I started using Drupal to build and maintain several transportation-related websites for a part time job in college. We were using 4.7 with an Oracle database (which required patching every module we used).
Information security has always interested me, which drove me to obtain a Masters of Science in Digital Forensics. Sometime later I joined the Drupal Security Team.
In 2011 I started working at Acquia in the Professional Services department, where I provided consulting to clients of various sizes. I've since moved to focus specifically on security and performance. These days most of my time is spent testing client's applications to ensure they are fast and secure.