Born in the Netherlands, Marjolein Bruinen taught and directed a school for secondary education there, before entering her congregation in Aruba in 1975. Later she ministered in Germany and Italy, helping direct the congregation's children's villages. Called to Riga, Latvia, she established a community of the congregation there. After the Latvian sisters were able to take over its leadership and a short sabbatical, she served in the Generalate, in the Netherlands, as a member and then secretary of the General Board, for 12 years. In those years she was also involved in actions against human trafficking. Currently she is the general secretary of the Union of the European Conferences of Major Superiors.