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Leidos
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March 16, 2026
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IT Security Engineer I

Huntsville, AL
Full-time
Onsite
$58K/yr - $105K/yr
Entry Level
Leidos is seeking a motivated IT Security Engineer I to join the AEGIS Security Infrastructure Engineering team supporting the NASA AEGIS Program. This role supports the engineering, configuration, testing, and documentation of secure network and security infrastructure solutions within a complex, multi-vendor enterprise environment.
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Responsibilities

  • Assist in the configuration, testing, and documentation of network security solutions
  • Support engineering efforts involving Cisco ASA, Fortinet firewalls, SASE, and WAF technologies
  • Participate in troubleshooting firewall, network security, and connectivity issues and help perform root cause analysis
  • Work with senior engineers to implement secure architecture designs and infrastructure changes
  • Support change management activities, peer reviews, and engineering lifecycle processes
  • Maintain technical documentation including diagrams, procedures, and implementation plans
  • Monitor security infrastructure performance and assist with issue resolution
  • Collaborate with cross-functional teams to support secure system deployments and ongoing operations
  • Ensure adherence to enterprise security standards and government compliance requirements

Qualification

Required

  • Ability to obtain a Public Trust Clearance
  • Bachelor's degree in Information Technology, Cybersecurity, or a related field, or equivalent experience
  • 1–3+ years of experience in network security, cybersecurity, or infrastructure engineering
  • Foundational knowledge of networking concepts such as TCP/IP, routing, switching, NAT, and firewall policy concepts
  • Exposure to enterprise security platforms such as Cisco ASA, Fortinet, or cloud security technologies

Preferred

  • Cisco Certified Network Associate (CCNA) certification preferred
  • Industry certifications such as CompTIA Security+, Network+, or Fortinet NSE Associate level certifications
  • Strong oral and written communication skills
  • Willingness to learn enterprise security architecture and engineering best practices
  • Experience supporting security or networking technologies in lab, internship, academic, or professional environments
  • Familiarity with change management processes and technical documentation standards
  • Experience working in large enterprise or government environments is a plus

Benefits

Leidos is a Fortune 500® innovation company rapidly addressing the world’s most vexing challenges in national security and health.
Glassdoor
3.9
Founded in 1969
Reston, Virginia, USA
10001+ employees
https://www.leidos.com
Leidos is a Fortune 500® innovation company rapidly addressing the world’s most vexing challenges in national security and health.
Glassdoor
3.9
Founded in 1969
Reston, Virginia, USA
10001+ employees
https://www.leidos.com