Systems Engineer III

Description

Position:
Systems Engineer III

Location:
Melbourne, FL (Patrick SFB)

Make an Impact with Leidos

At Leidos, we deliver innovative solutions through the dedication of our diverse and talented teams. United by a shared commitment to our customers’ success, we empower our people, support our communities, and operate sustainably. Our Mission, Vision, and Values guide every aspect of our work, ensuring we do the right thing—for our customers, our people, and the world around us.

Thrive in an Impactful Environment

The Leidos Defense Sector offers a broad portfolio of systems, solutions, and services across land, sea, air, space, and cyberspace. We support critical defense missions with capabilities in enterprise and mission IT, large-scale intelligence systems, command and control, geospatial and data analytics, cybersecurity, logistics, training, and intelligence operations. Our teams tackle the world’s toughest security challenges for customers with “can’t fail” missions.

Leidos Defense Sector is seeking a Systems Engineer III (Linux) to support the Air Force Technical Applications Center (AFTAC) U.S. National Data Center (US NDC). The US NDC operates a mission‑critical, high‑availability system within secure DoD environments supporting national security objectives.

This role focuses on system engineering, platform sustainment, cybersecurity compliance, and Dev Sec Ops  integration across Linux and Solaris environments. The selected candidate will support COTS application installation and lifecycle management, system hardening, patching, upgrades, and 24×7 operational troubleshooting across classified and unclassified infrastructures. This is an opportunity to directly support a critical national security mission while ensuring system resilience, cybersecurity compliance, and operational excellence.

Primary Responsibilities:

• Engineer, administer, and sustain enterprise Linux and Solaris systems supporting mission applications

• Install, configure, upgrade, and maintain Commercial Off-The-Shelf (COTS) software in secure environments

• Lead system patching, upgrades, and vulnerability remediation to maintain cybersecurity compliance

• Implement and maintain system hardening in accordance with DISA STIGs
  , RMF controls,
  DoD cybersecurity policies, and Zero Trust architecture principles

• Troubleshoot complex system, application, and infrastructure issues in a 24x7 mission environment, performing root-cause analysis and resolution

• Develop and maintain automation scripts and configuration management solutions (i.e. Ansible) to improve system consistency, compliance, and deployment repeatability

• Collaborate with software, database, network, and cybersecurity teams to ensure reliable system integration

• Support deployment pipelines and Dev Sec Ops  practices for system and application releases

• Maintain system documentation, configuration baselines, and operational procedures

• Participate in on-call rotation and operational sustainment activities

Basic Qualifications:

• Bachelor’s degree in Information Technology, Computer Science, or related disciple with 4+ years of related experience. Additional experience, training, or certifications may substitute for degree

• U.S. citizen;
  Currently possessing an Active DoD Top Secret clearance and eligibility for Top Secret/SCI

• Currently hold a DoD 8140 IAT level II certification (e.g., CompTIA Sec+)

• Experience administering Linux (RHEL or equivalent) systems in enterprise environments

• Experience installing, configuring, and upgrading COTS software applications

• Direct experience managing systems with Red Hat Satellite

• Experience developing and maintaining Ansible automation for configuration management

• Familiarity with Linux system hardening and security compliance practices

• Strong troubleshooting experience in complex, integrated systems

• Experience with system patching, lifecycle management, and vulnerability remediation

• Familiarity with DISA STIGs, RMF, and DoD cybersecurity, and Zero Trust acrhitecture compliance requirements

Preferred Qualifications:

• Experience in Dev Sec Ops  environments and CI/CD pipeline integration

• Experience with automation tools (Ansible, Bash, Python)

• Experience with…