Senior Network Security Engineer

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October 31

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Leidos

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Defense • Cybersecurity • Science

Leidos is a leading systems integrator in science, technology, and engineering, providing solutions that transform and enable the missions of its customers. The company operates across various markets, including aviation, defense, energy, government, healthcare, intelligence, science, and space. Leidos is involved in AI, digital modernization, cyber operations, and integrated and mission software systems. With a commitment to diversity, equity, inclusion, and sustainability, Leidos also engages in charitable efforts and community enrichment programs. Additionally, it contributes to developing solutions for counter-unmanned aerial systems and electric vehicle infrastructure for military applications.

10,000+ employees

Founded 1969

🔒 Cybersecurity

🔬 Science

📋 Description

• Engineer, operate, and maintain secure RONIN network security solutions within the AGUN enterprise, ensuring mission assurance and network resilience across distributed Army environments. • Partner with AGUN stakeholders and technical teams to integrate RONIN capabilities into existing and emerging network architectures to enhance operational continuity. • Analyze and optimize complex firewall and segmentation policies supporting secure, dynamic node-to-node interconnectivity under contested or degraded conditions. • Support implementation of Zero Trust Network Access (ZTNA) frameworks and adaptive routing technologies that enhance RONIN node performance and survivability. • Lead troubleshooting and mitigation of high-impact network and security events affecting RONIN operations, coordinating with the AGUN Cybersecurity Service Provider (CSSP). • Integrate resilient network design, load balancing, and recovery mechanisms into operational processes and capacity planning. • Conduct network anomaly detection, security forensics, and performance monitoring to ensure optimal RONIN node integrity and operational readiness. • Ensure compliance with DoD STIGs, Army cybersecurity policy, and other applicable directives for secure network operations. • Develop and maintain technical documentation, topology diagrams, and configuration baselines using collaborative platforms and version-controlled repositories.

🎯 Requirements

• Bachelor’s degree with 12+ years of experience, or Master’s degree with 10+ years of experience • Active DoD IAT Level II (e.g., Security+) certification or equivalent prior to start • Expert understanding of network security, segmentation, and virtualization technologies, including VSYS and multi-tenant environments. • Demonstrated experience with LAN, WAN, BGP, TCP/UDP, IPSec, VPN, L2/L3 routing, and firewall operations within hybrid or virtualized infrastructures • Experience with one or more enterprise management platforms such as Palo Alto Panorama, Cisco ISE, Tenable Security Center, VMWARE vSphere, Redhat Openshift, Cisco Prime, Cisco DNA, or Junos Space • Proven ability to apply DoD STIGs and system hardening standards to enterprise network environments • Experience with two or more of the following vendor technologies: Cisco, Juniper, Palo Alto, Dell, RAVPN, GlobalProtect, or AppGate • Working knowledge of SFTP, SSH, SCP, MPLS, SNMP, and NTP • Ability to work collaboratively in a high-tempo, mission-driven environment, executing complex troubleshooting and resolution efforts • Strong written and verbal communication skills • Willingness to work non-standard shifts to support mission operations • Ability to travel up to 10%.

🏖️ Benefits

• competitive compensation • Health and Wellness programs • Income Protection • Paid Leave • Retirement