Guevara-Moreño was born in Valencia, Venezuela in 1926. He lived in Paris from 1950 until 1955 and participated in the Dissidents group. He became a member of MADI and was awarded several important prizes. He was a three time first place winner in the Nacional de Pintura, Dibujo y Grabado in Venezuela. Guevara created optical effects in his coplanals, thereby making diagonal lines appear to be zig-zags. Vasarely later used the same technique on a monumental scale.