Senior Information Systems Security Officer ISSO

Leidos LLC; College Park (MD); On-site; USD 131,000 - 237,000; Full time

Benefits offered by this job

Sign-on bonus

Paid Time Off

401(k) matching

Education and training support

Job summary

Leidos is seeking a Senior Information Systems Security Officer (ISSO) to secure and sustain large-scale collection systems for a multi-year program at the Annapolis Junction, MD site.

The ideal candidate has 12+ years of relevant experience, DoD RMF expertise, and active TS/SCI with Polygraph. The role offers a competitive benefits package including paid time off and a 15k sign-on bonus.

Qualifications

• Bachelor of Science degree in Computer Science, Information Assurance, Information Security, or a related discipline, plus 12+ years of relevant experience.
• DoD 8570 compliance with IAM Level II or IAT Level III (CASP, CISSP, or Associate).
• Active TS/SCI with Polygraph required.

Responsibilities

• Enhance security posture by supporting information assurance initiatives and enforcing security policies, standards, and methodologies.
• Oversee security operations for information systems and conduct vulnerability and risk assessments for accreditation.
• Manage configuration and system integrity, including CM for security software, hardware, and firmware, ensuring compliance with security controls.

Skills

ISSO experience

Security policy enforcement

Security compliance

Education

Bachelor of Science in Computer Science or related field

Tools

RMF

SSP / A&A packages

Job description

Leidos has a new and exciting opportunity for a Senior Information Systems Security Officer (ISSO) in our Intelligence Sector, 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 Leidos Pay and Benefits, including 4 or more weeks 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! This position is eligible for a 15k sign on bonus! Job Summary: The Senior ISSO plays a vital role in securing and maintaining the integrity of our information systems through robust security measures and compliance frameworks. This multi-year, high-impact program supports our customer site in Annapolis Junction, MD, focusing on the development, integration, deployment, and sustainment of cutting-edge large-scale collection systems. As part of this mission-critical contract, you will have the opportunity to work independently, innovate with emerging technologies, and contribute directly to national security. If you're passionate about solving complex security challenges and making a tangible impact, this is the role for you. Your greatest work is ahead!

Responsibilities Include:

• Enhancing security posture by supporting the program, organization, system, or enclave’s information assurance initiatives and enforcing security policies, standards, and methodologies.
• Overseeing security operations for information systems, managing daily security aspects, evaluating security solutions for classified processing, and conducting vulnerability and risk assessments for accreditation.
• Managing configuration and system integrity by administering configuration management (CM) for security software, hardware, and firmware, ensuring compliance with security controls, and assessing the impact of system changes.
• Developing and maintaining security documentation, including System Security Plans (SSPs), Risk Assessment Reports, Certification & Accreditation (C&A) packages, and System Requirements Traceability Matrices (SRTMs).
• Ensuring compliance with security authorization activities following the Information System Certification and Accreditation Process (NISCAP) and DoD Risk Management Framework (RMF).
• Providing technical expertise in security policies and operations, supporting the implementation and maintenance of security measures, and collaborating with stakeholders to strengthen the security posture.
• Driving continuous improvement by assessing existing security processes, identifying vulnerabilities, and implementing proactive solutions to enhance system resilience.

Basic Qualifications:

• Bachelor of Science degree in Computer Science, Information Assurance, Information Security, or a related discipline, plus 12+ years of relevant experience.
• In lieu of a degree, an additional 4 years of experience may be considered on a case by case basis.

Industry Expertise:

7+ years of ISSO experience supporting IC or DoD programs and contracts of similar scope, type, and complexity.

Experience with customer Info Security tool suite Certifications & Compliance:

• DoD 8570 compliance with IAM Level II or IAT Level III (CASP, CISSP, or Associate).

Clearance Requirement:

• Must hold an active TS/SCI with Polygraph.

KQW conmd 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: August 5, 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 $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.

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 $17.2 billion for the fiscal year ended January 2, 2026. 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 here.

Securing Your Data Leidos will never ask you to provide payment-related information at any part of the employment application process. And Leidos will communicate with you only through emails that are sent from a Leidos.com email address. If you receive an email purporting to be from Leidos that asks for payment-related information or any other personal information, please report the email to [e-mail].

Commitment and Diversity All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, 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.