Tarja Pirinen

Partner, Member of the Finnish Bar

Services

  1. Environment, Energy & Green Transition
  2. Infrastructure & Industrial Projects

Contact details

I advise clients in exploration and mining projects as well as in industrial and infrastructure projects in general.

I have more than 20 years of experience in providing comprehensive advice to exploration and mining companies on a wide range of matters arising throughout the project’s life cycle. I advise mining and other clients in permitting and regulatory processes, arrangements concerning the acquisition of permits, rights of use and access rights, administrative procedures, nature conservation and environmental liability matters, and commercial contracts. I have also assisted clients in several transactions and financing arrangements in the mining sector. Chambers Europe has ranked me among Finland’s leading energy and natural resources lawyers, and Lexology has listed me as one of Finland’s leading mining lawyers.

In my work, I have a practical and straight-forward approach. Knowing and understanding the client’s business and industry is essential in delivering effective, business-oriented legal solutions that promote the client’s business. While high-quality legal advice is the foundation of assisting clients, I also recognise that legal considerations are just one part of a broader picture. Technical factors, project timelines and financing matters may play a crucial role in a project or the client’s business, and they need to be taken into account in order to find the best solution or way forward for the client’s project and business.

Latest references

Terrafame – Environmental and water management permit processes concerning the company’s entire operations and the KL1 side rock area
Castrén & Snellman successfully assisted Terrafame Ltd in environmental and water management permit processes concerning the company’s entire operations and the KL1 side rock area, on which the Supreme Administrative Court issued its decision on 12 February 2026 (KHO 366/2026 and 367/2026). The changes made to the decisions of the Vaasa Administrative Court as a result of Terrafame’s appeals, enable the company to implement its new strategy and develop its operations as planned. The decisions of the Supreme Administrative Court brought the nearly ten-year-long permit process to a close.
Case published 20.2.2026
castren snellman general atlantic iceye
General Atlantic – ICEYE’s EUR 1 Billion Series F Funding Round
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
Oomi Solar – Sale of a Solar Power Plant and Battery Energy Storage Project
We advised Oomi Solar Oy on the sale of a solar power park and battery energy storage project to Tuulipolar Oy. The transaction concerned a 24 MWp solar power plant and a 36 MW / 70 MWh battery energy storage system (BESS) to be constructed in Tornio. Tuulipolar Oy will act as the owner and operator of the plant, while Oomi Solar Oy will be responsible for its design and construction. The project will form the world’s northernmost industrial hybrid power plant, contributing to Finland’s green energy transition by increasing renewable energy production and electricity storage capacity in Northern Finland. The hybrid solution enables optimization of production as well as active participation in electricity markets and reserve services, improving the project’s profitability and supporting the balance of the electricity system year-round. Electricity production from the hybrid plant is expected to begin in 2028. Oomi Solar Oy is a Finnish renewable energy expert with experience from nearly 200 MW of installed solar capacity. The company helps businesses and communities accelerate the green transition by offering comprehensive solutions, including solar power plants, energy storage systems, and related lifecycle services from project development to maintenance. Oomi Solar Oy employs more than 20 energy professionals and delivers solar power projects across Finland. The company’s vision is to be Finland’s most desired partner for solar energy and energy solutions.
Case published 5.6.2026
United Bankers – Sale of three care properties
United Bankers – Sale of three care properties
We advised United Bankers on the sale of three care properties to Kinland AS. The buildings were completed between 2021 and 2022 and meet high technical and environmental standards. All three properties are fully leased. The portfolio has a weighted average unexpired lease term of 13 years.
Case published 1.6.2026
Hiab acquisition financing
Hiab – Financing for USD 1,035 million acquisition of Labrie Environmental Group
We are advising Hiab Corporation in the financing for its USD 1,035 million acquisition of Labrie Environmental Group, a leading North American refuse collection vehicle (“RCV”) manufacturer, from Wynnchurch Capital, L.P. Hiab Corporation (Nasdaq Helsinki: HIAB) is a leading provider of smart and sustainable on-road load handling solutions, with 2025 sales of approximately EUR 1.6 billion and approximately 4,000 employees, operating through a global network spanning over 100 countries. Labrie Group is a leading North American provider of RCVs, employing approximately 1,200 people. 
Case published 1.6.2026
Lenders to ICEYE – EUR 300 million revolving credit facility for ICEYE
We advised an international bank syndicate in a EUR 300 million revolving credit facility (RCF) for ICEYE, the world leader in sovereign intelligence from space. The bank-syndicate comprised Nordic and global banks, with Citi and Danske Bank acting as Joint Global Coordinators and Mandated Lead Arrangers. The RCF will support the issuance of guarantees for customer contracts, enable continued business growth, and serve as a liquidity backstop. 
Case published 21.5.2026
Terrieri Kiinteistöt, A. Ahlström Kiinteistöt and S-Bank Building Plot non-UCITS Fund – Sale of a production and logistics property
We are advising Terrieri Kiinteistöt Ky and A. Ahlström Kiinteistöt Oy in the sale of a modern production and logistics building complex to Swedish property investment company Catena AB. We are also assisting S-Bank Building Plot non-UCITS Fund which in connection with the transaction, has agreed to sell the land area where the building complex is located to Catena AB. The building complex located in the immediate vicinity of Helsinki-Vantaa Airport was completed in 2021 and comprises approximately 23,260 square metres of leasable area, fully leased to Cramo Finland Oy. The approximately 140,000-square-metre plot offers additional long-term development potential in the form of approximately 45,000 square metres of additional building rights.
Case published 21.5.2026
Huhtamäki – EUR 300 million bond and tender offer of bond maturing in 2027
We advised Huhtamäki Oyj on its issuance of a EUR 300 million 6-year senior unsecured bond under the EMTN programme and on the tender offer of its EUR 500 million senior unsecured bond maturing in 2027. The new bond bears interest at a fixed rate of 3.875 per cent per annum. Huhtamäki used the net proceeds from the issuance of the new bond for the partial repurchase of its bond maturing in 2027 and for general corporate purposes.
Case published 21.5.2026

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