Senior Network Administrator - L3

Role overview

Senior Network Administrator - L3 at In Time Tec Visionsoft

Design, configure, manage, and troubleshoot enterprise LAN/WAN infrastructure.

Responsibilities

• Strong Layer 2 and Layer 3 troubleshooting capabilities.
• Configure and troubleshoot VLANs, trunking, STP/RSTP/MSTP, LACP/EtherChannel, inter-VLAN routing, ACLs, QoS, HSRP/VRRP .
• Strong understanding of OSPF, BGP, EIGRP, and Static Routing .
• Troubleshoot routing loops, packet loss, latency, route flapping, and connectivity issues.
• Analyze routing tables, ARP/MAC tables, STP topology, and network traffic.
• Hands-on experience with Cisco, Aruba, or equivalent enterprise networking platforms .
• Configure, manage, and troubleshoot enterprise firewalls.
• Hands-on experience with Fortinet, Palo Alto, Cisco ASA/Firepower, or equivalent .
• Configure and troubleshoot security policies, NAT/PAT, ACLs, application control, web filtering, IPS/IDS, SSL inspection, traffic shaping, and HA .
• Troubleshoot firewall-related connectivity and security issues.
• Perform firewall configuration backup, restoration, upgrades, and basic hardening.
• Implement network segmentation and security best practices.
• Configure, manage, and troubleshoot enterprise wireless infrastructure.
• Configure SSIDs, VLAN mapping, guest Wi-Fi, captive portal, WPA2/WPA3, 802.1X, RADIUS, and roaming .
• Troubleshoot wireless authentication, connectivity, coverage, interference, and performance issues.
• Network Troubleshooting & Operations Act as an L3 escalation point for complex network incidents.
• Perform structured troubleshooting and identify root cause.
• Troubleshoot LAN, WAN, routing, switching, firewall, VPN, wireless, Internet, and network security issues.
• Use tools such as Wireshark, Ping, Traceroute, Nslookup/Dig, packet capture, and vendor CLI .
• Analyze network logs, alerts, and traffic flows.
• Perform Root Cause Analysis (RCA) for major incidents.
• Identify recurring problems and recommend permanent solutions.
• Monitor network availability, performance, bandwidth, latency, errors, and packet drops.
• Work with network monitoring and management platforms.
• Technical Skills TCP/IP | IPv4/IPv6 | Subnetting | VLAN | Trunking | STP/RSTP/MSTP | LACP | HSRP/VRRP | ACL | QoS | OSPF | BGP | EIGRP | Static Routing | Fortinet | Palo Alto | Cisco ASA | NAT | Security Policies | IPS/IDS | Application Control | Web Filtering | SSL Inspection | Traffic Shaping | Network Segmentation | HA | IPSec | Site-to-Site VPN | SSL VPN | Aruba | Cisco | Ruckus | Fortinet | VLAN Mapping | 802.1X | RADIUS | WPA2/WPA3 | Captive Portal | Roaming | DNS | DHCP | DHCP Relay | FQDN | NTP | RADIUS | TACACS+ Qualifications Bachelor's degree in computer science, Information Technology, Electronics & Communication, Computer Engineering, or a related technical field, or equivalent industry experience.

Required qualifications

• 6+ Years |

Preferred qualifications and skills

• Preferred Certifications CCNA CCNP Enterprise Fortinet FCP / relevant Fortinet certification Palo Alto certification

Employment details

• Employment Type: Full-Time | Level: Senior / L3 Position Summary We are looking for an experienced Senior Network Engineer with 7+ years of hands-on experience in enterprise networking.
• Candidate will be responsible for designing, implementing, managing, monitoring, and troubleshooting enterprise network infrastructure.
• The role requires strong practical knowledge of routing, switching, firewalls, wireless, VPN, WAN, network security, and network troubleshooting .
• The candidate should be capable of independently handling complex incidents, network changes, upgrades, and infrastructure projects while providing technical guidance to junior engineers.
• Location: Jaipur, Bangalore

Additional role details

• Senior Network Administrator - L3