Dittmar & Indrenius

Member of Ius Laboris, Association of European Lawyers

Sector knowledge

Antti Aaltonen

Counsel Antti Aaltonen focuses on large-scale real estate transactions, demanding lease arrangements as well as a wide variety of general real estate issues. Antti Aaltonen is known for having over 30 years of experience in all fields of real estate law and he has a solid knowledge of the Finnish real estate market and the needs of its various market players. He has been able to gain a loyal long-term client base. Among his peers, Antti Aaltonen is a highly respected and well-liked figure. Antti Aaltonen advises clients on both portfolio and large single asset real estate transactions. He has an outstanding track record, particularly in transactions involving office, logistics, industrial, and public use properties. He also has extensive experience in forest transactions.

Anders Carlberg

Partner Anders Carlberg is known for demanding high-profile transactions focusing on complex cross-border transactions in the fields of public and private M&A, private equity and capital markets. He regularly represents private equity houses and financial institutions and is a trusted strategic speaking partner to many of Dittmar & Indrenius’ long-lasting clients. He was the Managing Partner of the firm in 2015–2022 and is a Senior Partner since 2023.

Gabrielle Dannberg

Managing Partner Gabrielle Dannberg regularly advises clients on complex cross-border and domestic M&A transactions and commercial contract negotiations. Gabrielle Dannberg advises clients across multiple industries and her client base includes long-standing corporate clients, family offices and recurring private equity firms. She has special focus on technology transactions and broad experience from a wide range of industries including software and SaaS, media, accommodation, transport, automotive and construction.

Mikko Eerola

Partner Mikko Eerola has over 20 years of experience advising private equity sponsors, infrastructure funds and industrial clients on complex cross-border and domestic transactions and projects. Mikko Eerola is widely recognised as a prominent Finnish corporate lawyer, valued for his skill and straightforward approach to deal-making. Mikko Eerola’s work is particularly focused on the energy, infrastructure, digital, and renewable sectors. Over the past fifteen years, he has been involved in a significant number of major transactions and projects, representing both international and domestic financial sponsors and industrial clients in these sectors within the Finnish market. His transactional experience is broad covering a wide range of industries, including accommodation, automotive, consumer goods, forestry, pharmaceuticals, retail and technology.

Eila El Asry

Senior Attorney Eila El Asry regularly advises both international and domestic clients especially in matters relating to the use and protection of IPR and data assets, as well as in the preparation and negotiation of technology agreements. In addition, she works in matters related to open-source software. Eila El Asry also advises in technology intensive transactions and has experience in supporting clients in technology and IPR disputes.

Anna Haapanen

Partner Anna Haapanen focuses on technology transactions, complex IP and ICT-intensive contracts, negotiations and disputes, as well as data assets and intellectual property licensing, with special expertise in free and open-source software. She is recognized as one of the leading technology lawyers with international education and multijurisdictional work experience. She is dual-licensed attorney admitted to both the Finnish Bar and the New York Bar and has practiced law in Finland, Sweden and the United States. She has earned Doctor of Laws degree in intellectual property laws and advises clients with both non-contentious and contentious technology, IP and data intensive assignments also within the highly regulated fields such as health tech and fintech. Anna Haapanen is Chair of the International Technology Law Association’s (ITechLaw) Technology Sourcing Committee as well as former President of the International Federation of Computer Law Associations (IFCLA) and former Chairman of the Finnish IT Law Association. She has also served at the Delegation of the Finnish Bar Association, the highest decision-making body of the Finnish Bar Association. Anna Haapanen has extensive legal expertise across the technology sector, including notable visiting lawyer positions at prominent tech companies such as Supercell, Accenture, Nokia, and Comptel.

Jonatan Hallvar

Counsel Jonatan Hallvar plays a leading role in D&I’s energy and infrastructure practice and is a member of the real estate practice. He focuses on energy and infrastructure projects and regularly advises on energy related transactions. He also has significant experience from real estate and mergers and acquisitions.

