Isaac graduated from the University of Tasmania with a Bachelors of Arts and Law in 2016 before completing practical legal training the following year. After being admitted to the Supreme Court of Tasmania, Isaac returned to Launceston to practice for another local firm for four years before having a period working in local government. He commenced with Douglas and Collins in October 2021.

Isaac has a general commercial practice and advises on a variety of matters, including commercial and residential conveyancing, leases, business sales/acquisitions and estate planning.

Isaac is involved in the local rugby union community, acting as a president and player for the Launceston Rugby Club before taking on the role of president of the Tasmanian Rugby Union in 2024.