While in law school, he completed a summer clerkship with the United States District Court for the District of Massachusetts and performed pro bono legal services for the Boston College Legal Services LAB.

In 2020, Fazzino began working for Cohen and Wolf, P.C., located in Bridgeport.

Fazzino was first elected to public office in 2021 as a town councilor in his hometown of Berlin, Connecticut.

He currently serves as an Assistant Majority Leader and Vice Chair of the Commerce Committee.

In his first term, he focused on legislation concerning public health and small business administration, while also securing state funding to support public safety initiatives, youth-based nonprofits, and local veterans organizations.