Seppo Havia

Partner Seppo Havia focuses on complex precedent-setting employment law matters and employment law-related dispute resolution. He has extensive experience and insight into Finnish and international employment and pensions law and employee benefits-related matters, including reorganisations, M&A, outsourcing arrangements and dispute resolution. He has been representing multiple Finnish and international corporate clients in complex employment-related matters and employment litigations. Seppo Havia has been the lead partner, among others, in representing the largest Finnish listed forest and technology industry companies in precedent-setting and high-profile court cases regarding criminal and damage claims against labour unions based on illegal strikes.

Kai Holkeri

Partner Kai Holkeri is known for high-end transactional work. He has a unique expertise in international tax structuring and is actively engaged in general corporate tax work and tax disputes, especially related to transfer pricing. He advises large Finnish companies as well as multinational groups, investors, banks and financial institutions in their Finnish tax matters and complex transactions.

Toni Kalliokoski

Partner Toni Kalliokoski specializes in complex commercial litigation, particularly damages cases. He has also gained extensive experience in various types of regulatory litigation. In addition to contractual disputes, he has gained particular experience in competition litigation (antitrust damages) and professional liability cases. He has acted in regulatory disputes against regulatory authorities or private parties in the fields of competition law, data protection, state aid, electricity markets, telecoms, banking, pharmaceuticals and EU sanctions, among others. Toni Kalliokoski regularly publishes academic texts on competition litigation and lectures on topics related to dispute resolution. He has been ranked in Chambers and Partners and The Legal 500 particularly for his expertise in competition and EU law related disputes.

Kristian Karlsson

Partner Kristian Karlsson is known for advising clients on matters relating to securities law and financial regulation with a particular emphasis on Fintech, investment funds and investment services. He also represents borrowers and lenders in connection with financing transactions, including acquisition and project financing, bond issuances, securitization and structured financing. Kristian Karlsson is the Finnish member of the Monterey Funds Club, an association of European fund law specialists, and acts as a member of the Securities and Finance Law Expert Group of the Finnish Bar Association. He has worked as a visiting lawyer with Nordea Funds Ltd and as a Consultant in European Investment Bank in Luxembourg.

Iiris Kivikari

Partner Iiris Kivikari is known for her dynamic and insightful approach to matters involving intellectual property, media law, data protection and data assets. She works closely with leading global and Finnish companies on the legal aspects of the development, acquisition, protection and commercialisation of their innovative products, services and businesses, and is a leading expert in Finland on the legal aspects of transformative technologies such as artificial intelligence. Iiris Kivikari advises clients in the full scope of intellectual property matters, including the protection, structurization and enforcement of, and transactions and contracting related to IP and IP heavy businesses. To add to this, she works closely with clients in the sectors of communications, consumer retail, broadcasting, entertainment, advertising, digital consumer services, social media, gaming, fintech and platform services. Iiris Kivikari regularly represents clients in some of the most high-profile intellectual property, data protection and consumer related disputes and administrative proceedings in Finland and is an experienced negotiator.

Suvi Knaapila

Partner Suvi Knaapila is known for her highly regarded expertise in the field of employment, benefits and pensions. She advises clients in all their HR-legal matters, specializing also in whistleblowing, internal investigations and HR related dispute resolution.

Jussi Koivusalo

Jussi Koivusalo advises international and domestic clients on matters relating to all aspects of competition law, public procurement and state aid. His expertise also covers EU law and disputes concerning competition law as well as administrative judicial proceedings. Jussi Koivusalo has a broad understanding of competition law issues related to mergers and acquisitions as well as horizontal and vertical cooperation, including issues such as information exchange between competitors and the competition law assessment of distribution agreements. Thanks to his work experience, Jussi Koivusalo has an excellent understanding of both the operations of competition authorities and the right ways to interact with them. He has also assisted in several administrative judicial proceedings in the fields of e.g. data protection law and medicines regulation. Jussi Koivusalo regularly publishes on competition law topics in different channels and trains clients on various competition law compliance topics. He is also pursuing a doctorate in EU competition law focusing on the interplay between EU competition law and the EU’s other policy objectives at the University of Helsinki.

