Gregg was the host of WRTI's morning drive show from 2012 until his retirement from WRTI in January, 2021. He began producing and hosting The Philadelphia Orchestra In Concert broadcasts in 2013, joining the Orchestra in Hong Kong for the first-ever live international radio broadcasts from that island in 2016, and in Tel Aviv and Jerusalem for two historic broadcasts in 2018. You can still hear Gregg as host of the Orchestra broadcasts every Sunday and Monday on WRTI.
Before arriving in Philadelphia, Gregg was the national voice of live broadcasts of the New York Philharmonic, and produced and hosted intermission features at The Metropolitan Opera, while hosting the morning show at WQXR in NYC for many years.
Gregg also narrated the PBS special Pavarotti and the Italian Tenor, Classic Views video magazine, the feature film Royal Kalibur, and the documentary Montserrat Caballe, Beyond Music.
Gregg hosted live, national 9/11 tributes from Riverside Cathedral in New York, and Manhattan’s Pierpont Morgan Library, along with F. Murray Abraham and George Plimpton.
In addition to Hong Kong, Tel Aviv and Jerusalem, Gregg has produced and hosted live broadcasts abroad from London, Venice, Vienna, Hamburg, and Haifa.