He was a Liberal Party of Australia member of the Western Australian Legislative Council from 1956 to 1965, representing Metropolitan Province.
[1][2] He was promoted to inspecting accountant in the Treasury Department on 19 March 1940, but enlisted for service in World War II with the Perth-based 5th Anti-Aircraft Battery on 30 January 1942.
[1][3] Mattiske was involved in establishing the Building Industry Congress of Western Australia in 1945 and became its organising director.
He also became a life member of the South Perth Cricket Club in 1947, and was appointed a justice of the peace in 1954.
Mattiske died at Sir Charles Gairdner Hospital in 1992 and was buried at Karrakatta Cemetery.