[3] Zimmerman served in several positions in his native Lancaster County, Pennsylvania, including as chairman of the board of supervisors of East Earl Township.

[2][4] In 2020, Zimmerman was among 26 Pennsylvania House Republicans who called for the reversal of Joe Biden's certification as the winner of Pennsylvania's electoral votes in the 2020 United States presidential election, citing false claims of election irregularities.

[5] In May 2022, GOP leadership removed Zimmerman from all but one of his committees after he supported a primary challenger running against state Senator Ryan Aument.

[6][7] In a speech on September 24, 2022, in support of Doug Mastriano, Zimmerman told the crowd he had received a subpoena from the FBI regarding the January 6 United States Capitol attack, claiming that "the FBI looked for me all day long, but what I did that they didn't know is, I turned my phone tracker off.

"[8] Zimmerman resides in East Earl Township, Lancaster County, Pennsylvania, with his wife, Ruth Ann.