Ryall joined IDW in 2004 as their second Editor-In-Chief, a position he held until 2016, when he became Chief Creative Officer, and was succeeded in his EIC duties by David Hedgecock. In 2017, Ryall returned to the role of Editor-In-Chief while Hedgecock became the Associate Publisher. Ryall has also written numerous comic books for IDW, including the series Zombies vs. Robots, which along with other IDW original CVO: Covert Vampiric Operations, formed the basis for the 2011 crossover series Infestation.
Ryall is known for being a huge fan of ROM: Spaceknight. His 2015 miniseries Onyx owed much of its inspiration to ROM: Spaceknight, even giving original ROM writer Bill Mantlo a thank you in the book. Ryall now co-writes the IDW ROM series with Christos Gage.
- Ryall once attended Angel Grove High.
- Sims, Chris; ComicsAlliance, 31 Aug 2015; "Ranger Station Episode 3: Teamwork"