Information Systems Security Engineer (ISSE)

Description

Leidos has a new and exciting opportunity for a Senior Information Systems Security Engineer (ISSE) in our National Security Sector's (NSS) Cyber & Analytics Business Area (CABA) . Our talented team is at the forefront in Security Engineering, Computer Network Operations (CNO), Mission Software, Analytical Methods and Modeling, Signals Intelligence (SIGINT), and Cryptographic Key Management. At Leidos , we offer competitive benefits , including Paid Time Off, 11 paid Holidays, 401K with a 6% company match and immediate vesting, Flexible Schedules, Discounted Stock Purchase Plans, Technical Upskilling, Education and Training Support, Parental Paid Leave, and much more. Join us and make a difference in National Security!

Job Summary :

As part of this highly visible and fast-paced Leidos prime contract you'll work on a small team that maintains multiple system security plans in a unique and lively customer focused environment. The successful candidate will be part of a team that provides support to multiple organizations from a central location, with no travel requirements. This is an exciting position that supports a mission critical program with high visibility and a proven track record of success.

Don't miss out on this incredible opportunity to take your career to the next level. Apply today and join one of the most dynamic teams in the industry.

Job Responsibilities / Qualifications :

• Mission Focus : Perform reviews such as technical security assessments of customer technical environments to identify points of vulnerability, or non-compliance with standards, and create mitigation plans. Design, develop, and integrate information assurance into security systems and components. Assist with systems engineers and developers with identification and implementation of security functionality to ensure uniform application policies. Apply system security engineering expertise to the design process, life cycle, risk management, testing, and other areas requiring security expertise.
• Technical Proficiency : Provide expert guidance and work product evaluation to security engineers. Interact with customers, IT staff, and stakeholders to define and achieve information assurance objectives. Provide government customer assistance to ensure that the architecture and design of information systems are functional and secure, including program of record and systems and special purpose environments. Review certification and accreditation documentation. Work with up to eight (8) other ISSO and ISSE's within a team environment.
• Qualifications : Twenty (20) years' experience as an ISSE. Bachelor's degree in computer science, Information Assurance, Information Security System engineering, or related discipline from an accredited college or university is required. A master's degree in computer science, information assurance, information security system engineering, or related discipline may be substituted for two (2) years of experience. Four (4) years of additional ISSE experience may be substituted for a bachelor's degree.
• Security Clearance : Active TS / SCI with Polygraph required to be considered for this role.
• Certification Requirement : CISSP-ISSEP

At Leidos, the opportunities are boundless. We challenge our staff with interesting assignments that allow them to thrive professionally and personally. For us, helping you grow your career is good business. We look forward to learning more about you - apply today!

Careers.leidos.com

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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 : November 17, 2025

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 $148,850.00 - $269,075.00

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 .

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.