Lead Network Security Engineer

We are seeking an experienced Enterprise Wireless & Network Operations Consultant to support and enhance our network infrastructure. This role is responsible for ensuring the stability, security, and performance of enterprise network services through proactive monitoring, rapid incident response, and structured change management practices.

The consultant will operate across both operations (L2) and advanced engineering (L3) functions, collaborating with internal teams and external vendors to deliver high-quality network services.

Key Responsibilities

Tier 2: Network Operations & Monitoring

Manage end-to-end incident lifecycle using ServiceNow, including intake, categorization, prioritization, and tracking.

Perform real-time monitoring of network infrastructure (Juniper EX/QFX switches, Palo Alto firewalls) using SNMP and Syslog.

Execute standard service requests such as port provisioning, VLAN configuration, and wireless guest access support.

Ensure timely escalation of incidents to Tier 2 teams or OEM vendors (Juniper JTAC, Palo Alto TAC) in line with SLAs.

Tier 3: Advanced Network Engineering

Troubleshoot and resolve complex Layer 2/Layer 3 issues, including:

Virtual Chassis (VC) failures

Spanning Tree Protocol (STP) loops

OSPF/BGP routing issues

Manage network security operations, including:

Palo Alto firewall policies (Security/NAT)

IPsec VPN tunnel stability and performance

Optimize and support enterprise wireless environments, including controller configurations and client connectivity issues.

Perform network lifecycle management, including firmware upgrades and patching (Junos OS, PAN-OS).

Design, document, and implement Change Requests (CRs) in ServiceNow with detailed testing and rollback plans.

Required Technical Skills

Switching: Juniper EX & QFX Series, Junos OS

Security: Palo Alto Firewalls (PA-Series), Panorama

Wireless: Enterprise WLAN (Mist, Aruba), 802.1X authentication

SDWAN - Silverpeak

ITSM Tools: ServiceNow (Incident, Change, Request Management)

Networking Protocols & Services: DNS, DHCP, IPAM, SNMP, BGP, OSPF, LACP

Service Level Expectations

Respond to critical incidents (P1) within 15 minutes; target resolution within 4 hours

Respond to high-priority incidents (P2) within 30 minutes; target resolution within 8 hours

Ensure timely patching compliance for all critical security updates

Maintain 100% adherence to change management processes, including documentation and approvals

Key Deliverables

Develop and maintain Standard Operating Procedures (SOPs) for operational tasks

Provide monthly operational reports covering ticket trends, SLA performance, and network availability

Maintain a quarterly patching and upgrade roadmap for all network infrastructure

Preferred Qualifications

Strong experience in enterprise network operations and wireless environments

Hands-on expertise with Juniper and Palo Alto technologies

Proven ability to work within SLA-driven environments

troubleshooting, documentation, and communication skills