On April 30, 2012, it was announced on the website of progressive rock artist Neal Morse that Simmons would be the new drummer for Morse's American touring band. However, a few weeks later, Morse announced that Simmons cancelled due to family issues.
Simmons started playing the drums at an early age, playing with his brothers Mike (guitar) and Jamie (bass) in several cover bands.
On June 12, 2004, he joined the three original members of Petra in a set in which they performed an entire set of songs from the 1970s.
In 2005, he participated in the recording of the band's last live album, Petra Farewell. At one time of the show, Bob Hartman broke a string and Simmons delivered an impromptu drum solo. Unfortunately, being a spontaneous thing, the crew didn't get a good take of it so it wasn't included in the album or the DVD.