17.4.2023

Castrén & Snellman appoints Finland’s leading tax expert Janne Juusela as partner

Related services

Janne Juusela, Doctor of Laws, has been appointed as a new partner at Castrén & Snellman as of 17 April 2023. His appointment strengthens the firm’s position as a leading advisor to businesses in domestic and international taxation.

‘Janne is a highly esteemed and recognised tax lawyer in our market. His long and versatile experience as an advisor to businesses and as an active contributor to national discussion in tax issues adds greatly to our capabilities and strengthens our firm’s way forward as the forerunner of demanding legal services. Tax issues are becoming increasingly important to our customers and form one of the key drivers of our firm. With Janne joining our team, the advice we offer to our clients will become even more comprehensive and strategic to our clients,’ says Sakari Lukinmaa, Managing Partner of Castrén & Snellman.

Janne Juusela has been advising companies in matters relating to corporate taxation, international taxation, mergers and acquisitions, and tax litigation for more than twenty years. He has successfully defended clients in several of Finland’s most challenging tax disputes, such as the transfer pricing disputes of the past years. During his long career, Juusela has been advising a wide variety of companies in different industries. He is also a regular author and lecturer on tax issues.

Prior to joining Castrén & Snellman, Juusela headed the tax practice at Borenius Attorneys Ltd. He has previously worked in legislative drafting at the Finnish Ministry of Finance and as a lawyer at an international audit firm.

Mikko Alakare, head of Castrén & Snellman’s Tax & Structuring service, is a former colleague of Juusela: in the past, the two worked together on tax matters for fifteen years.

‘Janne is the absolute leader in our market. His extensive experience is a great complement to our team’s expertise, and our skilled team will now be equipped with even broader shoulders to handle any tax issues our customers may have. I would like to extend a warm welcome to Janne, the third experienced partner of our tax team. It’s great to work together again,’ says Alakare.

Juusela has been following Castrén & Snellman’s progress with interest:

‘Castrén & Snellman’s strong growth has not come unnoticed. The firm is a forerunner in many areas of business law and has clear targets for moving forward. This is an environment that inspires me. The tax team has the potential to take the service to the next level as the strategic partner of our clients. I am highly motivated to join the team in implementing the firm’s long-term strategy on its path to growth,’ Juusela says.

The demand for high-quality tax advice in companies is increasing fast. Juusela sees the changing tax environment as a challenge for businesses:

‘Tax legislation is increasing and becoming more complex. Both the OECD and the EU are introducing new tax regulations at an accelerating pace, and international regulation is being implemented in the home market. In Finland, in turn, fiscal consolidation will put pressure on increasing taxes, and the Finnish Tax Administration seeks to collect taxes from companies as efficiently as possible. Such an operating environment will inevitably cause differences of interpretation and increase the number of disagreements between companies and tax authorities. It will be increasingly important to advocate for taxpayers’ interests,’ Juusela points out.

Janne Juusela obtained his doctorate in law from the University of Helsinki in 1998 and has been acting as an adjunct professor of tax law at the University of Helsinki since 2002. He was admitted to the Finnish Bar Association in 2007. He has authored numerous books on tax law and co-authored, among other things, the renowned ‘Yritysverotus I–II’, a cumulatively supplemented handbook on corporate taxation in Finland.

Our warmest congratulations and welcome to our firm, Janne!

Castrén & Snellman

Castrén & Snellman is a forerunner of demanding legal services in mergers and acquisitions, dispute resolution and the full scope of business law. We are an international law firm seeing rapid growth in the Nordics. What makes us stand out is our straight-forward way of working, our true collaboration across teams and our long tradition of exceeding expectations. When challenges come your way, our globally recognised experts bring clear thinking and innovative solutions to the table.

We are a strategic speaking partner with a comprehensive approach. Our goal is to help our clients shape their market and build their own sustainable success stories.

Latest references

We successfully represented a Finnish construction management consultancy and a safety coordinator employed by the company in criminal proceedings concerning an alleged occupational safety and health offence. The prosecutor sought a penalty for an alleged breach of occupational safety regulations. The charge arose from a fall accident at a construction site where our client acted as the safety coordinator appointed by the developer. We assessed the scope of the safety coordinator’s duties in relation to the responsibilities of the main contractor, as well as how our client had fulfilled their obligations in practice. We demonstrated that our client had acted with due care and in full compliance with their duties throughout the planning, preparation and execution of the construction project. The District Court of Eastern Uusimaa dismissed the charge against our client. The Court held that our client, in their capacity as safety coordinator, had duly fulfilled the occupational safety obligations incumbent on the developer during the planning and preparation phases of the construction project and had not been aware of the fall protection deficiency identified at the site. The judgment is final insofar as our client is concerned.
Case published 22.6.2026
We advised Efima Oyj on the sale of its financial management services business to Rantalainen as part of its strategic focus on fully concentrating on the delivery of business applications as well as data and AI solutions. As a result of the transaction, customer contracts related to financial management services and 65 experts working in these services will transfer to Rantalainen. The transaction will be carried out as a transfer of business, and the experts will move to the new owner as existing employees. Efima is a Finnish digital company that supports the sustainable growth of large and mid-sized companies by streamlining their business processes and by creating competitive advantage through the innovative use of artificial intelligence and data. The company has nearly 200 experts based in Helsinki and Tampere.
Case published 12.6.2026
We advised lead investor Ugly Duckling Ventures on the EUR 6.5 million funding round of Skyfora. The round also included Eviny Ventures, LUMO Labs and EIC Fund, alongside non-dilutive funding from Business Finland. The investment will support the commercial scale-up of Skyfora’s weather intelligence solutions, the expansion of partnerships with telecom operators, forecasting providers and meteorological institutions, and the continued growth of the team. Skyfora is a Finnish company developing high-resolution weather data solutions using patented technology that extracts atmospheric data from GNSS receivers embedded in existing infrastructure, such as telecom networks. By unlocking previously untapped data sources, Skyfora enables the next generation of AI-driven weather forecasting and supports improved decision-making across weather-sensitive industries. Ugly Duckling Ventures is a Copenhagen-based venture capital firm focused on early-stage Nordic B2B technology companies, with an emphasis on medtech, resilience tech and business services.
Case published 10.6.2026
castren snellman general atlantic iceye
We advised General Atlantic as the lead investor on ICEYE’s EUR 1 billion series F funding round, valuing the company at over EUR 10 billion. ICEYE raised EUR 450 million (USD 520 million) in a primary Series F funding round led by General Atlantic. Additional investors included Solidium, Tesi, Varma, Ilmarinen, Lifeline Ventures, Nokia, Qatar Investment Authority (QIA) and TCV. Together with a secondary placement, the total fundraising exceeds EUR 1 billion. ICEYE is the world leader in sovereign intelligence from space, providing continuous monitoring capabilities to detect and respond to changes in any location on Earth. The company operates the world’s largest and most advanced Synthetic Aperture Radar satellite constellation. General Atlantic is a leading global investor with more than four and a half decades of experience providing capital and strategic support for over 885 companies throughout its history. As of March 31, 2026, General Atlantic manages approximately USD 126 billion in assets across its investment strategies. We advised General Atlantic on this transaction in collaboration with the international law firm Paul, Weiss, Rifkind, Wharton & Garrison.
Case published 9.6.2026