Sr. Network Operations Center (NOC) Engineer - (Tier 3)
Position Summary The Senior-Level NOC Engineer (Tier 3) functions as the highest technical escalation point within the global Network Operations Center. This role provides advanced troubleshooting, architecture-level insight, and deep subject matter expertise across complex, multi-vendor network infrastructures. Tier 3 support engineers lead root-cause analysis, oversee major incidents, influence network design standards, and partner with engineering teams to drive stability, scalability, and operational excellence.
Key Responsibilities Advanced Incident & Problem Management
- Acts as the final escalation point for all high-severity incidents, providing advanced packet analysis, protocol decoding, and cross-platform correlation.
- Performs deep-dive RCA, producing engineering-quality post-incident documentation and recommending long-term corrective actions.
- Leads network recovery efforts during outages involving routing instability, security events, hardware failures, or cloud connectivity issues.
Architecture-Level Network Expertise - Expert proficiency with Cisco IOS, Nexus OS, ACI, and Juniper Junos, with the ability to interpret and troubleshoot complex multi-tier architectures.
- Designs and validates routing topologies, including large-scale enterprise BGP and OSPF deployments, multi-homing, route reflectors, graceful restart, fast reroute, and policy-based routing.
- Deep understanding of F5 LTM/GTM, load-balancing behaviors, DNS architectures, and SSL offloading.
Security, Cloud, & Advanced Platforms - Expert-level support for Cisco ASA, Palo Alto NGFW, IPSec architecture, segmentation policies, and security posture validation.
- Advanced experience with AWS Direct Connect, cloud routing, hybrid architectures, and troubleshooting cloud edge connectivity.
- Leads analysis of Wi-Fi performance across Aruba WLANs, RF tuning, interference mitigation, and controller-based troubleshooting.
Tools, Automation & Visibility - Mastery of packet analysis tools: Solarwinds, APCON, Wireshark, netflow/sflow platforms.
- Develops automation scripts for configuration validation, monitoring, and incident response workflows.
- Evaluates and integrates new operational tools and observability platforms.
Cross-Functional Leadership - Partners with Network Engineering to validate new designs, perform pre-deployment testing, and influence standards.
- Mentors junior and mid-level NOC engineers, providing technical coaching, lab guidance, and training material.
- Engages directly with vendors for escalated TAC cases, hardware escalations, and architectural reviews.
Qualifications and Skills - Minimum 5 years of experience in network administration, including advanced troubleshooting, network design, and implementation.
- Bachelor's degree (B.E./B.Tech in Computer Science, IT, Electronics & Communication) or MCA, or equivalent practical experience.
CCNA, CCNP, or CCDP certifications preferred. - Extensive enterprise network operations and engineering experience, supporting large-scale, complex environments, with exposure to Tier 3 escalations and high-availability architectures.
- Expertise in routing, switching, and WAN technologies, including:
- Advanced BGP, OSPF, and VRF design and operations
- MPLS fundamentals, L2/L3 architectures, and enterprise WAN solutions
- Load balancing and resilient network design
- Strong network security expertise, including:
- Firewalls, VPNs, IDS/IPS
- Hands-on experience with security-centric platforms and policy-driven architectures
- Cloud networking experience across AWS, Microsoft Azure, and Google Cloud Platform, including hybrid connectivity and cloud-integrated network designs.
- Proficiency in troubleshooting and diagnostics, including:
- PCAP analysis, deep packet inspection, and root-cause analysis
- Advanced troubleshooting across routing, switching, security, and cloud networks
- Hands-on experience with leading networking and security platforms, including:
- Cisco, Juniper, Brocade, Aruba, Palo Alto, and F5 ecosystems
- Proficiency with network monitoring and operations tools, such as:
- SolarWinds, Wireshark, and enterprise Operations Monitoring platforms
- Automation and scripting capabilities using Python and PowerShell to improve network efficiency, reliability, and operational scale.
- ITSM and workflow tool experience, including ServiceNow and Jira, supporting incident, problem, change, and escalation management.
- Strong operational leadership skills, including the ability to:
- Lead and coordinate major incidents under pressure
- Provide clear, effective communication during outages and escalations
- Drive resolution across cross-functional technical teams
- Participation in 24x7 Tier 3 escalation rotation, including support for after-hours change execution and major network event coverage as required.
- Excellent problem-solving, communication, and collaboration skills, with proven ability to manage complex network issues, escalations, and operational monitoring responsibilities.
Preferred Skills: Cloud networking experience across AWS, Microsoft Azure, and Google Cloud Platform, including hybrid connectivity and cloud-integrated network designs.
Special Factors Sponsorship Vanguard is not offering visa sponsorship for this position.
About Vanguard At Vanguard, we don't just have a mission-we're on a mission.
To work for the long-term financial wellbeing of our clients. To lead through product and services that transform our clients' lives. To learn and develop our skills as individuals and as a team. From Malvern to Melbourne, our mission drives us forward and inspires us to be our best.
How We Work Vanguard has implemented a hybrid working model for the majority of our crew members, designed to capture the benefits of enhanced flexibility while enabling in-person learning, collaboration, and connection. We believe our mission-driven and highly collaborative culture is a critical enabler to support long-term client outcomes and enrich the employee experience.
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