[3] At Antioch College, DeMarinis studied film with Paul Sharits, music with John Ronsheim and philosophy with Keith McGary.
[3] At Mills College, DeMarinis studied music composition with Robert Ashley and Terry Riley.
[5] DeMarinis' performance pieces and interactive installations have been featured in international exhibitions and festivals.
He received the 2006 Golden Nica Award for Interactive Art at the Ars Electronica Festival for his installation The Messenger, which examines the myths of electricity in communication.
[11][12] DeMarinis has investigated abandoned technologies and the history of electronic inventions and telecommunications.