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Cyber Defense Infrastructure Support Engineer

Leidos


Job Location:

Suitland, MD - USA

Monthly Salary: $ 107900 - 195050
Posted: 22 August 2026 (14 hours ago)
Application Deadline: 19 November 2026
Vacancies: 1 Vacancy

Job Summary

Cyber Defense Infrastructure Support Engineer

Location: Suitland MD
Clearance: Active TS/SCI

Join a mission focused team supporting the Navys cybersecurity environment at the ONI Hopper Global Communications Center!

As a Cyber Defense Infrastructure Support Engineer in Suitland MD you will build configure integrate and maintain the security systems that help protect critical TS/SCI networks and keep essential cybersecurity tools and services operating securely and reliably.

You will serve as a senior technical resource providing Tier 3 escalation support evaluating emerging technologies and leading the engineering and administration of cybersecurity capabilities across the environment.

Responsibilities

  • Research and evaluate emerging cybersecurity technologies and capabilities for potential use within the enterprise environment.
  • Serve as an engineering and system administration lead for the implementation of new cybersecurity tools and technologies.
  • Install configure integrate administer and maintain cybersecurity technologies across complex network environments.
  • Perform network and system hardening and support Risk Management Framework (RMF) activities to meet applicable DoD security requirements and benchmarks.
  • Provide Tier 3 technical support including complex system troubleshooting root cause analysis and performance tuning.
  • Provide operating system and application support across Windows and Unix/Linux environments.
  • Support cybersecurity tool integration upgrades maintenance and lifecycle management.
  • Validate interoperability between new technologies and existing enterprise capabilities.
  • Develop and maintain technical documentation system diagrams procedures and user guides.
  • Develop and deliver training on cybersecurity tools architectures technologies and processes.
  • Support annual cybersecurity exercise planning and execution.

Required Qualifications

  • Bachelors degree in Cybersecurity Information Technology Information Assurance or a related area of study desired; Masters degree preferred.
  • 15 years of relevant professional experience in lieu of a Bachelors degree.
  • Active TS/SCI Security clearance in DISS.
  • 10 years of professional experience with Local Area Network (LAN) and Wide Area Network (WAN) technologies networking protocols file systems ports services and commands including experience with Windows and Unix/Linux environments.
  • 6 years of professional experience integrating implementing and operating cybersecurity technologies.
  • Knowledge of Security Information and Event Management (SIEM) platforms such as Splunk Microsoft Sentinel and Elastic.
  • Experience with enterprise network management and cybersecurity tools.
  • Knowledge of vulnerability management and assessment technologies such as BeyondTrust Retina Tenable Nessus (ACAS) and SCAP.
  • Knowledge of virtualization technologies such as VMware Azure Virtual Machines and VirtualBox.
  • Knowledge of scripting and programming languages such as Python Perl Ruby JavaScript PowerShell C C and Java.
  • Knowledge of ticketing and reporting systems such as ServiceNow.

Required Certifications

  • Active IAT or IAM Level II/III DoD approved 8570 baseline certification such as SecurityX CE or CASP certification or the ability to obtain the required certification within 30 days of hire.
  • Computing Environment (CE) certification or the ability to obtain the required certification within 30 days of hire.

NITESONI

DABAOPP1

If youre looking for comfort keep scrolling. At Leidos we outthink outbuild and outpace the status quo because the mission demands it. Were not hiring followers. Were recruiting the ones who disrupt provoke and refuse to fail. Step 10 is ancient history. Were already at step 30 and moving faster than anyone else dares.

Original Posting:
August 20 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 $107900.00 - $195050.00

The Leidos pay range for this job level is a general guideline onlyand 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.


Required Experience:

IC


About Company

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Leidos is an innovation company rapidly addressing the world's most vexing challenges in national security and health. Our 47,000 employees collaborate to create smarter technology solutions for customers in these critical markets.

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