As a child, Augustyn discovered his love of comics via DC Comics's Showcase #4 (1956), which featured the first appearance of the Silver Age Flash.
Augustyn got his start in the industry in 1986 as an editor for Tru Studios' Trollords. He then edited Syphons and Speed Racer for NOW Comics in 1987. In 1988, he joined DC, starting out as a co-editor on Action Comics during its period as a weekly title.
During the late 1980s and early 1990s Augustyn was an editor for DC Comics, where he edited The Flash, Justice League and the Impact Comics line of titles.
Augustyn was recognized for his work in the industry with the Wizard Fan Award for Favorite Editor in 1994.
He is currently the managing editor of Visionary Comics Studio.
As editor of The Flash (beginning in 1989), Augustyn brought in Mark Waid as writer in 1992, which led to an acclaimed eight-year run. Under Augustyn's stewardship, the Flash was brought out from the shadow of his predecessors and increased his powers dramatically. Other Augustyn-Waid editor-writer partnerships included The Comet (DC/Impact, 1992) and Impulse (DC, 1995—1996).
As co-writers, Augustyn and Waid scripted The Crusaders for DC/Impact in 1992, Painkiller Jane and Ash: Cinder & Smoke for Event Comics in 1997, X-O Manowar, vol. 2, for Valiant Comics in 1997—1998, and JLA: Year One for DC in 1998—1999. In addition, after leaving as editor in 1996, Augustyn teamed up with Waid to co-write The Flash for two long stretches, from 1996—1997 and then again from 1998—2000.
As a solo writer, Augustyn has worked on such titles as DC's Gotham by Gaslight and its sequel Batman: Master of the Future; Marvel's Imperial Guard; Wildstorm Productions' Out There and Crimson; and Dreamwave Productions's Mega Man.