Joseph is a Lawyer and runs his own practice in Penrith called Joseph Grassi + Associates
Penrith is home for Joseph and his family, and he has a keen interest in the area and a desire to see it prosper. Joseph was a member of the Sydney West Area Health Service Research and Ethics Committee, a member of the AustLaw executive, a Director of Syd-West Personnel Pty. Limited and Vice-President of the Penrith Valley Chamber of Commerce Inc.
In 2011 Joseph was appointed to the Nepean Blue Mountains Local Health District Board and he was the chair of the Finance and Performance Committee of the Local Health District.
Joseph’s tenure on the Board concluded on 30 June 2021. That did not stop his involvement with the Local Health District as he established the Nepean Blue Mountains Education and Medical Research Foundation Limited known as the Nepean Foundation of which he is the Chair.