Jasper Kuhlefelt

Partner Jasper Kuhlefelt specialises in complex corporate transactions with particular focus on private equity sponsors and their portfolio companies. Jasper Kuhlefelt also regularly advises investors and targets on venture capital and growth equity investments and has substantial experience in advising clients on public M&A and equity capital markets transactions. Jasper Kuhlefelt is known for his ability to combine technical expertise and thoroughness with a practical and solutions-oriented approach. Clients also laud him for his commitment and availability.

Mika Kärkkäinen

Partner Mika Kärkkäinen is a seasoned employment law professional known for his trusted advice and hands-on approach to client matters. In addition to his advisory work, he has substantial experience representing employers in dispute resolution. He has acted as counsel to employers in a number of cases before the Supreme Court of Finland and has argued three cases before the European Court of Justice. Mika Kärkkäinen is also frequently engaged to conduct internal investigations. Mika Kärkkäinen is regularly invited to lecture and share his knowledge at various professional events. He is co-author of three books on employment law.

Jussi Lehtinen

Partner Jussi Lehtinen is recognised as a leading international arbitration practitioner. He is nominated to Hall of Fame of dispute resolution in Finland by The Legal 500. He is known for success in challenging international arbitration proceedings under the rules of the major arbitration institutes as well as complex litigation proceedings in public courts, including demanding administrative court proceedings. He serves demanding corporate clients in preventing and resolving all commercial conflicts, most often involving complex cross-border elements requiring professional experience from various jurisdictions. His wide-ranging caseload includes advising clients successfully in high-profile cases related to energy projects and regulation, construction, M&A, banking and financial transactions, pharmacy, taxation, IPR, ICT, competition, competition damages litigations, as well as data protection and cyber security matters. He is continuously acting as arbitrator in international and domestic arbitration proceedings.

Helen Lehto

Helen Lehto’s experience covers arbitration proceedings under the rules of several major arbitration institutes, such as the ICC, SCC, DIA, Swiss Rules and FAI. She frequently sits as arbitrator and has experience working at an arbitration institute. Having advised clients across a wide range of industries, Helen Lehto has broad experience in all types of disputes concerning matters such as international trade, share purchase agreements, supply agreements, engineering, real estate and product liability. She also regularly lectures on arbitration, mediation and litigation, and often acts as speaker at international arbitration conferences in a variety of countries. She is also a trained mediator and frequently acts as counsel to clients in mediations and med-arb proceedings. She is currently also working on her Doctor of Laws degree at the Faculty of Law of the University of Turku on the topic of “State Sovereignty and Arbitration – Resolving Interstate Disputes in Arbitration”.

Ilkka Leppihalme

Partner Ilkka Leppihalme has more than a quarter of a century of experience in competition law – including also in Brussels. He has been involved in various landmark competition cases, including the largest cartel cases in Finland and many ‘first-ever’ situations. He possesses significant experience in both national and multijurisdictional merger control procedures across a wide range of industries as well as in foreign direct investment (FDI) control. Leppihalme has represented clients in numerous significant competition law related damages cases. He defended two companies in the precedent-setting asphalt cartel damages cases until the end of the hearing in the Helsinki Court of Appeal – all of the claims against both companies were dismissed. Leppihalme has been a Non-Governmental Advisor to the International Competition Network – a network of more than 130 competition authorities – since 2010. He was one of the few members of the Competition Law Expert Group of the Finnish Bar Association in 2010-2024. He is a regular chairman and speaker at competition law conferences and seminars, including being chairman of Finland’s biggest annual commercial competition law conference annually since 2009. Leppihalme is listed as a leading competition law expert in all major international ranking publications, including e.g. being again ranked in ‘Band 1’ by Chambers Europe in 2025, being again ranked in ‘Hall of Fame’ by The Legal 500 EMEA in 2025, being again the only Finnish competition lawyer ranked as ‘Global Elite Thought Leader’ in Lexology Index – Competition 2026, and being again the only Finnish competition lawyer Lexology Index awarded the ‘Client Choice’ award in the Lexology Index Client Choice 2026 report.

