Marvin Rosenberg Email to a Friend Teacher:Marvin Rosenberg Biography:Marvin Rosenberg has been an electrician for more than 35 years. After completing his apprenticeship in industrial, commercial, institutional and residential electrical work in 1978, he earned his Red Seal certification. He later earned the title master electrician and also served as a master electrician examiner. Marvin has been teaching since the 1980s and has been working with George Brown College since 1999. In 2002, Marvin was awarded the George Brown College Continuing Education Award for Excellence in Teaching. He has furthered his teaching experience by training other electricians to become instructors themselves and by developing a range of training materials that encourage independent self-study.