Geertjan is Technical Writer who works for Netbeans.
I found out he visited El-Menoufiya University from his blog:
He already gave NetBeans presentations there, and would be happy to give more.
He will be in Egypt until Jan 17th
Anyone her would like to arrange for him to give some NetBeans talks in Cairo, say at "Sakiat El Sawy" or any other suitable place.
Ohh, and he is a Groovy and Grails advocate, so maybe we an get him to speak about these technologies too, actually I got to know him from his blogs that got posted on the groovyblogs.org aggregator site.