A leading IT services provider that works with key sectors such as the financial industry is currently seeking a Cisco Voice L3 Engineer. The organization is an international financial services group, with in excess of 202,000 employees with solid roots in Europe, a significant and growing presence in the Americas as well as a solid and fast-growing business in Asia-Pacific. Voice Team provides technical support to clients, respond to their requests promptly by prioritizing and allocating them, monitor and resolve voice issues, configure, implement, and provide support for VoIP installations whenever the need arises, evaluate wiring problems and fix them, assess and state solutions for voice communication issues, plan and suggest systems management software and hardware. Key Responsibilities: Design, build, implement, upgrade, and troubleshoot Cisco Voice and Collaboration environments, with strong focus on SBC and CUCM. Lead end-to-end deployment of Cisco UC platforms, including CUCM cluster builds from scratch , full dial plan configuration, and system upgrades. Deploy and support Cisco Jabber over MRA , including SSO authentication . Provide advanced SIP troubleshooting , including header-level analysis. Ensure high availability, performance, and SLA compliance of voice infrastructure. Implement and monitor security policies , standards, and technical documentation. Perform advanced incident diagnosis, root cause analysis , and resolution using logs and packet captures. Support and manage incidents through ServiceNow . Deliver technical support and lifecycle management for Cisco Unified Communications technologies. Support PBX integrations and migrations with third-party systems. Manage and troubleshoot voice gateways and protocols (MGCP, SIP, H.323, SCCP, PRI/E1, FXO/FXS). Coordinate with Cisco TAC to resolve complex technical issues in enterprise environments. Professional Skills, Abilities and Experience: Strong organizational skills with the ability to multi-task 5 to 7 years experience working in IT infrastructure environments. Team and collaborative working to develop and deliver appropriate solutions skills. Experience of delivering strategic priorities within strict timelines. Customer service-oriented skills. Knowledge of different VoIP protocols (SIP, H323, RTP, MGCP) Experience on large voice infrastructure (mainly Cisco integrated with third parties)Large experience on voice troubleshooting (Translator X, Wireshark, RTMT.) Desirable expertise: Knowledge of different recording environments (NICE, IPC, VERBA) Deep knowledge of Voice Oracle Infrastructure (SBC, ECB) Languages & Qualifications: High English spoken and written fluent QUALIFICATIONS: Industry Certifications desired: Cisco, Nice/Verba, Oracle, Alcatel Others: On Site Services: From 7:30 to 19:30 schedule to cover in weekly shifts of 8 working hours/dayOn Call Services: Out of regular schedule, we provide On Call services 24/7 to be covered in weekly shifts by team members