First, check out his profile from comicbookdb.com.  There, the story ends in the 70’s.

Where I pick it up is in the 80’s, when the artist knocked out several posters for  21st Century Distribution and Almi Picures, companies that specialized in importing and “Americanizing” many European and Asian genre films.

His signature only appears on one poster (Eye of the Evil Dead aka Lucio Fulci's Manhattan Baby) but there are a few technical, thematic, and composition elements that all point in the same direction.  

Here are some examples of his non-movie poster work: