IT Security Engineer I

Leidos•Huntsville, AL

About The Position

We are 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. The IT Security Engineer I will work under the guidance of senior engineers to assist with firewall platforms such as Cisco ASA and Fortinet, SASE solutions, Web Application Firewalls (WAFs), and other security technologies. This position collaborates with engineering teams, operations staff, and program stakeholders to help deliver secure and compliant solutions in support of NASA’s mission and OCIO customers. Primary 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 Basic Qualifications 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 Qualifications 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 If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares. Original Posting: March 16, 2026 For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above. Pay Range: Pay Range $57,850.00 - $104,575.00 The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law. Leidos Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $17.2 billion for the fiscal year ended January 2, 2026. For more information, visit www.Leidos.com. Pay and Benefits Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available here. Securing Your Data Leidos will never ask you to provide payment-related information at any part of the employment application process. And Leidos will communicate with you only through emails that are sent from a Leidos.com email address. If you receive an email purporting to be from Leidos that asks for payment-related information or any other personal information, please report the email to spam.leidos@leidos.com. Commitment and Diversity All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.

Requirements

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

Nice To Haves

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

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