[1] After completing college, he met his future wife, Cynthia, and they worked overseas, teaching English in Oman.

[2] From 1999 to 2008, Zimmerman was rector of St. Francis-in-the-Fields Episcopal Church in Somerset, Pennsylvania, growing it from a 30-member congregation to nearly 100 in Sunday attendance and debt-free status for the first time in its history.

Eighty percent of St. Francis' members followed him, and the new congregation, called Somerset Anglican Fellowship, left its building and began meeting at a local mall.

[4] In 2016, Zimmerman joined fellow ACNA Bishops Eric Menees, Keith Andrews, Kevin Bond Allen, and Todd Hunter to streamline the ordination process in western U.S. ACNA dioceses, with a joint exam and a joint examining board that would allow clergy ordained under the standards to serve in any participating diocese.

[6] In 2020, Zimmerman began winding down his episcopal duties after accepting a call to serve for a two-year period as a half-time bishop-in-residence and interim rector at Christ Church Phoenix in the Diocese of Western Anglicans.