Since childhood Marien has been fascinated by ships. In 2004 he completed studies as a shipbuilding engineer and then as a structural / building engineer. He became a follower of Christ in 2015 after reading Ephesians 2: 8-9. A year later he read an article in a Christian magazine about port missions and started visiting ships in 2017 as a volunteer.
The port of Amsterdam is a seaport in Amsterdam in North Holland, Netherlands. It is the fourth busiest port in Europe by metric tonnes of cargo. The port is located on the bank of a former bay named the IJ and the North Sea Canal, with which it is connected to the North Sea.