Justin is heavily involved with the FOSS community contributing to Bootstrap, Font Awesome, Grunt, jQuery, Twemoji, Nginx, GNU Bash, and many more. He also serves on the Selection Committee for Mozilla’s Open Source Support (MOSS) program, as well as the Open Source Collective’s board of directors. In 2017, he co-founded/organized Sustain Summit, an annual one-day event for Open Source Software Sustainers.