Senior Network Engineer - Infra, Data Center & Fabric - Juniper

Role and Responsibilities

• Monitor and administer enterprise LAN/WAN, data center, and wireless environments (Nexus, Catalyst, ASA/Firepower, SD WAN).

• Triage, troubleshoot, and resolve L1–L3 network incidents and performance issues; escalate to vendors as needed.

• Manage IP addressing, VLANs, trunking, Ether

Channel/Port Channel, VPC, and routing adjacencies (OSPF/BGP/EIGRP).

• Maintain and optimize Cisco Nexus switching (e.g., 5K/7K/9K), including VPC, HSRP/VRRP, fabric modules, and FEX.

• Support firewall rule changes, NAT, site to site and remote access VPNs; collaborate with security on policy enforcement.

• Ensure network monitoring, alerting, and logging are operational (e.g., Solar

Winds, Logic

Monitor, Thousand

Eyes, Net

Flow).

• Provide on call support within a rotation and support scheduled after hours changes.

• Plan and execute network changes (migrations, upgrades, code/firmware updates, new site turn ups).

• Implement redundancy and high availability: VPC/MLAG, routing protocol tuning, first hop redundancy, SD WAN HA.

• Contribute to network segmentation and Zero Trust initiatives (ACLs, VRFs, micro segmentation).

• Participate in cloud connectivity projects (Express

Route/Direct Connect, Cloud NAT, VPN to AWS/Azure/GCP).

• Automate routine tasks using Ansible/Python, templating, and configuration standards where appropriate.

• Maintain platform documentation, SOPs, knowledge articles, and architectural diagrams.

Must Have

• Platforms: Cisco Nexus (5K/7K/9K), Catalyst (9K/3K), ASA/FTD, Wireless controllers (optional).

• OS & Infra: Solid understanding of DNS/DHCP/NTP/IPAM; basic Linux/Windows networking.

• Documentation: Visio/draw.io; strong written/runbook skills.

• SD WAN: Cisco Viptela or Meraki SD WAN.

• Automation & Scripting: Ansible, Python, Git, CI/CD for network changes, Infrastructure as Code basics.

• SRE Practices: SLO/SLI for network services, synthetic monitoring, telemetry.

• Strong analytical and problem-solving abilities.

• Ability to lead technical discussions and mentor junior engineers.

• Strong documentation and diagramming skills (Visio, Lucidchart, Draw.io).

Education

• Minimum BS/BA degree or equivalent experience.

• Minimum 10 years of progressive experience in infrastructure/network architecture, implementation, troubleshooting, and support.

Certifications:

• CCNA (required or equivalent experience)

• CCNP Enterprise or CCNP Data Center (strong plus)

• ITIL Foundation (plus)