Wireless Network Engineer

2 weeks ago

Delhi, Delhi, India Tata Consultancy Services Full time

Role Wireless Network Engineer

experience 5+ years

location delhi ncr hyderabad

jd

Job Summary:

We are seeking a highly experienced Level 3 Wireless Network Engineer with deep expertise in both Cisco and Aruba wireless technologies. The ideal candidate will lead the design, deployment, troubleshooting, and optimization of enterprise-grade wireless infrastructures. You will act as a subject matter expert (SME), resolving high-level wireless issues and driving continuous improvements in performance, scalability, and security.

Key Responsibilities:

  • Design and deploy large-scale wireless LAN (WLAN) environments using Cisco WLCs and Aruba (Mobility Controllers, Instant APs, Central).
  • Optimize channel planning, band steering, and power level adjustments to reduce interference and maximize coverage.
  • Architect and implement high-availability wireless designs, including N+1 controller redundancy, LAGs, VRRP/HA groups.
  • Administer Cisco WLCs (9800) and Aruba Mobility Controllers (MM/MC architecture).
  • Configure WLANs, SSIDs, AAA policies, and AP groups with role-based access control (RBAC).
  • Implement Fast Roaming (802.11r/k/v), bandwidth throttling, application visibility, and WIPS/WIDS.
  • Manage firmware upgrades, controller failovers, and AP image preloading strategies.
  • Integrate with RADIUS servers (ISE, forescout) for 802.1X authentication.
  • Configure Guest access portals, MAC-based authentication, and Captive Portals (internal and external).
  • Analyze wireless packet captures using Wireshark, or Aruba AirWave/Central.
  • Resolve L2/L3 roaming issues, high latency, client disconnections, and interference problems.
  • Monitor KPIs like SNR, RSSI, retransmission rates, and throughput to identify RF anomalies.
  • Correlate client issues using Aruba Central

Required Skills & Experience:

  • 5+ years of experience in enterprise wireless networking.
  • Strong hands-on expertise in both Cisco and Aruba wireless ecosystems.
  • Proficiency with:
  • Cisco Wireless LAN Controllers (9800 Series, AireOS, Catalyst APs)
  • Aruba Controllers, Instant APs, Aruba Central, AirWave
  • Wireless security protocols: WPA2/WPA3, 802.1X, PSK, MAC auth
  • Authentication systems: Cisco ISE
  • RF tuning, mesh networks, client load balancing, high-density deployment
  • Strong understanding of Layer 2/3 networking, VLANs, Multicast, QoS, and DHCP relay.
  • Comfortable with CLI (Cisco IOS/XE, Aruba OS) and web-based UIs.
  • Experience with cloud-managed wireless solutions (Aruba Central, Cisco Meraki is a plus).
  • Familiarity with Wi-Fi 6 and Wi-Fi 6E features and limitations.

Preferred Certifications:

  • Cisco Certified Specialist – Enterprise Wireless
  • Aruba Certified Mobility Professional (ACMP)

Soft Skills:

  • Strong analytical and troubleshooting skills.
  • Excellent documentation and communication abilities.
  • Proven leadership in high-severity incidents and RCA investigations.
  • Capable of mentoring L1/L2 engineers and leading knowledge transfer sessions.
  • Ability to manage multiple priorities and work independently.

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