Casper Herler

Managing Partner


Managing Partner, Helsinki


Fax. +358 20 713 3499


Pia Puranen
Tel. +358 20 713 3420
[javascript protected email address]

Casper Herler

Casper advises clients on a wide range of issues related to environmental law, natural resources and infrastructure projects as well as corporate responsibility (CSR). He is regularly involved in assessing environmental liabilities in transactions and financing arrangements. One of Casper’s focus areas is strategic advice to clients in particular relating to strategic project planning of large industrial and infrastructure projects as well as social licencing and corporate responsibility issues. Clients also recognise him as the leading Finnish mining lawyer. Trade associations and industrial clients frequently rely on his experience when safeguarding their interests in legislative reforms.

A selection of Casper’s clients include industrial clients, exploration and mining companies, retail firms, various energy and renewable projects, real estate investors, financial institutions, chemical companies and traders as well as trade associations.

Prior to joining Borenius, Casper was a Partner with another law firm. He has also worked at the Ministry of the Environment and teaches environmental law at the University of Helsinki. Casper also has previous experience in legislative work in the field of environmental and mining law and has been a specialist counsel at Pöyry Oyj. He has a doctoral degree in law and has dissertated on soil and groundwater contamination liability.

Casper currently holds the position of a Co-Chair of the International Bar Association’s Mining Law Committee.


Chambers Europe

  • Energy & Natural Resources

Chambers Europe | 2020 & 2021

“Comprehensive in-depth understanding of national and international mining regulations.”


Chambers Europe | 2019

“Deep knowledge of the sector and relevant legislation.


Chambers Europe | 2018
“Great communication skills.” 

The Legal 500

  • Real estate and construction


  • Energy & infrastructure, Project development, Banking, Project finance

IFLR1000 | 2022
“Excellent knowledge of our concerns. Good ability to provide innovative solutions.” 


“Clear and understandable communication, even if the case is not that easy. Casper will find out all crucial matters that might have any impact on the case. He clearly states to the client what the main factors are affecting the outcome and how all risks can be minimised.” 


“A true expert in his field. Easy to discuss legal issues with him.” 

Who’s Who Legal

  • Environment – Global Elite Thought Leader
  • Mining

Who’s Who Legal: Global Elite Thought Leader | 2020

“Highly competent”

Best Lawyers

  • Energy
  • Environment
  • Natural resources

The Lawyer

  • European Managing Partner of the Year 2020

Selected References

  • Advised Freeport-McMoRan Copper & Gold Inc. in a EUR 320 million acquisition of OMG Kokkola Chemicals Oy and its cobalt refinery assets from OM Group, Inc.
  • Advised the Finnish mining industry (FinnMin) in the governmental relations work relating to the preparations of the new Finnish mining act.
  • Advised Nammo Lapua Oy in the acquisition of the Vihtavuori gunpowder factory, which also involved an agreement with the Finnish state concerning environmental issues.


  • Managing Partner, Borenius, 2016–
  • Partner, Borenius, 2010–2016
  • Partner, Hammarström Puhakka Partners, 2009–2010
  • Lawyer, Hammarström Puhakka Partners, 2007–2009
  • Specialist Counsel, Pöyry Environment, 2005–2007
  • Researcher, University of Helsinki, 2002–2007
  • Assistant in Private law, University of Helsinki, 2001–2002
  • Senior Officer, Ministry of the Environment, 2001


  • Bar Admission, 2009, Helsinki, Finland
  • Doctor of Laws, 2008, University of Helsinki, Finland
  • Trained on the bench, 2001, District court of Vaasa, Finland
  • Master of Laws 2000, University of Helsinki, Finland


  • Swedish, Finnish, English, German