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Level 3 Network Engineer

VDart

 

San Antonio, TX, USA

Posted On: 30+ days ago
Experience: 5+ years
Availability: Onsite
Openings: 1
Category: Network Engineer
Tenure: Contract - Corp-to-Corp
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Description

Key Responsibilities
1. Technical Operations & Support
Act as L3 escalation point for critical network incidents (P1/P2 issues).
Troubleshoot complex issues across WAN, LAN, SD-WAN, and Wireless networks.
Ensure quick restoration of services (RTS) within SLA targets.
Provide advanced troubleshooting for:
Viptela SD-WAN fabric (Control/Data plane issues)
Cisco LAN switching (VLANs, STP, EtherChannel)
Cisco Wireless (Catalyst 9800 WLC, AP onboarding, policy tags)
WAN circuits and routing instability
 
SD-WAN & WAN Management
Deploy, configure, and troubleshoot Cisco Viptela SD-WAN (vManage, vEdge/cEdge).
Handle: Overlay/underlay routing integration
Policy-based routing & application-aware policies
VPN segmentation and secure connectivity
 
Troubleshoot WAN issues such as:
Packet loss, latency, circuit flaps, routing issues, Routing & Switching Expertise
Strong hands-on experience with: BGP (IBGP/EBGP), OSPF
Route redistribution, route-maps, prefix-lists
 
 
Deep knowledge of: Spanning Tree Protocol (STP), RSTP, BPDU Guard, Root Guard, Loop prevention
Expertise in: VLAN design, inter-VLAN routing, EtherChannel configuration and troubleshooting
Wireless Network (Cisco 9800), Manage and troubleshoot Cisco Catalyst 9800 Wireless Controllers:
WLAN, Policy, Site, and RF profiles, AP provisioning (DHCP Option 43 / DNS)
HA-SSO configuration and failover validation
 
Diagnose wireless issues:
Client connectivity, roaming issues, RF interference, Incident & Problem Management
 
Lead Major Incident Management (MIM) calls and technical bridges.
Drive end-to-end ownership of incidents until closure.
Perform detailed Root Cause Analysis (RCA) and implement permanent fixes.
Ensure compliance with:
 
Proactive Problem Management - Analysis and Identify chronic issues in Network Infra and suggest improvements 
SLA / KPI targets
Incident documentation and reporting standards
 
Change Activities
Support and execute:
Network migrations (LAN/WAN/Wireless/SD-WAN)
Technology upgrades and refreshes
As-built documentation and SOPs
 
Stakeholder & Vendor Management
Coordinate with ISPs, OEM vendors, and internal teams
Provide technical updates to client stakeholders
Participate in client calls, reviews, and audits
 
Tools & Platforms
ServiceNow (or equivalent ITSM tools)
Monitoring tools (SolarWinds, Thousand Eyes – good to have)
Automation knowledge Python/Ansible (good to have)
 
Qualifications & Experience
 
Bachelor’s degree in engineering / computer science (or equivalent)
10–15 years of experience in Enterprise Network Operations
Relevant certifications preferred:
CCNP / CCIE (Routing & Switching / Enterprise)
Cisco Viptela SD-WAN certification

Education

Bachelor's degree

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