6.3.2022

Career Stories: Ilona Karppinen

The Most Important Characteristics for a Lawyer are Curiosity and the Desire to Learn New Things

Ilona Karppinen has had a long and eventful career path at Castrén & Snellman, from her start as a junior trainee to her current position as Partner Elect.

Ilona’s path at C&S began as a junior trainee in the autumn of 2003 during her second year of studies. She continued at C&S as a supervising trainee before moving on to our newly launched knowledge management trainee programme. After a student exchange in France, Ilona returned to the firm as a senior trainee and then as a project trainee. In 2007, Ilona graduated from the legal faculty and started work as an associate.

Ilona’s key expertise is dispute resolution and company law. Among other things, she handles domestic and international commercial disputes. Challenging and long litigation and arbitration proceedings require that the lawyer handling the case gets to know both the business and the device, data system or other issue subject to the dispute in great detail. There is something new to learn every day.

“Every assignment is an opportunity to learn. As a lawyer, you have to get to know the client’s industry, product and entire business’, Ilona says.

‘That is why it is important for a lawyer to be curious and have a desire to understand and learn new things. In this job, you have no choice but to keep developing yourself.’

Court training and secondments developed legal skills

Though Ilona has built her career in the same firm, she has succeeded in bringing variety into it. In 2009, she did her court training at the Helsinki District Court and got a view of litigation from the other side of the bench—fully realising what the anatomy of independent decision-making.

In 2013, Ilona was on secondment at Rautaruukki (now part of SSAB following a corporate transaction),and learned extensively about contract law and what the services of a law firm look like from the client’s perspective. Four years later, she spent nine months working at one of Sweden’s largest law firms, Mannheimer Swartling.

‘I am very grateful to my firm and supervisor for the support they have always given me in realising my career dreams. That support made it possible for me to work at Mannheimer Swartling and develop my international experience.’

International organisations have also played a large role in Ilona’s career. She is active in the world’s largest organisation of attorneys, the International Bar Association, holding various positions of trust on the association’s Litigation Committee. Ilona considers it important for every lawyer to network extensively and be active in professional organisations. Being active in international organisations provides the opportunity to meet the best lawyers from around the world.

Learning takes enthusiasm

Continual learning is a must for an attorney. The Finnish Bar Association obligates its members to attend at least 18 hours of training a year. Ilona is grateful for the extensive internal training Castrén & Snellman organises for its personnel, including the Cassu College training series, which covers current topics in the legal services industry and beyond.

Ilona certainly agrees with the notion that working as a lawyer is career of life-long learning.

‘My dream is to keep developing and learning at Castrén & Snellman. Continually developing your expertise is a big part of what makes working as a lawyer meaningful and interesting.’

Latest references

We acted as Finnish law legal adviser to the lenders and the export credit agencies in connection with the EUR 514.4 million green project financing for the development and construction of Easpring Finland New Materials Oy’s cathode active material (CAM) manufacturing plant in Kotka, Finland. The borrower, Easpring Finland New Materials Oy, is a joint venture owned by Beijing Easpring Material Technology, Finnish Minerals Group and LG Energy Solution. The financing was provided by six international commercial banks, with Société Générale acting as financial adviser and mandated lead arranger together with Natixis as co-mandated lead arranger, and DNB, ICBC, ING and Standard Chartered participating as lenders, with support from the export credit agencies Finnvera and Sinosure. The project represents a significant milestone for Finland and the European battery value chain by strengthening Europe’s domestic supply of cathode active materials, a key component in lithium-ion batteries for electric vehicles and energy storage applications. Once the first phase of the project is operational, the Kotka facility is expected to produce approximately 60,000 tonnes of cathode active material annually, making it one of the largest CAM production plants in Europe and supplying leading battery manufacturers across Europe. 
Case published 21.7.2026
We acted as Finnish legal advisor to Delta Capacity in connection with its acquisition of the ready-to-build Karppio battery energy storage system (BESS) project from Helios Nordic Energy. The acquisition was made and the project will be implemented together with Strioga Family Foundation. The Karppio BESS project is located in Teuva, Finland, and has a capacity of 125 MW / 300 MWh. Delta Capacity will lead the remaining development of the project through to commissioning, planned for 2027, and will serve as long-term asset manager. Delta Capacity is a Swiss-based developer of utility scale battery storage systems. The acquisition adds to Delta Capacity’s growing Nordic portfolio. 
Case published 20.7.2026
We advised Swedbank AB (publ) on the refinancing of a large Finnish retail real estate portfolio owned by Trophi’s Finnish subsidiaries. Trophi is the leading Nordic real estate company focusing on grocery anchored retail properties, with 278 properties across Sweden and Finland. Finland is a market that continues to develop and is also strategically important for Trophi, accounting for approximately 30% of Trophi’s letting and property value.
Case published 17.7.2026
We are acting as Finnish legal advisor to HANZA in connection with its acquisition of Fortaco Finland’s heavy mechanics and assembly business. The transaction is structured as a combined asset and share acquisition and includes Fortaco Finland’s heavy mechanics and assembly operations in Finland, as well as shares in two Estonian and two Polish subsidiaries. The transaction is expected to close during the fourth quarter of 2026, subject to customary closing conditions, including regulatory approvals. Founded in 2008, HANZA is a Swedish mechanical engineering and electronics contract manufacturing company listed on the Nasdaq Stockholm main list. HANZA has approximately 5,000 employees and annual sales of SEK 10 billion. We advise HANZA on this transaction in collaboration with the Swedish law firm Lindahl.
Case published 15.7.2026