Derek Sietses > ENVIR Advocaten > Amsterdam, Netherlands > Lawyer Profile

ENVIR Advocaten
Jan van Goyenkade 10 III
1075 HP Amsterdam

Work Department

Environmental law, administrative law, governmental liability, including contract liability matters, nature conservation law


Derek Sietses is a partner of ENVIR Advocaten. Derek’s expertise covers administrative law, including environmental law, EHS matters and nature conservation law, as well as civil law, including contract liability matters.

Derek has extensive experience in complex, politically sensitive cases, both representing local authorities, including municipalities, provinces and enforcement agencies, and companies and developers. In particular, Derek assists both government bodies and developers in various projects on questions relating to contracting, permitting, civil law aspects and municipal taxes. Furthermore, Derek specialises in the negotiation and drafting of contracts.


2019-today Partner at ENVIR Advocaten
2017-2019 Lawyer at TRIP Law
2013-2017 Lawyer at Stibbe Amsterdam


Dutch, English


2014-2015 Law Firm School
2012-2013 Master of Laws in Public Law and Civil Law, University of Groningen, Groningen
2009-2012 Bachelor of Laws, University of Groningen, Groningen