(1981) began his studies with Albert van der Hoeven and Jolanda Zwoferink, and went on to study with Ben van Oosten. In 2004 he obtained his degree as Performing Musician (phase 1) with a registration for improvisation at the Brabant Conservatory at Tilburg, where Bram Beekman and Henco de Berg were his teachers. He also completed a specialization in chamber music, and had performance lessons from Ad van Sleuwen. He graduated with distinction for phase 2 as Performing Musician at the Brabant Conservatory (main subjects: organ and improvisation) in 2006, with Bram Beekman and Henco de Berg respectively. He also takes private improvisation lessons from Ansgar Wallenhorst and Naji Hakim and lessons on works by Vierne and Tournemire from Ben van Oosten. Courses were taken from Loic Maille, Theo BrandmÃ¼ller and others. Gerben Mourik assisted in fifteen CD recordings, paying much attention not only to organ literature but to Dutch compositions, sometimes in collaboration with other instrumentalists. He also cooperated in the DVD Improvisata, recorded in the Martini church at Bolsward. As organist, he worked in Rotterdam (1998 - 2000) and Klundert (2000 - 2006) and since 1 July 2006 he is organist of St Michael's church in Oudewater.
Gerben took part in several organ improvisation contests, getting an honourable mention in the B.A.C.H. contest at Amersfoort (2003) and winning first prize at the National Organ Improvisation Contest at Zwolle (2003). He was among the finalists of the International Organ Contest at Haarlem (2004) and won first prize in the international organ improvisation contest at St Albans, UK. He makes regular appearances as an accompanist of choirs and as such assisted Vocal Devotion, a choir led by Coen Ruivenkamp, in performing several large choir works in transcriptions for organ and piano, with pianist Caecilia Boschman. In June 2005 he collaborated with the same pianist in a CD featuring César Franck's Variations Symponiques and three works by Arie J. Keijzer. In 2005 his first publication of sheet music "three psalm improvisations" was brought out by Cantique in Rijssen, who also published his second volume, Psalmenpalet (2006) and the third, Cantique (2007).
In addition to these activities he works as an international concert organist, giving recitals in places including Düsseldorf and Rheede (Germany, 2005), Liverpool (England, 2006), Bergamo (Italy, 2006) and the cathedrals of Salisbury and Gloucester (England, 2007). In 2007 he also taught a master class and gave a recital in New York. In 2008 he was the winner of the International Improvisation Contest in Haarlem.