In 1789, he was invited to become the physician of the Moravian community in the Wachovia Tract, in North Carolina, which was established around twenty years earlier.

He was received into the Moravian church by the congregation of Zeist, Netherlands, in September 1789, then sailed to American shores the following month.

[1] Vierling remarried, the same year, to Martha Elizabeth Miksch, step-granddaughter of bishop Augustus Gottlieb Spangenberg.

They had three sons (August Ernst, Friedrich Benjamin and Theophilus) and five daughters (Henriette Friederika, Carolina Juliana, Johanna Eleonora, Theodora Amalia and Eliza Wilhemina).

[1] In 1802, Vierling had a home built, by Johann Gottlob Krause,[3] on Church Street in Salem.