L3 Network Engineer - Voice/VoIP Subject Matter Expert

About the role

Madre Integrated Engineering is hiring an L3 Network Engineer in Doha to act as the Voice/VoIP subject matter expert. The role covers escalation support, installation, configuration, troubleshooting and maintenance of ISDN PRI and SIP CPEs, voice gateways, ESBCs and their management platforms, plus lead technical projects and after-hours on-call support.

Key responsibilities

• Escalate L3 issues and act as the Voice/VoIP subject matter expert
• Install, configure, troubleshoot and maintain ISDN PRI and SIP CPEs, voice gateways, ESBCs and their NMS/EMS platforms
• Lead technical projects for new systems and upgrades, including POCs, interoperability testing and integrations with third-party communication platforms
• Work with backend teams, vendors and IT to resolve customer issues, manage vendor relationships and SLAs
• Perform scheduled maintenance, tuning and firmware security checks, following Incident and Change Management processes and documenting support procedures for audit
• Support capital budget planning (BOM/BOQ) and cost optimization, and provide after-hours on-call support

Required profile

• Bachelor's degree in Computer Science, Electronics & Telecommunication or IT
• CCIE / CCNP Collaboration certification (mandatory)
• 7+ years supporting Cisco IPT or similar platforms such as UCCE/UCCX, voice gateways, ESBCs, Cisco HCS and vCenter/vSphere
• Strong knowledge of ISDN PRI, E1/T1, SIP, VoIP, H.323 and RTP, with hands-on experience with Ribbon and Nuera ESBCs/gateways and Teams Direct Routing
• Deep-dive troubleshooting using SIP captures, call traces and CDRs, plus knowledge of dial plans, trunks, DIDs and call routing
• Basic Linux (RHEL/CentOS), ITIL and Project Management knowledge; contact center experience is an advantage