Sr. Network Administrator

Zachary Piper Solutions is seeking a Sr. Network Administrator to support a long-standing DoD Intelligence Program based in Newington, VA. This full-time, 100% onsite role is critical to maintaining secure, reliable, and high-performance enterprise networking capabilities supporting intelligence missions within a TS/SCI environment.

About the role

The right candidate will play a key role in enterprise network operations, infrastructure support, network access control, and secure communications across large-scale Cisco-based environments. This individual will support network administration, troubleshooting, automation, compliance, and infrastructure modernization initiatives.

Responsibilities

• Configure, maintain, and support enterprise network switches and routers.
• Monitor network health, performance, and availability.
• Respond to incidents, alerts, and support tickets in accordance with operational procedures.
• Troubleshoot connectivity, routing, and switching issues to restore services rapidly.
• Support and administer Cisco Identity Services Engine (ISE) for network access control and policy enforcement.
• Utilize Cisco DNA Center (DNAC) for policy-based automation, network assurance, and centralized management.
• Assist with deployment and optimization of network automation capabilities.
• Participate in network design discussions and implementation activities.
• Support equipment installation, cabling, fiber connections, and infrastructure buildouts.
• Configure and maintain VLANs, routing policies, trunking, and network segmentation.
• Collaborate with senior engineers on enterprise network enhancement initiatives.
• Maintain secure networking environments supporting mission-critical operations.
• Implement firewall policies, VPN configurations, ACLs, and network access controls.
• Support cybersecurity requirements and compliance standards within a TS/SCI Army environment.
• Adhere to established change management and security procedures.
• Diagnose network performance and connectivity problems.
• Utilize packet analysis and troubleshooting tools including Wireshark and NetFlow.
• Perform root-cause analysis and provide recommendations for service improvements.
• Document network configurations, operational procedures, and change activities.
• Work closely with network engineers, system administrators, and cybersecurity personnel.
• Communicate technical concepts effectively to both technical and non-technical stakeholders.
• Utilize strong interpersonal and technical skills to support customer mission requirements.

Requirements

• High School Diploma or equivalent.
• 3+ years of enterprise network administration experience.
• Experience configuring and supporting enterprise network switches and routers.
• Strong understanding of TCP/IP, DNS, DHCP, STP, SNMP, and routing fundamentals.
• Hands-on experience with Cisco Identity Services Engine (ISE).
• Experience administering Cisco DNA Center (DNAC).
• Knowledge of firewalls, ACLs, NAT, and VPN technologies.
• Experience with VLANs, trunking, inter-VLAN routing, and segmentation.
• Proficiency using packet capture and analysis tools such as Wireshark and NetFlow.
• Familiarity with enterprise wireless networking technologies and RF troubleshooting.
• Understanding of RADIUS, TACACS+, and 802.1X network access control technologies.
• Active TS/SCI Clearance REQUIRED.

Pay

Salary Range: $120,000 – $135,000 depending on experience.

Benefits

• Medical
• Dental
• Vision
• 401K
• PTO
• Sick Leave (if required by law)