in Biology from Moravian College, was named senior scholar athlete of the year and won the Tubby Campbell Award for dedication and sportsmanship in wrestling.

The United States Conference of Mayors later invited Callahan back to Harvard Kennedy School to speak about transitioning from political campaigning to governing.

John Tallarico, owner of Bethlehem's Linden Food Market, worked as Callahan's campaign chairman.

[5] Callahan was known for his charming behavior with residents, but also had a reputation for pushing strongly behind the scenes for issues he supported, and sometimes responding in an abrasive way to opponents.

"[5] Early in his term, Callahan vetoed a schedule to fund a $7.39 million bond to cover a federal civil rights suit.

[5] Six years after Callahan took office, developers had invested $2 billion in Bethlehem, creating more than 5,000 jobs, and violent crime in the city dropped by 25 percent.

Callahan made his record in Bethlehem a focal point on his campaign, positioning himself as knowledgeable about how to rejuvenate an economy, a central issue in the 2010 mid-term elections.

[10] Callahan was a member of the 300 person transition team for incoming Governor Josh Shapiro in 2022, serving on the Business Development Subcommittee.

During his congressional campaign, Callahan said he spent more time at the houses of friends than his own home, and credited his wrestling coaches and other community members for keeping his life on a positive track.