me develop professionally. One of the things I appreciated most about IONCOR besides the practical work experience was the international atmosphere and the great colleagues, who were always ready to support me. The traineeship was a great way to gain valuable work experience and to start my career.”

Jani, Summer Trainee in forwarding:

“When I started as a forwarding trainee, I had no prior experience in the field of logistics. In that position, I learned a great deal about logistics and its role in a manufacturing company. That traineeship gave me a lot of valuable experience, and I remember everyone being welcoming and helpful, which made the traineeship even more valuable and enjoyable.”

So are you interested?

All our open summer trainee positions, including detailed job descriptions and application forms, are available on our website.

Explore open positions and apply here: https://ioncor-batteries.com/careers/

Application deadlines vary by position, so please check the individual job ads for more information.

We welcome you to apply and join IONCOR in helping to electrify the global energy transformation!