Senior Network Administrator

Title:

Experience:

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Skills Required:

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Qualification:

We at Coforge are seeking a “Senior Network Administrator" with strong expertise in Routing & Switching and hands-on experience with enterprise firewalls. The candidate will be responsible for designing, implementing, managing, and troubleshooting network infrastructure, ensuring secure and reliable connectivity across enterprise environments.

Key Responsibilities

1. Routing & Switching Administration

• Configure and manage Cisco Layer 2 and Layer 3 switches.
• Create, modify, and troubleshoot VLANs.
• Configure Access and Trunk ports.
• Implement and troubleshoot Inter-VLAN Routing.
• Configure and manage VTP, STP, RSTP, and MSTP.
• Configure EtherChannel (LACP/PAgP).
• Configure Port Security and MAC Address Filtering.
• Configure SVI and Management IPs.
• Implement High Availability using HSRP and VRRP.
• Monitor and troubleshoot interface errors, CRC drops, packet loss, and network instability.
• Perform IOS upgrades and configuration backups.

2. Router Administration

• Configure and manage Cisco ISR/ASR Routers.
• Implement Static and Dynamic Routing.
• Configure and troubleshoot:
• OSPF
• BGP
• EIGRP
• RIP
• Route Redistribution between protocols.
• Configure ACLs, Prefix Lists, and Route Maps.
• Implement NAT and PAT.
• Configure IPsec VPN tunnels.
• Manage WAN and ISP connectivity.
• Troubleshoot routing and connectivity issues.

3. Firewall Administration (Mandatory)

• Hands-on experience with any enterprise firewall such as:
• Palo Alto
• Fortinet FortiGate
• Cisco Firepower/ASA
• Check Point
• Sophos
• Configure and manage Firewall Policies, NAT, and Security Rules.
• Configure Site-to-Site VPN and Remote Access VPN.
• Troubleshoot VPN, NAT, and Security Policy issues.
• Monitor firewall logs and investigate security incidents.
• Perform firewall upgrades, patching, and backup activities.
• Optimize firewall performance and security posture.
• Implement URL Filtering, IPS/IDS, Application Control, and Threat Prevention features.

4. Network Troubleshooting

• Perform end-to-end network troubleshooting.
• Analyze routing tables, ARP tables, and traffic flows.
• Troubleshoot VLAN mismatches, trunk issues, and STP loops.
• Identify packet drops, latency, and bandwidth bottlenecks.
• Perform packet captures using Wireshark or equivalent tools.
• Troubleshoot OSPF and BGP neighbor establishment issues.
• Support critical incidents and root cause analysis (RCA).

5. Monitoring & Network Services

• Manage TCP/IP, DNS, DHCP.
• Configure and monitor SNMP, Syslog, and NTP.
• Utilize network monitoring tools for proactive issue detection.
• Create operational documentation and SOPs.
• Coordinate with vendors and internal stakeholders for issue resolution.

Required Skills

• Cisco Catalyst Switches
• Cisco Nexus 9000 Series
• Cisco ISR/ASR Routers
• OSPF, BGP, EIGRP, RIP
• HSRP, VRRP
• VLANs, STP, RSTP, MSTP
• ACLs, Route Maps, Prefix Lists
• NAT, PAT, IPsec VPN
• TCP/IP, DNS, DHCP
• SNMP, Syslog, NTP
• Enterprise Firewall Administration (Palo Alto/Fortinet/Cisco Firepower/ASA/Check Point/Sophos)

Preferred Qualifications

• CCNA / CCNP Certification preferred.
• Firewall certifications such as PCNSA/PCNSE, NSE4/NSE5, CCNP Security preferred.
• Experience in enterprise or data center network environments.
• Strong troubleshooting and leadership skills.