I'm the author of the popular online guides:
- How to Fix a Hacked Joomla Website (http://www.bluebridgedev.com/joomla-hacked)
- Speed Up Joomla (http://www.bluebridgedev.com/speed-up-joomla)
- Joomla Best Practices Checklist (http://www.bluebridgedev.com/joomla-checklist)
I also write on business for the freelance web developer on my blog at Knight Errant (knighterrant.co)
I've contributed to the Joomla project as a bug squasher, JUG leader, JCM author, and extension developer.