Jon Knox is an American session drummer[1] who has been a member of the bands White Heart, Adam Again, Future User, Full on the Mouth, and is currently the drummer for The Union of Sinners and Saints.

[3] He reunited with White Heart in 2006 for the Soul2Soul Awards show[4] and again in 2014 for the Easterfest concert in Australia.

[citation needed] The Union features members from two best-selling Christian Rock bands, Petra and White Heart.

[citation needed] Jon is responsible for helping form Rage Against the Machine[6] and when bassist, Tim Commerford started a side project in 2013, he tapped his longtime friend, Knox to play drums for his electronic progressive rock outfit Future User for their debut release.

The band is composed of bassist, Commerford, along with multi-instrumentalist Jordan Tarlow on keys and production and Brendan O'Brien on guitars.