Opening For L2 DNS Networking at Mumbai

Sify; Mumbai; On-site; INR 1,500,000 - 2,100,000; Full time

Job summary

Sify in Mumbai seeks an experienced L2 DNS Engineer to manage and troubleshoot our enterprise DNS infrastructure with a focus on F5 DNS/GTM. You will handle incident management, change implementation, and collaborate with cross-functional teams to maintain high-availability DNS services.

Candidates should be adept at network fundamentals and packet analysis, capable of working in shifts, and committed to maintaining runbooks and SOPs for seamless operations.

Qualifications

• Strong understanding of DNS architecture and recursive resolution.
• Experience with BIND or enterprise DNS platforms.
• Hands-on with F5 DNS/GTM and related features.
• Proficient in troubleshooting DNS and network issues.
• Ability to work in shifts and handle critical incidents.

Responsibilities

• Monitor and manage enterprise DNS infrastructure.
• Troubleshoot DNS resolution issues, delegation problems, zone transfer issues, and DNSSEC-related incidents.
• Configure and manage F5 DNS/GTM Wide IPs, Pools, Topology Load Balancing, iRules, and DNS listeners.
• Perform DNS record management (A, AAAA, CNAME, MX, TXT, SRV, PTR).
• Manage DNS zones and zone transfers.
• Troubleshoot network connectivity issues using TCP/IP fundamentals.
• Analyze packet captures using Wireshark and tcpdump.
• Perform health monitoring and failover testing for DNS services.
• Handle incidents, service requests, problem management, and change implementation.
• Coordinate with application, server, security, and network teams for issue resolution.
• Maintain operational documentation, runbooks, and SOPs.
• Participate in on‑call support and major incident management.

Skills

DNS

F5 GTM

Networking

Troubleshooting

Shift Work

Incident Management

Education

CCNP Security; F5 201

Tools

Wireshark

tcpdump

nslookup

dig

traceroute

ping

Job description

Location

Mumbai

Role Summary

We are looking for an experienced L2 DNS Engineer responsible for managing, troubleshooting, and supporting enterprise DNS infrastructure with a strong focus on F5 DNS (GTM), networking, and DNS operations. The candidate will provide operational support, incident management, problem resolution, and change implementation for business-critical DNS services.

Key Responsibilities

• Monitor and manage enterprise DNS infrastructure.
• Troubleshoot DNS resolution issues, delegation problems, zone transfer issues, and DNSSEC-related incidents.
• Configure and manage F5 DNS/GTM Wide IPs, Pools, Topology Load Balancing, iRules, and DNS listeners.
• Perform DNS record management (A, AAAA, CNAME, MX, TXT, SRV, PTR).
• Manage DNS zones and zone transfers.
• Troubleshoot network connectivity issues using TCP/IP fundamentals.
• Analyze packet captures using Wireshark and tcpdump.
• Perform health monitoring and failover testing for DNS services.
• Handle incidents, service requests, problem management, and change implementation.
• Coordinate with application, server, security, and network teams for issue resolution.
• Maintain operational documentation, runbooks, and SOPs.
• Participate in on‑call support and major incident management.

Required Skills

• DNS
  • Strong understanding of DNS architecture and protocols.
  • DNS query flow and recursive resolution.
  • Forward and Reverse DNS.
  • Zone delegation and zone transfers.
  • DNS troubleshooting and performance analysis.
  • Experience with BIND or enterprise DNS platforms.
• F5
  • Hands‑on experience with F5 DNS/GTM.
  • Knowledge of Wide IPs, Pools and Pool Members, iRules, DNS Listeners, Data Centers and Servers, Monitors, Topology Load Balancing, GSLB synchronization, DNS Express.
  • Experience in F5 LTM administration is preferred.
• Networking
  • Strong knowledge of TCP/IP, OSI Model, Routing and Switching, VLANs, NAT, Load Balancing, HTTP/HTTPS, SSL/TLS, Firewalls.
• Troubleshooting Tools
  • Wireshark, tcpdump, nslookup, dig, traceroute, ping.
• Soft Skills
  • Strong troubleshooting and analytical skills.
  • Good verbal and written communication.
  • Ability to work in shifts and handle critical incidents.
  • Customer‑focused mindset.
• Certifications
  • CCNP Security, F5 201.