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 and administration.

After growing up in Launceston, Isaac has been involved in local sport since his return to the city, including acting as president for the Launceston Rugby Union Club since 2018, being appointed to the board of the Tasmanian Rugby Union and refereeing for the Launceston Touch Association.