Role Overview:
As an L3 Network Administrator, you will be responsible for the design, implementation,
administration, and advanced troubleshooting of enterprise network infrastructure. This
includes LAN, WAN, WLAN, firewalls, load balancers, and VPN solutions across data
centers and branch offices. The role requires deep technical expertise, handling
escalations from L1/L2 teams, and ensuring network availability, performance, and
security.
Key Responsibilities:
• Provide L3 operational support for routers, switches, firewalls, load balancers, and
wireless infrastructure.
• Manage and configure Cisco, Juniper, Arista, Palo Alto, Fortinet, F5 (or equivalent
platforms).
• Implement and maintain routing protocols (BGP, OSPF, EIGRP, MPLS) and VLANs.
• Troubleshoot complex network performance, latency, and packet loss issues.
• Administer firewall policies, VPNs (IPSec, SSL), and remote access solutions.
• Manage WAN optimization, QoS, and bandwidth monitoring.
• Perform firmware/IOS upgrades, patching, and hardware lifecycle management.
• Support network security initiatives including NAC, IDS/IPS, and DDoS protection.
• Monitor and analyze network health using tools like SolarWinds, PRTG, Nagios,
Cisco DNA Center, Wireshark.
• Document network topology, runbooks, and change requests in line with ITIL
practices.
• Participate in on-call rotation and provide RCA for high-severity incidents.
• Collaborate with cloud and server teams for hybrid/cloud networking (AWS,
Azure, GCP).
Required Skills & Experience:
• 6–10+ years of experience in enterprise network administration.
• Expertise in routing, switching, and firewall administration (Cisco, Juniper, Palo
Alto, Fortinet, etc.).
• Strong understanding of TCP/IP, DNS, DHCP, NAT, VLANs, STP, HSRP/VRRP.
• Experience with VPNs, MPLS, SD-WAN, and wireless networks.
• Familiarity with firewall rules, ACLs, and network security best practices.
• Proficiency in packet capture and analysis (Wireshark, tcpdump).
• Knowledge of network automation (Python, Ansible, Cisco DNA/ACI) is a plus.
• Exposure to cloud networking (VPCs, VPN gateways, load balancers).
• Willing to work in rotational shift (shift & cab allowances are provided).
• Prefer male candidates only.
Preferred Qualifications:
• Cisco Certified Network Professional (CCNP) or higher (CCIE) strongly preferred.
• Palo Alto, Fortinet, or F5 certifications (PCNSE, NSE, F5-CA) are a plus.
• Experience in multi-vendor network environments.
• Knowledge of Zero Trust and SDN solutions (Cisco ACI, VMware NSX, etc.)
About ZL Technologies
ZL offers today’s leading organizations the ability to comprehensively manage the entirety of their digital assets. One seamless and scalable solution can manage billions of documents and other unstructured data from a consolidated point of control.
The ZL Tech platform leverages a unified architecture that enables large enterprise organizations to solve the challenges of compliance, privacy, e-discovery, and records management, while harnessing their data for enterprise analytics and AI.
ZL Tech is an Equal Opportunity Employer and does not discriminate against any employee or applicant for employment because of race, color, sex, age, national origin, religion, sexual orientation, gender identity and/or expression, status as a veteran, and basis of disability or any other federal, state or local protected class.
Top Skills
What We Do
Based in the heart of Silicon Valley, ZL Tech is the industry leader in information governance for large enterprises.
The ZL Tech platform leverages a unified architecture that enables organizations to solve the challenges of compliance, privacy, e-Discovery, and records management, while harnessing their data for strategic advantage.
As a Gartner Leader and the longest standing vendor in the Magic Quadrant for Enterprise Information Archiving, ZL Tech has 22 years experience serving the Fortune 500 and beyond.
