Linux Systems Engineer

Nightwing Intelligence Solutions•Sterling, VA

23h•$122,000 - $253,000

About The Position

Roka Security is seeking a Linux Systems Engineer to design, deploy, optimize, automate, and support large-scale Linux infrastructure for secure networking and remote-access services. The role focuses on Linux networking, policy-based routing, infrastructure automation, and VPN technologies including WireGuard, OpenVPN, and IPSec. The engineer will collaborate with engineering, systems administration, and platform engineering teams to deliver highly available, secure, and scalable infrastructure in mission-critical environments.

Requirements

Current active TS/SCI clearance and ability to pass a CI Polygraph.
Associate or bachelor's degree in Computer Science, Information Technology, or a related field, or an equivalent combination of technical training and hands-on experience.
Strong hands-on experience with Debian and Ubuntu Linux.
Experience with dynamic and static routing, VLANs, trunking, NAT, and firewall policies.
Experience with WireGuard, OpenVPN 2.6+, IPSec, PKI, and certificate management.
Experience with Bash, Git, and CI/CD workflows.
Exceptional troubleshooting and root-cause analysis capabilities.
Strong documentation and technical writing skills.
Ability to operate independently in mission-critical environments.
Security-first mindset and strong infrastructure design principles.
Excellent collaboration and communication skills.

Nice To Haves

Experience supporting Google Cloud Platform (GCP), Amazon Web Services (AWS), and Microsoft Azure.
Experience with Docker and Kubernetes.
Experience supporting confidential computing environments.
Industry certifications such as RHCE, LFCE, CCNP, or equivalent advanced certifications.

Responsibilities

Design, deploy, administer, and maintain enterprise Linux environments.
Develop standardized operating system configurations and hardened baseline builds.
Perform operating system upgrades, patch management, lifecycle maintenance, and performance optimization.
Troubleshoot complex operating system, networking, and application issues.
Configure and troubleshoot OSPF and static routing, VLANs, LACP, 802.1Q trunking, network namespaces, VRFs, NAT, and firewall policies.
Analyze and troubleshoot network traffic using tcpdump, Wireshark, iproute2, nftables, and iptables.
Design, deploy, and support secure VPN infrastructures using OpenVPN 2.6+, WireGuard, and IPSec.
Troubleshoot encryption, routing, MTU, and performance issues while implementing modern cryptographic standards and VPN hardening practices.
Automate system provisioning, configuration deployment, compliance enforcement, VPN deployments, and security baseline management.
Integrate SaltStack with CI/CD pipelines and infrastructure monitoring platforms.
Collaborate with cross-functional teams to support project initiatives and resolve technical issues.
Document system configurations, procedures, and troubleshooting steps for knowledge sharing and training.
Contribute to knowledge base articles and best-practices documentation.