- Very good level of SIP, IMS/NGIN experience.- Profound knowledge with mobile network. SS7 / Sigtran.- Voip projects- Understanding of IP routing protocols.- Experience on delivery support of new products- Experience in network integration projects.- Excellent communication skills.- Strong analytical mentality/conceptual way of thinking; Flexible and stress-resistant.- Ability to work on client´s job site.- Experience in multicultural and multisite Project environment.- Self-motivation.- Cultural sensitivity.- Good negotiation skills. - English (Fluent written and spoken)-