Aarne Puisto
Senior Attorney
Aarne Puisto stands out as a very knowledgeable and skilled lawyer. He is a very responsive and solution oriented professional.
– The Legal 500 EMEA 2025, EU and Competition
Very talented, well focused, and super skilled lawyer. I greatly appreciate his wide-ranging expertise and extremely pleasant demeanor.
The Legal 500 EMEA 2024, EU and competition
His exceptional competence in inventing innovative solutions to complex problems is unique in the market.
– The Legal 500 EMEA 2024, EU and competition


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.
Dittmar & Indrenius Attorneys Ltd. (2022–present)
District Court of Helsinki, Trainee Judge (2023)
Market Court of Finland, Market Court Referendary (2021)
Bird & Bird Attorneys, Associate (2020–2022)
University of Lapland (Doctoral Researcher, 2023–)
University of Helsinki (LL.M., 2020)
Lund University (LL.M. in European Business Law, 2019)
• Finnish Bar Association
• Finnish Public Procurement Association, Member of the Board 2023–
• Finnish Competition Law Association
• FIDE Finland
“Tarjoajan poissulkeminen aiemmassa toiminnassa havaittujen epäkohtien vuoksi ja selvitysvastuu korjaavista toimenpiteistä julkisissa hankinnoissa”
– Defensor Legis 4/2021
“Recovering unlawful state aid after recipients’ transfer of business: new developments”
– Europarättslig tidskrift 4/2021
“Kilpailukielto 2020-luvulla: näkökulmia kilpailu-, sopimus- ja työoikeudellisiin rajapintoihin”
– Liikejuridiikka 2/2021
“Kilpailuviranomaisen otto-oikeus eli yrityskaupan jälki-ilmoitusvelvollisuus”
– Defensor Legis 1/2021
“Puitejärjestelyt julkisissa hankinnoissa”
– Defensor Legis 6/2020
”Laittomat suorahankinnat”
– Kilpailuoikeudellinen vuosikirja 2019
“Several courses on EU Law, Competition Law and Public Procurement”
– Guest Lecturer, Lund University, University of Helsinki, University of Turku, University of Lapland, University of Eastern Finland, 2020 –
“Effectiveness of legal remedies under Finnish public procurement rules”
– Speaker, 10th Public Procurement Research Students Conference, University of Nottingham, 2023
“Uhkasakko hankintalainsäädännön tehosteena”
– Speaker, Valtakunnalliset oikeustieteen päivät, University of Tampere, 2023
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