Information Systems Security Engineer

Description

Leidos is seeking a Information Systems Security Engineer (ISSE) to support the United States Space Force (USSF) in the design, development, test, and deployment of defensive cyber capabilities. A successful candidate should have a deep understanding of defensive cyber technologies and policy, the relevant stakeholders and their equities, and be a leader and problem solver with a proven ability to deliver superior results as part of a high performing team in a fast-paced environment.

Primary Responsibilities

• Establish and prioritize requirements for rapid development and fielding of leading defensive cyber capabilities

• Actively engage and collaborate within and across Agile teams to ensure the Sec in DevSecOps.

• Execute or ensure automation of various cybersecurity tests/scans required throughout the DevSecOps CI/CD pipeline.

• Coordinate with model-based systems engineers, cloud architects, and configuration management personnel to ensure cybersecurity requirements are integrated early in design/development phase, and throughout the software development lifecycle.

• Continuously learn and understand cyber threats and threat frameworks (e.g. ATT&CK), and rapidly update requirements and tools to be threat relevant.

Basic Qualifications:

BS degree and 12-15 years of prior relevant experience as an ISSE and cyber security.

• DoD 8140 Qualification Advanced level

• Experience working with or in military defensive cyber stakeholder organizations: primary examples are applicable cyber USSF Combat Forces Command staff or Mission Deltas

• US Citizen

• A Top Secret (TS) security clearance (with SCI and prior SAP is desired).

Preferred Qualifications:

• Technical understanding of current USSF defensive cyber policy, requirements, and capabilities

• Additional experience with Space Systems Command, Space Rapid Capabilities Office, Space Development Agency, Missile Defense Agency, NRO, and any organization/community engaged in deploying Space systems requiring defensive cyber tools

• Familiarity with model-based systems engineering and cloud services and architectures

• Prior military experience with skills applicable to cyber operations

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:February 2, 2026

Pay Range: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.

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 LeidosCareersFraud@leidos.com.

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.