
Van Doorne ‘combines deep sector-specific knowledge with broad experience’ on landmark energy transition projects. Practice co-head Léone Klapwijk assists on project development, licensing, and contractual matters within the power generation, electricity supply, and carbon transition spaces. Diederik Maessen, who also co-leads the team, is a key contact on the development of hydrogen and carbon capture projects, as well as the acquisition and disposal of battery storage assets. Victor van Ahee offers ’unparalleled’ regulatory knowledge, demonstrating particular engagement with low-carbon power and fuel projects. Ellis Martens supports on electricity sector regulation and contracts.
\nTestimonials
Collated independently by Legal 500 research team.
- 'Van Doorne strikes the perfect balance between a reputable, traditional knowledge base and the innovative mindset needed in today’s world.'
- 'The team is highly responsive and quick to react with practical advice. A pleasure to work with and knowledgeable in the complex field we are operating in.'
- 'Léone Klapwijk, Victor Van Ahee and Diederik Maessen lead the team by example. They have a constructive, get-the-deal-done mentality.
- 'Léone Klapwijk is a very dedicated and intelligent lawyer and very keen to serve and defend the interests of her clients, combined with diplomatic persuasive skills to get to an agreement with others.'
- 'Diederik Maessen goes through a burning fire for his clients, identifying both legal and economical risks and solutions.'
- 'Victor van Ahee has an unparalleled knowledge of regulatory frameworks.'
Key clients
- Vopak
- Gasunie
- Shell International B.V.
- TotalEnergies
- Port of Rotterdam
- EBN
- Ingka
- Vattenfall AB
- EemsEnergy LNG Terminal
- Gate LNG Terminal
- LyondellBasell
- Eneco
Work highlights
Lawyers
Next Generation Partners
Junior partners with significant recognition from clients and peers in the market and key roles on multiple matters.

Leading associates
Leading associates with regular involvement in their team's key work, and recognition from peers or clients as being ones to watch.
Ellis Martens
Practice head
Léone Klapwijk; Diederik Maessen
Other key lawyers
Victor van Ahee; Ellis Martens
