Network L3 Engineer
First seen by Alion on Oct 9, 2026.
Key Responsibilities :
- Install, configure and maintain network and security equipment and services.
- Troubleshoot LAN, WAN, firewall and VPN connectivity issues.
- Document network problems, troubleshooting activities and resolutions.
- Proactively monitor network availability, performance and security.
- Log, track and own network and connectivity-related issues through resolution.
- Provide design and implementation support for new network projects.
- Create technical specifications and support RFP requirements.
- Independently engage customers for network connectivity setup and related activities.
- Coordinate with customers, service providers and vendor support engineers.
- Work with vendor TAC teams for troubleshooting and root-cause analysis.
- Maintain network device connectivity across data-center and bank-side environments.
Must-Have Technical Skills :
- Strong understanding of OSI model, Ethernet, NAT, IP addressing and TCP/IP.
- Practical experience in TCP/IP network implementation and administration.
- Hands-on experience with advanced IPS/IDS/UTM technologies.
- Minimum 3 years of Data Center networking experience.
- BGP is mandatory, along with OSPF, HSRP and VRRP.
- Hands-on experience with at least one of Juniper, Cisco, Check Point or Fortinet firewalls.
- Experience with ACI-SDN and Radware.
- Strong knowledge of STP, VLAN, SVI and LACP.
- Experience with SD-WAN, particularly FortiGate and Aruba.
- Knowledge of GRE, P-VPN, P-NAT, P-Routing and firewall clustering.
- Strong understanding of TCP/UDP and IPv6.
- Experience with IOS upgrades.
- Knowledge of RADIUS and TACACS/TACACS+.
- Experience with NMS, SYSLOG and SNMP.
- Basic understanding of FTP server communication.
Equipment & Hands-On Experience :
- 4 - 5 years of hands-on experience with network switches such as Juniper, Cisco, Mellanox, Dell and/or Arista.
- Hands-on experience with Cisco routers and enterprise network infrastructure.
- Experience with Cisco ASA, Juniper, Check Point and/or Fortinet firewalls.
- Practical knowledge of network cabling, racks and data-center infrastructure.
- Experience with network monitoring tools and network analyzers.
- Ability to troubleshoot and differentiate network, application and system-level issues.
Professional Skills :
- Strong troubleshooting and problem-solving skills.
- Ability to prioritize multiple network and connectivity issues effectively.
- Ability to work independently and take ownership of technical issues.
- Strong communication and stakeholder-management skills.
- Overall experience : 8 - 10 years in networking/network infrastructure.
Skills
Network Administration, BGP, TCP/IP, OSI Model, Firewall, Cisco, VLAN, IPv6, IT Infrastructure, SDWAN