Tuomas Lehtinen

Partner, Member of the Finnish Bar, Doctor of Laws

Services

  1. International Construction & Projects
  2. Environment, Energy & Green Transition
  3. Banking & Finance
  4. Dispute Resolution
  5. Strategic Commercial

Contact details

I have dedicated over three decades to the legal profession, specialising in dispute resolution, contract law and banking. I have advised clients in complex disputes proceedings, in international arbitrations and before Finnish courts. I have served as an arbitrator in numerous domestic and international arbitrations.

My expertise extends to international construction projects, project agreements, bank guarantees, trade finance, and associated disputes. I have provided counsel to both public entities and private companies within the defence industry, drawing on a profound understanding of the sector. For over twenty years, I have been a trusted advisor in highly confidential matters for government organisations and private defence sector companies.

I hold a Doctor of Laws degree and serve as a docent in contract law and international trade law and held part-time Professorship at the University of Helsinki. My dissertation focused on international trade contracts and documentary credits. I have authored several books and articles on international contracts and guarantees.

My active involvement with the IBA’s International Construction Projects Committee and other international associations has helped me build a global network.

I am recognised by Chambers Europe, Chambers Global, and Best Lawyers as one of Finland’s leading legal experts. Clients value my vast experience, deep expertise, negotiation skills, and ability to address their business concerns fully.

