He has done production work and songwriting for The Cab , The Veronicas , Good Charlotte , Mest , The Used , Story of the Year , Ashlee Simpson , ONE OK ROCK , Hilary Duff , Goldfinger , Showoff , The Matches , Atreyu , City Sleeps , Anthony Green , Cute Is What We Aim For , Escape the Fate , Foxy Shazam , All Time Low , Allstar Weekend , Panic !
John Feldmann has produced for the artist Beat Union .