Creator, Maker, Builder, Hacker
- co-founder of hackerspaces Hack42 and AwesomeSpace, helped with a lot more hacker community stuff in the Netherlands
- Leading roles in conferences such as SHA2017, OHM2013, Hacker Hotel and more.
- Security tester / architect
- Ethical hacker
http://elgerjonker.nl for more info.
Lot's of (semantic) mediawiki experience. For e.g. Hack42 (projects, activities, usermentions and such), OHM2013 and tons of smaller (wikipimping) contributions. Not all of them reachable over the interwebs.