He might look kinda tough but in fact he is a nice guy. Say hi when you run into him. Van der Greft has been a security agent for several years and he has experience with events on a large scale. This Ploneconf has been a walk in the park so far.
With some bad experience at other conferences when a laptop got lost, the decision was made to call in security just to be on the safe side. "With this crowd I don't anticipate any trouble" he said. Consider me your host at entrance. If people have questions or when safety is at risk, I can help out.
The Ploneconf may not pose a safety risk, but Harro does make long hours these days. Especially today is going to be a little tough, but he is up for the job. "I am used to long shifts so that's no problem for me. When you all had a good time without problems, my job is done."