Meijer is a notary in Amsterdam and the Vice-President of the European Affairs Commission of the International Union of Notaries. 

He has been a member of various boards at Stichting Vrienden van Felix Meritis, Stichting Bibliotheca Philosophica Hermetica and also of the Supervisory Board of Stichting Geef om Cultuur. Mr Meijer is also a member of the Advisory Board of Patiëntenvereniging NSvG and the Executive Board of Stichting Willen is Kunnen.