Cyber Defense Infrastructure Support Engineer

Leidos Inc; Suitland (MD); On-site; USD 108,000 - 195,000; Full time

Benefits offered by this job

Health and Wellness programs

Income Protection

Paid Leave and Retirement

Job summary

Leidos Inc. seeks a Cyber Defense Infrastructure Support Engineer in Suitland, MD. The role focuses on evaluating new cybersecurity technologies, leading implementation, and maintaining tools across complex networks.

A TS/SCI clearance is required; experience spans Windows and Unix/Linux environments with SIEM and vulnerability tooling. Responsibilities include RMF compliance, high-level troubleshooting, lifecycle management of tools, documentation, and training development for cybersecurity

Qualifications

• Bachelor's degree in Cybersecurity/IT or related field; Master's preferred.
• 15+ years of experience in lieu of a Bachelor's degree.
• Active TS/SCI clearance in DISS.
• 10+ years with LAN/WAN, Windows and Unix/Linux environments.
• 6+ years integrating and operating cybersecurity technologies.
• Knowledge of SIEM platforms (Splunk, Sentinel, Elastic).
• Experience with enterprise network management and cybersecurity tools.
• Familiarity with vulnerability management (ACAS/Tenable) and SCAP.
• Knowledge of virtualization (VMware, Azure VMs, VirtualBox).
• Scripting/programming: Python, PowerShell, Java, C/C++/JavaScript.
• Experience with ServiceNow ticketing/reporting.

Responsibilities

• Research and evaluate emerging cybersecurity technologies for enterprise use.
• Lead engineering and system administration for new cybersecurity tools.
• Install, configure, integrate, and maintain cybersecurity technologies across networks.
• Hardening, RMF activities, and DoD security benchmark compliance.
• Provide Tier 3 support: complex troubleshooting and root cause analysis.
• OS and application support for Windows and Unix/Linux environments.
• Support cybersecurity tool upgrades, maintenance, and lifecycle management.
• Validate interoperability with existing enterprise capabilities.
• Develop and maintain technical diagrams, docs, and procedures.
• Develop and deliver training on cybersecurity tools and processes.
• Support annual cybersecurity exercise planning and execution.

Skills

LAN/WAN networking

Windows admin

Unix/Linux admin

Scripting languages

Security tools integration

Education

Bachelor's degree in Cybersecurity/IT

Master's degree preferred

Tools

Splunk

Microsoft Sentinel

Elastic

BeyondTrust Retina

Tenable Nessus (ACAS)

VMware

Azure Virtual Machines

VirtualBox

ServiceNow

Job description

Description

Cyber Defense Infrastructure Support Engineer

Location: Suitland, MD
Clearance: Active TS/SCI

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

• Bachelor's degree in Cybersecurity, Information Technology, Information Assurance, or a related area of study desired; Master's degree preferred.
• 15+ years of relevant professional experience in lieu of a Bachelor's 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.

Pay Range $107,900.00 - $195,050.00

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.

• competitive compensation
• Health and Wellness programs
• Income Protection
• Paid Leave and Retirement

More details are available at www.leidos.com/careers/pay-benefits.

About 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 $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit www.Leidos.com.

Commitment to Non-Discrimination

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.