Network Systems Engineer - Cyber

The will support Cyber Security Defensive Operations through the engineering, integration, automation, and sustainment of a large-scale Cyber Range consisting of hundreds to thousands of virtual machines. This role focuses on designing, configuring, and maintaining networked cyber environments using Infrastructure as Code (IaC), Terraform, Ansible, VMware, and other automation technologies.

You will work closely with Red, Hunt, Blue and JCMA Team operators to understand mission requirements and engineer Cyber Range environments that support training, force-on-force exercises, and the emulation of customer infrastructures. Working alongside Network Engineers, Systems Engineers, Software Engineers, and System Administrators, you will develop and implement scalable, automated infrastructure solutions supporting complex cyber operations.

When not supporting Cyber Range activities, you will contribute to mission operations within the Cyber Security Directorate's Defensive Network Operations organization by engineering, integrating, and sustaining operational network infrastructure.

• Bachelor's degree in Network Engineering, Systems Engineering, Information Technology, or a related technical field plus 12 or more years of relevant experience

• Experience engineering and supporting enterprise network infrastructure, including networking technologies, virtualization, and operational environments.

• Experience with Infrastructure as Code (IaC), including Terraform and Ansible automation.

• Experience with scripting languages such as Bash, PowerShell, Python, or Batch.

• Experience with Arista, Cisco, and Juniper networking platforms, along with configuring and integrating cybersecurity tools and operational network infrastructure.

• Knowledge of Windows and Linux operating systems, application behavior, and network traffic analysis in support of cyber operations.

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• Experience working in Agile and/or DevOps environments.

• Experience with Kubernetes, Docker, or other container technologies.

• Knowledge of penetration testing, Hunt, Red Team, or Defensive Cyber Operations.

• Experience with Splunk administration or engineering.

• Experience supporting Nutanix environments.

• Experience supporting Defensive Cyber Security Operations.

has a new and exciting opportunity for a in our . Our talented team is at the forefront in Security Engineering, Computer Network Operations (CNO), Mission Software, Analytical Methods and Modeling, Signals Intelligence (SIGINT), and Cryptographic Key Management.

At , we offer , including Paid Time Off, 11 paid Holidays, 401K with a 6% company match and immediate vesting, Flexible Schedules, Discounted Stock Purchase Plans, Technical Upskilling, Education and Training Support, Parental Paid Leave, and much more.

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. July 22, 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 $131,300.00 - $237,350.00 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 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 $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit www.Leidos.com . 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 at www.leidos.com/careers/pay-benefits .