Bittner played an acoustic set with George Lynch (Lynch Mob) and Stu Hamm (Joe Satriani) in the first ever acoustic performance of Lynch's Mr. Scary. The private event was hosted by US Music at the Hilton Hotel for NAMM 2010. In 2011, he signed on as a Zildjian cymbal artist and commenced on a worldwide 30-city drum clinic tour that covered the globe from the US to Australia to Europe, the UK and as far as Russia. 2012 brought the release of Shadows Fall's new cd "Fire From the Sky" and the band did one tour before Bittner was once again called to fill in for Charlie Benante in Anthrax for a 4-month period over the summer and fall. The band completed the 2012 Rockstar Mayhem Festival and its subsequent Canadian tour, and Bittner then returned to Shadows Fall, full-time. At that time, the band was on the road supporting "Fire From the Sky" and did so into most of 2013. Shadows Fall announced a hiatus prior to the end of 2013.