Keizersgracht 451-1V
1017 DK Amsterdam
T +31 20 737 20 66
F +31 20 796 92 22

Derek Sietses

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 contracts 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 wind and solar projects on questions relating to contracting, permitting, civil law aspects and municipal taxes.

Derek Sietses linkedin

Romkeslaan 59
8933 AR

T +31 20 236 10 24
M +31 6 1588 6936
F +31 20 796 92 22

Derek is practical and efficient and brings a strategic and commercial approach to the table when assisting his clients. He is therefore well-placed to help his clients successfully navigate the complex legal context in which they operate.

Prior to joining ENVIR Advocaten in 2019, Derek worked for Stibbe Amsterdam in the administrative law and litigation department and at Trip Advocaten en Notarissen in Leeuwarden in the administrative law department. Derek regularly publishes in Dutch scientific and professional journals and gives lectures on various legal topics for a wide range of audiences. Derek heads ENVIR Advocaten’s Leeuwarden office.

The ENVIR Advocaten team provides ‘truly high standards and more than value for money’.

Legal 500 – EMEA 2019

The team is appreciated for its ‘direct communication and knowledge of zoning plans in Amsterdam’.

Chambers, 2019

‘They really listen to you and take a broader look at all aspects.’ The lawyers are ‘practical and solution-driven’.

Chambers, 2019

The ENVIR Advocaten team is appreciated for its ‘highly qualified specialists who are very easy to work with’.

Legal 500 – EMEA 2019