Jukka Lång

Partner Jukka Lång is known for his solution-oriented approach and extensive experience in data protection matters and his capability to understand client’s business needs relating to the use of data in today’s evolving business landscape. Jukka Lång is the leading Finnish lawyer in the field of data protection and privacy and a trusted strategic speaking partner and advisor for many innovative Finnish listed companies in all their business matters relating to data protection and cyber security. He advises clients in large-scale international data protection and data security compliance projects and provides strategic advice, for example, in projects relating to adaption of artificial intelligence, data transfers and connected devices. He has also represented clients in ground-breaking data protection disputes in different Finnish courts, including the Supreme Administrative Court, and on the EU level in the Court of Justice of the European Union in Luxembourg. Since 2012 he has been teaching a course of data protection law and contracts at the Faculty of Law, University of Helsinki, and he has served as chairman of the Finnish Bar Association’s Technology, Communication and Data Protection expert group 2018–2024. Jukka Lång started his career in data protection law as an inspector of the Finnish Data Protection Authority in 2003.

Hanna-Mari Manninen

Partner Hanna-Mari Manninen heads Dittmar & Indrenius’ Strategic Advisory services. Her focus is on sustainability, ESG and corporate law with a strong background in finance and fintech. Hanna-Mari Manninen advises corporations and financial institutions, including their boards, on ESG compliance and governance matters, often in context of transactions, crisis management and third-party management. Her recent experience includes advising clients in relation to new regulation such as CSRD, CSDDD, and related omnibus initiatives, and assisting with respective compliance frameworks and corporate governance issues. Hanna-Mari Manninen’s other industry passion lies in fintech. She has extensive experience in financing and financial regulation with in-depth knowledge of payment services regulation. She is also known for driving a strong compliance culture in the fintech field. Hanna-Mari Manninen regularly advises both leading financial institutions and other fintechs on regulatory compliance. In addition to her legal expertise, Hanna-Mari Manninen is Chair of the Board of UN Women Finland and also holds other board memberships and positions of trust. As a passionate advocate for good governance, she frequently chairs general meetings and trains boards and management teams.

Juli Mansnérus

Partner, Dr. Juli Mansnérus, Head of Patents and Life Sciences, is admitted to the Finnish Bar and holds both Swedish and Finnish law degrees. She earned a Doctor of Laws degree with a focus on intellectual property and pharmaceutical law, establishing herself as a key advisor in pan-European litigation for pharmaceuticals, medical devices, and other technology-driven industries. Her practice encompasses both contentious and non-contentious matters, guiding clients in regulatory and strategic challenges from R&D and commercialization to market access and pharmaceutical marketing. Her Master of Sciences in Translational Medicine from the University of Edinburgh gives her an invaluable perspective on the evolving needs of life sciences, pharmaceutical, and health technology companies. Dr. Mansnérus has served as Vice Chairman of the Finnish Copyright Council and is an alumna of Young Academy Finland. She continues to conduct post-doctoral research and teach various law courses at the University of Helsinki. With her unique combination of legal acumen and scientific insight, she provides comprehensive guidance for clients seeking success in a rapidly changing marketplace.

Juha-Pekka Mutanen

Partner Juha-Pekka Mutanen advises lenders and borrowers in financing arrangements, market participants in securities law issues and public and private companies in M&A transactions. He acts as Lead Partner in complex finance arrangements, including restructurings and project finance, and advises on M&A transactions, regulatory and securities law matters. He has advised clients in a number of industries including energy and infrastructure, mining, financial services, insurance, health care, consumer products and transportation.

