Dikker is known for his scores for the films The Fourth Manitoba, Body Parts, and Rosenstraße, among others After training as a classical pianist, Dikker became a jazz musician after seeing a 1959 televised performance by Horace Silver and Sonny Rollins. He gave his first jazz performance in 1960, in a jazz and poetry concert with Godfried Bomans.
He later performed in the bands of Hans Dulfer and Theo Loevendie, and with American instrumentalists Oliver Nelson, Cannonball Adderley, and Don Byas.
In the mid-1970s, he founded his Waterland Ensemble. He wrote his first film score in 1981, and has scored over sixty films.
Jazz Love Cry and Super Nimbus (1970) Tan Tango (1975) Domesticated Doomsday (1978) The Waterland Big Band Is hot! Participant 1 / Participant 2 (1979) Mayhem in our Streets (1980) Summer Suite (1982) Classical To Paul Desmond (1991) Overijssels Volkslied (2000) South Side Ground Zero Boogie Blues (2004).