She later collaborated with Christopher Lennertz and Alan Menken, and went on to assist William Ross, Steve Jablonsky, and Pinar Toprak. She also collaborated with composer Ryan Shore and interned at Hans Zimmer's Remote Control Productions. Since early 2016, Dern has frequently partnered up with Klaus Badelt to co-compose music for movies, video games, plays, and theme park rides.
Dern composed music for a variety of productions so far, including The Jade Pendant, Lilly's Bewitched Christmas, Captain Black, Help I Shrunk My Parents, and Wish. Dern also contributed an orchestral arrangement of Chris Braide's title song Back To Earth for the animated movie Trouble as well as several additional arrangements to Warner Bros. female-led reboot Ocean's 8.