Tele2
Zeljko Greb is a seasoned VoIP engineer with extensive experience in SIP interconnections and fault searching, currently serving as a Senior VoIP Engineer at Tele2 since December 2015. Prior roles include VoIP Specialist positions at Sinch and Rebtel, where responsibilities encompassed deep SIP fault analysis and expertise in Asterisk and Kamailio. Zeljko also holds a background as a Senior Switch Engineer at AllTele AB and Ventelo, focusing on Nortel GSP technologies, routing, and service setup. Earlier in the career, Zeljko worked as a Switch Engineer at GTS Global Telesystem. Education was completed at the University of Zagreb from 1987 to 1991.
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