Senior Tier 3 Network Engineer — Onsite in DC (DOE/Q)

Zachary Piper, LLC; Washington (District of Columbia); On-site; USD 165,000 - 175,000; Full time

Benefits offered by this job

Medical, Dental, Vision

401(k)

PTO & Paid Holidays

Job summary

Zachary Piper Solutions is seeking a Tier 3 Network Engineer to support enterprise network infrastructure in Washington, DC. The role involves designing, configuring, maintaining, and troubleshooting complex Cisco, Palo Alto, and F5 environments onsite.

The candidate must hold an active DOE Q or Top Secret clearance and have hands-on experience with TACLANE encryption, GTM/BIG-IP DNS, VPNs, and secure networking. This position is onsite in Washington, DC for federal program work.

Qualifications

• Active DOE Q or Top Secret clearance is required.
• Hands-on Cisco routing and switching experience (IOS/NX-OS).
• Experience with Palo Alto NGFW and VPN technologies.
• Experience with TACLANE encryption devices and cryptographic networking.
• Hands-on F5 load balancers (GTM, BIG-IP DNS).
• Strong understanding of subnetting, Layer 2/3, and enterprise LAN/WAN.
• Proficiency in BGP, VLANs, IPsec, TLS/SSL, SSH, DNS, ARP, LACP, LLDP, 802.1X.
• Experience troubleshooting complex network connectivity and performance.
• Knowledge of network security, vulnerability remediation, and hardening.
• Familiarity with Windows and Linux integration in the network.

Responsibilities

• Design, configure, administer, and maintain enterprise LAN/WAN infrastructure.
• Configure and troubleshoot Cisco IOS/NX-OS routing and switching.
• Administer Palo Alto Next-Generation Firewalls, VPN configurations, and policies.
• Install, configure, and maintain TACLANE encryption devices and cryptographic infrastructure.
• Manage and troubleshoot F5 load balancers (GTM, BIG-IP DNS).
• Monitor performance, analyze traffic, and troubleshoot connectivity and latency.
• Perform vulnerability assessments, patching, and system hardening.
• Troubleshoot outages impacting voice, video, and data communications.
• Collaborate with cybersecurity and infrastructure teams; support data center networking.

Skills

DOE Q or Top Secret clearance

Cisco routing & switching

Palo Alto NGFW

F5 BIG-IP

VPN configurations

GTM & BIG-IP DNS

BGP

VLANs

LACP

LLDP

802.1X

IPsec

TLS/SSL

SSH

TACLANE encryption devices

Cryptographic networking

Network security concepts

Windows/Linux integration

Tools

Cisco IOS

Cisco NX-OS

Palo Alto NGFW

TACLANE

F5 BIG-IP

GEM One

Job description

Zachary Piper Solutions is seeking a Tier 3 Network Engineer to support enterprise network infrastructure in Washington, DC. The role involves designing, configuring, maintaining, and troubleshooting complex Cisco, Palo Alto, and F5 environments onsite.

The candidate must hold an active DOE Q or Top Secret clearance and have hands-on experience with TACLANE encryption, GTM/BIG-IP DNS, VPNs, and secure networking. This position is onsite in Washington, DC for federal program work.