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Senior Network Engineer

Job in Deerfield, Lake County, Illinois, 60063, USA
Listing for: Tata Consultancy Services
Full Time position
Listed on 2026-05-06
Job specializations:
  • IT/Tech
    Cybersecurity, Systems Engineer
Salary/Wage Range or Industry Benchmark: 120000 - 140000 USD Yearly USD 120000.00 140000.00 YEAR
Job Description & How to Apply Below

Must Have Technical/Functional Skills

  • 7+ years of network engineering experience in large enterprise environments (global WAN, multi‑site data centre, 10,000+ endpoints).
  • 3+ years of hands‑on Azure networking experience:
    Virtual WAN, Express Route, Azure Firewall, NSGs, Private Endpoints, and Azure DNS.
  • Expert‑level knowledge of routing protocols: BGP (eBGP/iBGP), OSPF, EIGRP, and IS‑IS in enterprise and service provider contexts.
  • Deep expertise in enterprise switching:
    Spanning Tree variants (RSTP/MSTP), VLAN architecture, VxLAN/EVPN in data‑centre fabrics.
  • Hands‑on experience with enterprise firewall platforms:
    Palo Alto PAN‑OS (required), Fortinet Forti

    OS, or Cisco FTD/ASA.
  • CCNP Enterprise or CCNP Security (active) required; CCIE preferred.
  • Experience with enterprise network automation:
    Python (Netmiko/NAPALM/Nornir), Ansible, or Terraform (azurerm networking resources).
Required/Preferred Certifications
  • CCNP Enterprise (Required)
  • AZ‑700 (Highly Desirable)
  • Palo Alto PCNSE
  • CCIE (Preferred)
  • Fortinet NSE 4+
Roles & Responsibilities Enterprise Azure Network Architecture & Operations
  • Design and operate enterprise Azure network architecture:
    Azure Virtual WAN hub‑and‑spoke topology connecting 20+ Azure subscriptions, on‑premises data centres, and branch offices globally.
  • Manage and optimise Express Route circuits (10

    Gbps+) including BGP routing policy, route filtering, and failover to Site‑to‑Site VPN backup paths.
  • Own Azure Firewall Premium policy management across all Azure regions; implement IDPS signatures, TLS inspection, and URL filtering aligned to enterprise security policy.
  • Design and maintain Azure Private DNS Zone architecture integrated with on‑premises DNS resolvers (Conditional Forwarders / Azure DNS Private Resolver).
  • Implement and govern Private Endpoint and Private Link strategy for all PaaS services (Azure SQL, Storage, Key Vault, AKS API Server, etc.) to eliminate public exposure.
On‑Premises & WAN Infrastructure
  • Configure, manage, and optimise enterprise routing and switching infrastructure across Cisco Catalyst/Nexus, Juniper EX/QFX, and Arista platforms in Tier 3+ data centres.
  • Administer BGP peering with upstream ISPs and Azure Express Route; manage AS path manipulation, route redistribution and traffic engineering policies.
  • Design and operate SD‑WAN overlay (Cisco Catalyst SD‑WAN / VMware Velo Cloud) for 200+ branch sites, including policy‑based routing and application‑aware path selection.
  • Manage enterprise network security perimeter:
    Palo Alto PA‑Series (on‑premises), Fortinet Forti Gate (branch), and Cisco ISE for 802.1X NAC and segmentation.
Security, Zero Trust & Network Segmentation
  • Lead implementation of Zero Trust Network Access (ZTNA) architecture using Microsoft Entra Private Access and Entra Internet Access as part of the enterprise SASE strategy.
  • Design and maintain macro and micro‑segmentation strategies using VLANs, VRFs, NSGs, Azure Firewall Policy rule collections, and AKS network policies (Calico/Cilium).
  • Conduct periodic network security reviews and vulnerability assessments; remediate findings from penetration testing and threat intelligence feeds within agreed SLA.
  • Collaborate with the SOC and Cyber Security teams to investigate network‑based threats and support forensic analysis of network traffic using Azure Network Watcher and NSG Flow Logs.
Monitoring, Capacity & Governance
  • Operate and enhance network monitoring using Azure Network Performance Monitor, Log Analytics, Thousand Eyes, and Solar Winds NPM for end‑to‑end visibility across hybrid estate.
  • Lead capacity planning for WAN circuits, Azure VNet address spaces, and data centre switching fabrics; present quarterly capacity reviews to the Head of Infrastructure.
TCS Employee Benefits Summary
  • Discretionary Annual Incentive
  • Comprehensive Medical Coverage:
    Medical & Health, Dental & Vision, Disability Planning & Insurance, Pet Insurance Plans
  • Family Support:
    Maternal & Parental Leaves
  • Insurance Options:
    Auto & Home Insurance, Identity Theft Protection
  • Convenience & Professional Growth:
    Commuter Benefits & Certification & Training Reimbursement
  • Time Off:
    Vacation, Time Off, Sick Leave & Holidays
  • Legal & Financial Assistance:
    Legal Assistance, 401K Plan, Performance Bonus, College Fund, Student Loan Refinancing
Salary Range

$120,000 - $140,000 a year

#J-18808-Ljbffr
Position Requirements
10+ Years work experience
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