Jan Ollila

Senior Advisor Jan Ollila advises corporate clients, private equity houses and financial institutions on public and private M&A and capital markets transactions and on transaction related disputes. He renders strategic advice to Finnish private and listed companies as well as to a number of international companies with operations in Finland. He also acts as arbitrator and mediator in domestic and cross-border commercial disputes. Jan Ollila is an experienced chairman of boards and general meetings. He is a board member and chairman of a number of companies and organisations, including Amcham Finland, as well as the Vice Chairman of the Supervisory Board of WWF Finland. He is the former President of the Association Européenne d’Etudes Juridiques et Fiscales. He was the Managing Partner of the firm in 2007–2014 and Senior Partner 2015–2022. Jan Ollila has been ranked by Euromoney’s Expert Guides as one of the 30 best M&A lawyers in the world. He recently headed a working group appointed by the Finnish Securities Market Association preparing a reform of the Helsinki Takeover Code.

Aarne Puisto

Aarne Puisto is known for his innovative and solution-oriented approach to solving clients’ legal challenges related to public procurement, competition law and state aid. Moreover, he is regularly involved in administrative court proceedings, EU law related regulatory and compliance assignments as well as in foreign direct investment (FDI) proceedings. He advises clients on both non-contentious and contentious assignments across a wide range of industries, including defence and security, energy, healthcare and pharmaceutical, media, and transport. His prior experience in competition and procurement matters at the Market Court of Finland and the Finnish Competition and Consumer Authority has enriched his understanding of legal processes. This dual insight allows him to anticipate challenges and opportunities in legal strategies, providing clients with a comprehensive approach that enhances their decision-making and strategic planning. Aarne Puisto has acted as counsel in a number of cases before the Market Court and administrative courts. He also has experience in civil and criminal matters related to public procurement before general courts. This expertise is further deepened by his ongoing doctoral research on the effectiveness of legal remedies under Finnish public procurement rules. In addition to his advocacy work, Aarne Puisto is a regular speaker at seminars, universities, and other educational events in Finland and abroad. He keeps himself updated on the rapidly changing case law and regulatory fields by writing articles for domestic and international legal journals. Furthermore, he is a board member of the Finnish Public Procurement Association.

Tuomas Tiensuu

Counsel Tuomas Tiensuu advises international and domestic investors and companies in transactions, investments and projects with a particular focus on real estate, natural resources and energy & infrastructure law. He is known for his outstanding project management skills, commercial acumen and strong commitment to providing exceptional client service. His work is particularly focused on large and complex transactions and projects involving real estate and energy & infrastructure assets. Tuomas Tiensuu regularly advises our clients in both portfolio and large single asset real estate transactions in a variety of asset classes, including commercial, forest, office, logistics, industrial and public use properties. He has an outstanding track record of supporting clients on M&A transactions regarding energy, natural resources, and green transition projects and businesses. Tuomas’ practice also includes general corporate law, regulatory and construction matters beyond transactional advice. Tuomas Tiensuu graduated from the University of Helsinki and holds a LL.M. degree from Columbia Law School, where he was recognised for his superior academic achievement. He has also worked as a visiting lawyer at Hengeler Mueller in Düsseldorf, Germany.

Petteri Uoti

Petteri Uoti has concentrated on labour law since late 1980’s. Since joining Dittmar & Indrenius in 1992, Petteri Uoti has been known both as a trusted advisor and strategic speaking partner to many of the firm’s international and domestic clients in the field of employment law. He has also represented employers in several high-profile landmark cases in general and specialised courts, including the Labour Court, the European Court of Justice, and the Finnish Supreme Court. Petteri Uoti also serves as the Labour Law Professor of Practice at the Law School of the University of Lapland.

Vilho Virmavirta

Vilho Virmavirta advises international and domestic clients on tax structuring, transaction-related tax matters as well as tax disputes, incentive schemes and VAT matters. He also advises clients on M&A transactions as well as general corporate and contract law matters. He has particular experience in the planning and implementation of management participation plans within the private equity sector.

Oscar Wik

Oscar Wik advises on international and domestic tax structuring, other transaction-related tax matters as well as tax disputes. Oscar Wik has broad experience from tax structuring in various types of transactions, including e.g. M&A, private equity, real estate, energy and infrastructure as well as financing and other reorganizations. He also regularly works with corporate tax planning and incentive schemes, as well as advance tax ruling proceedings and tax disputes.