How whould you call my job ?

[Hanan Cohen]

Here is what I do at the library.

System Administrator
Webmaster / Web designer
Information retrieval specialist
Computer usage instructor

How is my job called ?
What should I add after my name at my e-mail signature ? (see below)

Thanks

-- 
Hanan Cohen

Qiriat-Gat Central Library http://www.qglibrary.org.il
Kibbutz Tamuz - Beit Shemesh http://www.tamuz.org.il
***Love and Peace***