Ronaldus Shamask (born November 24, 1945) is an American fashion designer.
Ronaldus Shamask was born in Amsterdam, Netherlands and raised in Australia.
He started his professional career a window display designer in Melbourne (1963–1966).
He went on to become a fashion illustrator for The Times and The Observer in London, England from 1967 to 1968.
From 1968 to 1971 Shamask was a theatrical designer for the Company of Man performance group in Buffalo, New York.