Information Assurance Security Engineer (IASE) / Information Systems SecurityEngineer (ISSE)

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

Job summary

Leidos is seeking an Information Assurance Security Engineer (IASE) / Information Systems Security Engineer (ISSE) to secure and maintain critical enterprise systems in Suitland, MD. You will collaborate across networks, systems, cybersecurity, and architecture teams to strengthen security posture.

The role is hands-on with vulnerability remediation, security testing, and architecture support. Active TS/SCI clearance is required and level of opportunity will match experience.

Qualifications

• Bachelor's degree in Cybersecurity, Electrical Engineering, Information Technology, Information Assurance, or related field with 8+ or 12+ years of experience.
• Active TS/SCI security clearance.
• 8+ years of security engineering experience, including DoD RMF/ ICD 503 / NIST RMF.
• 5+ years of software development experience using Java, C, C++, or other languages.
• Experience with IC/DoD/DISA processes and A&A.

Responsibilities

• Serve as primary security engineering resource for enterprise infrastructure, performing administration, hardening, troubleshooting, and remediation.
• Research and evaluate cybersecurity tools and methodologies to strengthen enterprise security.
• Participate in architecture reviews and provide security recommendations for new capabilities and infrastructure changes.
• Troubleshoot complex security issues across storage, networking, OS, authentication, and enterprise infrastructure.
• Conduct vulnerability assessments, ethical hacking, and penetration testing to identify risks.
• Review and harden storage protocols and services (NFS, SMB/CIFS, iSCSI, management interfaces).
• Apply and validate DISA STIGs/SRGs, vendor guidance, and industry best practices.
• Configure and maintain secure admin access using SSH, TLS, RBAC, centralized authentication, least privilege.
• Develop and deliver training on cybersecurity tools, technologies, and processes.

Skills

Security engineering

DoD RMF

SCAP

Java

C

C++

Security testing

Vulnerability remediation

Network security

Education

Bachelor's degree in Cybersecurity/Information Assurance

Master's degree (optional)

Tools

Trellix/ESS

ACAS

RedSeal

Evaluate STIG

SteelCloud ConfigOS

STIG Manager

Job description

Description

Information Assurance Security Engineer (IASE) / Information Systems Security Engineer (ISSE)

Location: Suitland, MD
Clearance: Active TS/SCI

Leidos is hiring a hands-on Information Assurance Security Engineer (IASE) / Information Systems Security Engineer (ISSE) to support a complex, mission-driven enterprise environment in Suitland, MD.

In this engineering-focused role, you will actively secure, administer, harden, and maintain critical systems and infrastructure while collaborating across network, systems, cybersecurity, and architecture teams to continuously strengthen and evolve the organization's overall security posture. You will combine deep technical security expertise with hands on engineering, vulnerability remediation, security testing, and architecture support to help protect mission critical systems and capabilities.

This posting is for multiple opportunities ranging in years of experience. Level of opportunity, including compensation, will be matched to a candidate's experience.

Responsibilities

• Serve as a primary security engineering resource for enterprise infrastructure, providing hands on administration, configuration, security hardening, troubleshooting, and vulnerability remediation.
• Research and evaluate cybersecurity tools, technologies, and methodologies to identify opportunities to strengthen enterprise security.
• Participate in architecture and engineering reviews and provide security recommendations for new capabilities, technologies, and infrastructure changes.
• Troubleshoot complex security issues across storage, networking, operating systems, authentication, and enterprise infrastructure.
• Conduct vulnerability assessments, ethical hacking, and penetration testing to identify and address security risks.
• Review and harden storage protocols and services, including NFS, SMB/CIFS, iSCSI, and management interfaces, based on operational and security requirements.
• Apply and validate applicable DISA Security Technical Implementation Guides (STIGs), Security Requirements Guides (SRGs), vendor security guidance, and industry security best practices.
• Configure and maintain secure administrative access using technologies and principles such as SSH, HTTPS/TLS, role based access control (RBAC), centralized authentication, and least privilege.
• Develop and deliver training on cybersecurity tools, technologies, and processes.

Required Qualifications

• Bachelor's degree in Cybersecurity, Electrical Engineering, Information Technology, Information Assurance, or a related field with 8+ or 12+ years of experience; Master's degree with 8+ or 10+ years of experience. Additional relevant experience may be considered in lieu of a degree.
• Active TS/SCI security clearance.
• 8+ years of security engineering experience, including experience with DoD RMF, ICD 503, and/or the NIST Risk Management Framework.
• Extensive experience with Intelligence Community (IC), Department of Defense (DoD), Defense Information Systems Agency (DISA), NAVINTEL Cybersecurity, Fleet Cyber Command (FLTCYBERCOM), and DoDIIS processes, tools, systems, reporting mechanisms, and requirements supporting Assessment and Authorization (A&A).
• 5+ years of software development experience using Java, C, C++, or other programming or scripting languages, including experience designing and developing host based and network based scanning tools.
• Experience with Security Content Automation Protocol (SCAP) based tools and specifications.
• Experience installing, configuring, testing, deploying, operating, and maintaining enterprise network based scanning and reporting tools such as Trellix/ESS, ACAS, RedSeal, Evaluate STIG, SteelCloud ConfigOS, and STIG Manager.
• Extensive experience hardening modern Unix operating systems, such as Oracle Solaris 10/11 and RHEL, as well as Microsoft Windows environments using Security Technical Implementation Guides (STIGs).
• Extensive experience securing systems and software in accordance with IC, DoD, and industry security best practices.
• Experience developing security controls, testing methodologies, and test procedures for systems, cloud based architectures, and Cross Domain Solutions (CDS).
• 2+ years of project management experience.
• Demonstrated ability to take a proactive, results oriented approach while building effective customer and team relationships.

Required Certifications

• Active IAT or IAM Level III DoD 8140 approved baseline certification, such as CISSP ISSEP or SecurityX, or the ability to obtain the required certification within 30 days of hire.

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.

Pay Range:Pay Range $107,900.00 - $195,050.00

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.

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.

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 at www.leidos.com/careers/pay-benefits.

• Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement.

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.