Latest references

Finnish manufacturing company – Arbitration proceedings under the SCC rules
We successfully represented a Finnish manufacturing company in arbitration proceedings under the SCC rules against a global construction company. The dispute was governed by Finnish law and the seat of arbitration was Stockholm, Sweden. The dispute mainly concerned the termination of an erection contract and the right to compensation for delays of the project and for cost increases due to Russia’s invasion of Ukraine. The main questions in dispute were the lawfulness of the termination of the erection contract as well as the consequences of the termination such as the right to costs to complete the project after termination, the right to liquidated damages for delay of the project and adjustment of contract price due to cost increases. The total value of the dispute exceeded EUR 15 million.
Case published 8.1.2025
The Finnish State – The Court of Appeal dismissed the action of Peter Fryckman against the Finnish State
We successfully advised the Finnish State/the Ministry of Justice in a declaratory action in which the Helsinki Court of Appeal dismissed the claims of businessman Peter Fryckman and confirmed the non-existence of an arbitration agreement. Fryckman had filed for arbitration before The Hague’s Permanent Court of Arbitration (PCA) in February 2018. The request was based on a claim that the Finnish Minister of Justice had signed a consent to arbitration between Fryckman and the Finnish State in the PCA. The State denied the existence of an arbitration agreement in its response to the request for arbitration and refused to appoint its own arbitrator. The Secretary-General of the PCA deemed that the document titled ‘Declaration of Consent’ was too ambiguous and general in nature, and therefore he could not appoint an arbitrator for the State to an arbitration conducted under the PCA Arbitration Rules 2012. After this, Fryckman requested that the District Court confirm the existence of an arbitration agreement between him and the Finnish State, under which disputes between the parties concerning tax and debt collection actions against Fryckman and his companies, as well as the resulting damages, would be settled before the Permanent Court of Arbitration in The Hague.  However, the District Court dismissed this action because the consent signed by the Minister of Justice was general in nature, its content was unspecified, and it was unclear whether the consent was even a matter that could be arbitrated. Furthermore, the District Court deemed that the consent signed by the Minister of Justice and the plaintiff’s application for commencement of arbitration were not identical and reciprocal, and there was no evidence of an agreement between the parties as to the commitment to and content of the agreement. Fryckman appealed the District Court’s decision to the Court of Appeal, but in its judgement of December 2022, the Court of Appeal deemed that there was no cause to amend the District Court’s decision. The Court of Appeal found that the expression of will in the document titled ‘Declaration of Consent’ had not been made in accordance with the Ministry of Justice’s procedure for presentation and decision-making. According to the Court of Appeal, due to this key fault in the Ministry’s procedure, the free-form expression of will by the Minister did not have a binding effect on the parties. The Court of Appeal remarked that the plaintiff’s actions bore characteristics of an intent to bypass the Ministry’s customary procedure for decision-making. The Court of Appeal also noted that the Minister’s expression of will was encumbered by deficiencies in arbitrability and the subject matter of the consent as stated by the District Court, and referred to the grounds stated by the District Court in other respects as well. On 5 May 2023, the Supreme Court ruled that no leave to appeal would be granted, and the judgment of the Court of Appeal is therefore final.
Case published 27.6.2023
FinnHEMS – Set-Aside Proceedings of an Arbitral Award
We represented FinnHEMS Oy, the company in charge of Helicopter Emergency Medical Services (HEMS) operations in Finland, in set-aside proceedings. In 2016, an arbitral tribunal rendered an award dismissing the claims presented by FinnHEMS against one of its service providers. The arbitral tribunal accepted that the service provider had breached the agreement, but decided not to award any compensation to FinnHEMS, as the arbitral tribunal considered FinnHEMS to have failed to give notice of the breaches within a reasonable time. However, the service provider had not invoked failure to give notice as grounds for disputing the claim during the arbitration. Consequently, FinnHEMS initiated set-aside proceedings in the District Court of Helsinki. The District Court of Helsinki accepted FinnHEMS’ action and set the award aside. The service provider appealed to the Helsinki Court of Appeal, which also found in favour of FinnHEMS. Both the District Court of Helsinki and the Helsinki Court of Appeal accepted FinnHEMS’ argument that the arbitral tribunal had failed to provide FinnHEMS with sufficient opportunity to present its case and had exceeded its jurisdiction when basing its award on grounds not invoked by the parties in the arbitration. The Supreme Court did not grant the service provider leave of appeal, making the decision by the Helsinki Court of Appeal final.  The threshold for a court to set aside an award is high. Arbitral awards are meant to be final and can only be challenged on very limited grounds. All in all, there is very little legal praxis available relating to set-aside proceedings and even less so where an arbitral award has actually been set aside. Nevertheless, FinnHEMS was able to show that the arbitral tribunal had exceeded its jurisdiction and failed to provide FinnHEMS with sufficient opportunity to present its case to such a degree that the arbitral award was set aside. The final decision by the Helsinki Court of Appeal is noteworthy and rare in Finland and provides good guidance for future cases with respect to the limits of the powers of arbitral tribunals.
Case published 11.5.2020
Finnish Defence Forces – Squadron 2020 Project
We advised the Finnish Defence Forces Logistics Command in the Squadron 2020 project. Squadron 2020 is the Finnish Navy’s project that is aimed at replacing seven vessels that the Navy will decommission. These will be replaced by four modern corvettes. Rauma Marine Constructions Oy and RMC Defence Oy based in Rauma will construct four multi-purpose corvettes, called the Pohjanmaa Class, for the Squadron 2020 project. Saab AB from Sweden was selected as the  combat system supplier. The Pohjanmaa Class will form the backbone of the Finnish Navy’s capability and combat vessel fleet and is planned to remain in service until the 2050s. The total cost of the Squadron 2020 project is approx. EUR 1,300 million.
Case published 16.3.2020
International reinsurance companies – Ad hoc arbitration proceedings
We successfully represented a panel of reinsurance companies in an international ad hoc arbitration. The dispute arose out of a reinsurance treaty under the terms of which the reinsurers had reinsured a portfolio of risks underwritten by the cedent. The parties disagreed as to whether the reinsurance provided coverage for a certain loss that had occurred because of the market turmoil caused by the Covid-19 pandemic. The case involved highly complex legal and contractual questions requiring special expertise on reinsurance law and practice. The arbitral tribunal rejected the counterparty’s claims for reinsurance compensation against our clients in full. The amount in dispute was approximately EUR 34 million.
Case published 16.9.2025
byFounders.vc – DataCrunch’s USD 64 million Series A funding round
We supported byFounders.vc as the Finnish counsel in their investment in DataCrunch Oy in a USD 64 million Series A funding round. DataCrunch provides scalable AI compute solutions from energy-efficient data centers in Iceland and Finland. byFounders.vc is the community-powered early-stage venture fund investing in globally ambitious teams connected to the Nordic and Baltic countries.
Case published 11.9.2025
Springvest – ReOrbit’s EUR 45 million Series A funding round
We advised Springvest Oyj in organising a EUR 45 million Series A funding round for ReOrbit, a space technology company and a leading provider of software-first satellites. It’s the largest all-equity Series A round in Finland and one of the most significant deals overall in the European space and defence sector. The purpose of the funding round is to support ReOrbit’s growth. The round consisted of a private placement reserved for professional and institutional investors, which included, e.g. Icebreaker.vc, Expansion VC, 10xFounders, Inventure VC, Varma Mutual Pension Insurance Company, and Elo Mutual Pension Insurance Company, and an EUR 8 million public share offering, which was oversubscribed within 4.5 hours. Springvest is a Finland-based investment firm that connects unlisted growth companies with investors. ReOrbit builds sovereign satellites and connected systems for national security.
Case published 9.9.2025
Ten Eleven Ventures & Tesi – EUR 275 million Series B financing round of IQM Quantum Computers
Castrén & Snellman advised the lead investors Ten Eleven Ventures and Tesi in the EUR 275 million Series B financing round of IQM Quantum Computers, the global leader in building quantum computers. The round is largest Series B round ever in Finland and the second largest in the Nordics. In addition to the lead investors represented by C&S, the round was participated by several new and existing investors, including pension funds Elo Mutual Pension Insurance and Varma Mutual Pension Insurance, strategic investors Companies of Schwarz Group and Winbond Electronics Corporation, and sovereign wealth funds EIC and Bayern Kapital. Ten Eleven Ventures is the original cybersecurity-focused, global, and stage-agnostic investment firm. The firm identifies, invests in, and helps grow top cybersecurity companies addressing critical digital security needs, leveraging its team, network, and experience to build successful businesses. Since its founding, Ten Eleven Ventures has raised over USD 1 billion and made over 60 cybersecurity investments across various stages worldwide. Tesi (Suomen Teollisuussijoitus Oy / Finnish Industry Investment Ltd) is a state-owned investment company with an industrial policy mission focused on driving economic growth, renewal, and investments. Tesi invests on market terms both in venture capital and private equity funds, and directly in startups, scale-ups, and large industrial projects. IQM Quantum Computers, founded as a deep tech spin-off from Aalto University in 2019, specialises in developing quantum computers utilizing superconducting circuits. The company designs and produces quantum processors at its facility in Espoo, providing computing solutions and optimizations tailored to both research and industrial applications. In addition to its Finnish operations, IQM has expanded its presence to Germany, France, Italy, Japan, Poland, Spain, Singapore, South Korea, and the United States.
Case published 4.9.2025

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