Senior Network and Computer Systems Administrator

Allant Federal; Fayetteville (NC); On-site; USD 90,000 - 120,000; Full time

Job summary

Allant Federal is seeking an experienced Senior Network and Computer Systems Administrator to provide on-site Tier II support, including design, installation, configuration, maintenance, and troubleshooting of enterprise network systems. The role emphasizes security, reliability, and proactive monitoring to support mission-critical operations.

Responsibilities include configuring firewalls and routers, maintaining network documentation, and collaborating with Special Operations IT professionals

Qualifications

• Active TS/SCI clearance at start date and maintained throughout employment.
• 5+ years of Network/IT experience.
• DoD 8570 IAT Level II compliant certification, or applicable DoD 8140 qualification.
• Cisco CCNA or equivalent with knowledge of IPsec and SSL VPNs.
• Experience with Palo Alto, Juniper JUNOS, VPNs, OSPF, BGP, IP routing, and LAN/WAN tech.

Responsibilities

• Design, install, configure, maintain, and troubleshoot enterprise network systems on-site.
• Document, test, and perform problem isolation to maintain reliability.
• Monitor and optimize network performance for reliable connectivity.
• Review logs to ensure compliance with security standards.
• Plan and coordinate network initiatives and upgrades.
• Evaluate new network equipment and solutions to support operations.
• Collaborate with IT teams to resolve complex client/server issues.

Skills

CCNA certification

IAT Level II

VPN technologies

Palo Alto firewalls

Juniper JUNOS

Nexus/Catalyst/ASR platforms

Wireshark

tcpdump

LAN/WAN

Multi-vendor troubleshooting

Documentation

Analytical skills

Team collaboration

Security standards compliance

Tools

Cisco Nexus

Cisco Catalyst

Cisco ASR

Job description

Allant Federal is seeking an experienced Senior Network and Computer Systems Administrator to provide on-site Tier II technical support, including the design, installation, configuration, maintenance, and troubleshooting of enterprise network systems. This role is responsible for ensuring network performance, reliability, and security through proactive monitoring, problem resolution, and adherence to established policies and procedures. The Senior Network and Computer Systems Administrator will collaborate with Special Operations network professionals and other technical teams to resolve complex networking issues, coordinate system changes, and support mission-critical operations.

Key Responsibilities

• Design, install, configure, maintain, and troubleshoot enterprise network systems while providing on-site Tier II technical support.
• Document, implement, test, and perform problem isolation and resolution to maintain network reliability and operational efficiency.
• Monitor, tune, and optimize network performance to ensure reliable connectivity and quality transmission services.
• Maintain and review system and security logs to identify potential issues and ensure compliance with established security standards.
• Plan and coordinate computer network initiatives, including system improvements, upgrades, and configuration changes.
• Research, evaluate, and recommend new network equipment, technologies, and solutions to support operational requirements.
• Design network solutions that address operational challenges within the capacity and limitations of existing infrastructure.
• Administer and enforce network policies, procedures, configuration standards, and security requirements.
• Configure, manage, and troubleshoot network infrastructure, including firewalls, routers, switches, and VPN technologies.
• Troubleshoot complex multi-vendor LAN/WAN issues, identify network bottlenecks, and resolve configuration and connectivity problems.
• Evaluate network performance and collaborate with users to diagnose and resolve moderately complex technical issues.
• Develop and maintain clear technical documentation, including network procedures, configurations, and diagrams.
• Collaborate with other IT professionals to resolve complex client/server issues and coordinate cross-team technical efforts.

Required Qualifications

• Active Top Secret/Sensitive Compartmented Information (TS/SCI) clearance at start date and maintained throughout employment.
• 5+ years of Network/Information Technology (IT) experience.
• Department of Defense (DoD) 8570 Information Assurance Technical (IAT) Level II compliant certification, or applicable DoD 8140 qualification.
• Cisco Certified Network Associate (CCNA) certification or equivalent experience, with knowledge of CompTIA Network+ and Security+.
• Experience administering, configuring, troubleshooting, and supporting enterprise network environments using Palo Alto firewalls, Juniper JUNOS, Internet Protocol Security (IPSec) and Secure Sockets Layer (SSL) Virtual Private Networks (VPNs), Open Shortest Path First (OSPF), Border Gateway Protocol (BGP), static routing, Layer 2 switching, Layer 3 routing, tcpdump, Wireshark, and Local Area Network/Wide Area Network (LAN/WAN) technologies.
• Advanced knowledge of the Open Systems Interconnection (OSI) model, common network protocols, and Transmission Control Protocol/User Datagram Protocol (TCP/UDP) ports.
• Experience troubleshooting multi-vendor network environments, identifying performance and configuration issues, and implementing effective solutions.
• Ability to develop clear and accurate technical documentation, network procedures, and diagrams.
• Strong analytical, troubleshooting, organizational, communication, and active-listening skills.
• Ability to collaborate effectively with technical teams, end users, and personnel across multiple departments.
• Ability to follow established network protocols, methodologies, security procedures, and operational standards.

Desired Qualifications

• Information Technology Infrastructure Library (ITIL) v4 Foundation certification.
• Experience with Cisco Nexus, Cisco Catalyst, and Cisco Aggregation Services Router (ASR) products.