Maayke Maas-Cooymans

Attorney at law, partner

Maayke graduated from Utrecht University in 1997. She gained work experience during successive spells with Trenité Van Doorne, De Brauw Blackstone Westbroek and Simmons & Simmons, before joining Ploum as a lawyer and partner in 2008.

Maayke Maas-Cooymans advises clients on enforcement and spatial planning issues and also acts on environmental impact assessments and permitting. She assists with criminal cases in the area. A source says: “She is reliable and has a solid understanding of her subject matter.” – Chambers 2019


Maayke is active in the fields of environmental licensing law, spatial planning law (Spatial Planning Act, Housing Act, etc.) and environmental law in the broadest sense (IPPC, waste, reach, Environmental Impact Assessment procedures, environmental reporting, environmental permit procedures and enforcement, general administrative procedure and constitutional law (including freedom of government information). She is a member of Ploum’s energy rights team. In addition, she regularly publishes and edits various administrative and environmental law publications for Sdu and Euroforum, respectively. Maayke is a member of the NOVA Administrative Procedure working group. Finally, she teaches for Erasmus University Rotterdam, the vocational training programme in Law, OSR Utrecht, Sdu Opleidingen and delivers advocacy training and in-house courses. In Chambers 2014 Maayke is mentioned: “Maayke Maas-Cooymans of Ploum specialises in planning and environmental law, with a focus on the energy sector.”

In April 2012 Ploum was awarded as ‘Environmental Law Firm of the Year 2012’ in the Netherlands by Corporate INTL legal awards.