From 1960 to 1965, Pat Andrea studied at the Royal Academy of Art, The Hague, where he was a student of the painter Co Westerik.

Along with Walter Nobbe and Peter Blokhuis, he founded the ABN Group (from their initials: A ndrea, B lokhuis, N obbe ).

In 1977, Jean Clair invited him to participate in the exhibition La nouvelle subjectivité in the Paris Fall Festival, along with Jim Dine, David Hockney, R. B. Kitaj, Raymond Mason, and Olivier O. Olivier.

He traveled to Latin America and settled in Buenos Aires, where he remained for several years.

From June to September 2007 he presented 48 paintings illustrating the works of Lewis Carroll at the Château de Chenonceau.