Senior Lead Network Engineer

Role overview

Senior Lead Network Engineer at Infinite Computer Solutions

Deploy and configure Cisco Unified Communications Manager (CUCM), Unity Connection, UCCE, UCCX, CUBE, and SIP trunking.

Responsibilities

• Implement voice gateways, dial plans, QoS policies, and session border controllers (SBCs).
• Integrate Microsoft Teams, Zoom Phone, or other cloud-based telephony solutions.
• Troubleshooting & Support (L2/L3):
• Resolve call routing issues, codec mismatches, latency, jitter, and packet loss in VoIP networks.
• Debug SIP, H.323, MGCP, and RTP/RTCP protocols using Wireshark, SIP, or other tools.
• Provide L3 escalation support for voice-related incidents and outages.
• Monitoring & Optimization:
• Monitor voice quality metrics (MOS, Jitter, Latency) using tools like SolarWinds, Cisco Prime, or IR Prognosis.
• Optimize QoS policies for voice traffic prioritization.
• Perform capacity planning and upgrades for VoIP infrastructure.
• Security & Compliance:
• Implement voice security measures (TLS, SRTP, firewall policies for VoIP).
• Ensure compliance with PCI-DSS, HIPAA, or other regulatory standards (if applicable).
• Collaboration & Documentation:
• Work with network, security, and cloud teams for cross-functional projects.
• Maintain network diagrams, SOPs, and change management records.
• Provide 24/7 network and security support as required.
• Mandatory
• Cisco UC Suite (CUCM, CUC, UCCX, CUBE, IMP)
• SIP, H.323, MGCP, RTP/RTCP protocols
• Voice Gateway Configuration (ISDN, PRI, FXO/FXS, SIP Trunking)
• QoS for Voice (DSCP, LLQ, AutoQoS)
• Experience with Cisco Jabber, Webex, and MRA deployments.
• Troubleshooting with Wireshark, RTMT, etc.
• Webex, Contact Center
• Session Border Controllers (AudioCodes, Oracle SBC, Cisco CUBE)
• Basic Networking (VLANs, Routing, Firewall ACLs for VoIP)
• Manage UCS Server with patching
• Strong understanding of network infrastructure, design, and troubleshooting.
• Excellent communication skills in English (both verbal and written).
• Ability to work efficiently in a team-oriented environment with high self-motivation.
• A customer-focused mindset with strong delivery service ethics.
• Good understanding of Monitoring tools such as SolarWinds, Grafana, Prometheus, etc.
• Willingness to work in a 24/7 support window.
• Good understanding of the ITSM processes.

Required qualifications

• 10 to 12 years
• Bachelors degree in computer science, Telecommunications, or related field.

Employment details

• Location: Bangalore - Campus

Additional role details

• Job Title: Senior Lead Voice Engineer
• Skills: QoS, Cisco Unified Communications, SIP Protocol, Wireshark, Solarwinds/Manage Engine, Voice Over IP (VoIP), Cisco Webex, Cisco Routers,
• Certification
• CCNA Voice/CCNP Collaboration (Must)
• Avaya, Genesys, or other VoIP certifications
• ITIL Foundation