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.
Positive verbal and written communication.
Ability to work in shifts and handle critical incidents.
Customer-focused mindset.

Certifications:CCNP security,F5 201

📌 Opening ForDNS (Mumbai)
🏢 Sify
📍 Mumbai