Description

Leidos is seeking an Information Systems Security Engineer (ISSE) for a technical development program supporting cloud-based applications, and its associated cloud infrastructure located on a highly secure network. The ISSE will work with a large team of developers, system engineers, DevOps engineers, database administrators, and system architects.

Core business hours for the team are from 9 AM to 3 PM daily - exceptions outside of those hours for the candidate may be negotiated in consultation with management.

The typical day for an ISSE supporting the cloud-based applications is as follows:

• The ISSE will participate in the team’s regularly scheduled Agile tag up (scrum) meetings and report on the status of their assigned Jira issues
• Attend ad-hoc TEMs with the team to discuss and weigh in on numerous architectural aspects of the systems for assessing security impacts that may arise with system changes
• Assist with and/or lead security scans of the systems and report and analyze findings for impacts
• Review any security findings (CVEs) as noted by outside entities for system impact analysis and how best to proceed with addressing them
• Participate in team TEMs and review future system changes/new features for security impacts

Primary Responsibilities

• Identifying, selecting, implementing and assessing NIST SP 800-53 security and privacy controls.
• Developing, establishing and integrating secure configuration baselines per DISA STIGs and CIS benchmark guidelines
• Participate in creating secure architectures and designs
• Ensuring security requirements are integrated into the System/Software Development life cycle (SDLC).
• Performing Continuous Monitoring (ConMon) activities to support Assessment and Authorization (A&A) requirements
• Reviewing, creating and maintaining relevant Assessment and Authorization (A&A) artifacts
• Performing security analysis and monitoring of a 100 percent AWS, cloud-based system
• Performing vulnerability scanning and analysis of the system
• Perform remediation and develop security implementations based on security findings
• Interface with Information System Security Managers (ISSM) to develop and accredit the system
• Participate in or lead technical exchange meetings, document meeting outcomes as needed, and brief management

Required Qualifications

• Bachelor's degree and 8+ years of experience. Additional experience in lieu of degree.
• Active TS/SCI with Polygraph
• Other qualifications:
  • Hands on experience with Linux (CLI)
  • Hands on experience with scripting and programming languages like BASH and Python
  • Solid understanding of, experience with networking (e.g., ports, routing tables, subnets, VPNs, firewalls, routers, etc.) to include design, integration and troubleshooting issues
  • Experience in working on teams utilizing Agile workflows and processes
  • Strong understanding of NIST SP 800-37, NIST SP 800-53, NIST SP 800-160, DISA/CIS STIGs, and Common Vulnerabilities and Exposures (CVEs)
  • Experience with RMF workflow tools
  • Strong communication, organizational, and writing skills.
  • Must be able to clearly and directly articulate their findings and recommendations.
  • Must be open minded to considering alternative approaches to possible security issues noted by other team members

Desired Qualifications

• Relevant IT certifications (e.g., CISSP, AWS Cloud Practitioner, AWS Cloud Security, AI security, etc.)
• Experience working with Infrastructure as Code (IaC) solutions such as Ansible / Terraform, or other configuration and automation tools
• Experience in working in a cloud-based environment (AWS)

FIP

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 10, 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 $107,900.00 - $195,050.00

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.

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.

Securing Your Data

Beware of fake employment opportunities using Leidos’ name. Leidos will never ask you to provide payment-related information during any part of the employment application process (i.e., ask you for money), nor will Leidos ever advance money as part of the hiring process (i.e., send you a check or money order before doing any work). Further, Leidos will only communicate with you through emails that are generated by the Leidos.com automated system - never from free commercial services (e.g., Gmail, Yahoo, Hotmail) or via WhatsApp, Telegram, etc. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at [email protected].

If you believe you are the victim of a scam, contact your local law enforcement and report the incident to the U.S. Federal Trade Commission.

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.