He was a Liberal member of the Legislative Assembly of Ontario from 2003 to 2018 who represented the Toronto riding of Scarborough Southwest.

On October 25, 2010, Berardinetti's then-wife Michelle won election as a Toronto City Councillor.

In the provincial election of 2003, Berardinetti defeated incumbent Progressive Conservative Dan Newman by about 6,000 votes in Scarborough Southwest.

[7] During his time in the government, Berardinetti was a Parliamentary Assistant to the Minister of Labour (2010-2011) and PA to the Attorney General (2011–2018).

He moved in with his brother in Ajax, Ontario in 2022 but left in 2023 after an argument over money and has lived in homeless shelters since then.

[1] After news of his situation broke, he was able to raise over $25,000 from former colleagues across all parties, including his Progressive Conservative predecessor and New Democratic successor as MPP, Dan Newman and Doly Begum.