While at Tufts, Fattman received a Public Policy Summer Fellowship from the Rappaport Institute for Greater Boston of Harvard University.

In 2006, while a student at Suffolk, Fattman launched his political career by announcing his candidacy for the Sutton Board of Selectman.

During Fattman's tenure, he was credited with the restoration of Marion's Camp, a public beach in Sutton, senior citizen property tax relief, town capital stabilization, and improved cell phone coverage.

In 2014, Fattman was elected to the Massachusetts State Senate, becoming the first Republican to hold the Worcester and Norfolk district seat since 1938.

[8] A request by Fattman and the other plaintiffs to block Sullivan from providing evidence to the Massachusetts Attorney General was denied on March 30.