[3][4] He was ordained on May 29, 1999[5] and installed parochial vicar of Our Lady of Lourdes Roman Catholic Church in West Orange, New Jersey,[6] where he served for seven years.

In 2007, Chern was named chaplain and director of the Newman Center at Montclair State University, a position he still holds.

[7] He was named Director of Campus Ministry for the Archdiocese of Newark in 2018 by Cardinal Joseph Tobin.

[9] Chern's radio career began in August 2007 when he appeared as a guest on "The Catholic Guy Show" with Lino Rulli for a segment focusing on prayer.

"[12] In September 2016, after years of being a periodic guest, he was chosen to co-host alongside Rulli, appearing on Thursdays and Fridays.