Senior Information Systems Security Officer (III)

Leidos Holding$107K — $195K *
Information Technology
5 - 7 years of experience
Job Overview by Ladders

Qualifications

  • Bachelor's degree plus 8 years of relevant experience, or master's degree plus 6 years; other combinations of education and experience may be considered.
  • Information Assurance Manager (IAM) Tier 1 certification (Security +, CAP, GSLC) required.
  • Active TS/SCI clearance with Polygraph is mandatory.
  • Strong background in information system security and risk management frameworks (RMF).
  • Excellent written and oral communication skills.

Responsibilities

  • Maintain the operational security posture of the information system.
  • Monitor networks continuously to identify and resolve security non-compliance and vulnerabilities.
  • Implement consistent security processes in support of continuous monitoring.
  • Conduct regular audits of information systems for compliance and security.
  • Assist in preparing information systems for periodic reaccreditation.

Benefits

  • Eligibility for a sign-on bonus of up to $25,000.
  • Paid time off bonus available.
  • Opportunities for skill growth in a fast-paced environment.
  • Engagement in innovative projects involving advanced technology research.
Full Job Description
Job Summary:

Our program provides our customer's Operations organization with the best possible solutions for their mission needs. We achieve this through rapid prototyping, new development, and advanced technology research. From leading-edge visualizations to analytic development, we're always pushing the boundaries to find new and better data sources and tradecraft to answer intelligence questions. With a focus on collaboration and a fast-paced environment, our prototype development program is the ideal place to grow your skills and make a real impact. Click here to learn more about how this program "Delivers Mission Success!"

Seeking a self-starting, motivated individual to be the Senior Information System Security Officer supporting Enterprise Discovery lab with maintaining compliance and strengthening the security posture of critical mission systems via the Risk Management Framework.

Qualified candidates are eligible for enhanced incentives including up to a $25K cash sign on bonus or a paid time off bonus.

Job Responsibilities/Qualifications:
  • Ensure the appropriate operational security posture is maintained for an information system.
  • Support continuous monitoring of networks to detect and correct areas of security non-compliance, unmitigated vulnerabilities, and other risks.
  • Follow consistent security processes and play a role in the information systems continuous monitoring program.
  • Perform regular audits of information systems.
  • Assist the information systems security manager in preparing the information system for periodic reaccreditation.
  • Bachelor's degree plus 8-years of relevant experience or master's degree plus 6-years of relevant experience. An associate's degree or 18 semesters hours of military coursework/training in a computer-related field plus 10-years of relevant experience or high school diploma/GED plus 12-years of relevant experience may be considered. Information Assurance Manager (IAM) Tier 1 certification (Security +, CAP, GSLC).


Security Clearance requirement:
  • Candidates must possess an active TS/SCI with Polygraph to be considered for this role.


Desirable Skills:
  • Experience as an ISSO/ISSE with emphasis on Defense-in-Depth principles, network, and enterprise security architecture.
  • Experience applying the principles of the NIST 800-53 including the procedures in the Risk Management Framework (RMF).
  • Familiarity with STE/STN requirements.
  • Excellent written and oral communication skills.


Original Posting:
August 24, 2026

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 Holding

Leidos Holding Careers

Joining Leidos Holding presents an unparalleled opportunity to advance one's career with a leader in innovation and technology. The company offers a plethora of job opportunities aimed at fostering professional growth and development in a diverse and inclusive environment.

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Leidos Holding is actively seeking skilled professionals who are passionate about leveraging their expertise to drive innovation and leadership in their fields. With a variety of open positions, Leidos Holding provides a platform for individuals to challenge themselves in a dynamic work environment.

Innovation and Professional Growth

At Leidos Holding, innovation is at the core of everything they do. Employees are encouraged to think creatively and push boundaries. The company supports this drive for innovation through comprehensive professional development and diversity training programs that are designed to enhance skills and foster leadership.

Commitment to Diversity and Inclusion

Leidos Holding is committed to creating a workplace where diversity is not only recognized but celebrated. With a culture that values and promotes diversity, Leidos Holding ensures that all team members have the opportunity to contribute, learn, and grow.

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For those starting their career, Leidos Holding offers internship programs that provide a robust foundation in the industry. Internships are a great way to develop essential skills, gain valuable work experience, and build professional networks.

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Employees at Leidos Holding enjoy a range of benefits designed to support their professional and personal lives. The company culture is built on a foundation of respect and integrity, providing a supportive and collaborative environment where every team member is valued.

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Leidos Holding encourages its employees to engage in networking within the company to discover new opportunities for career advancement. The leadership team at Leidos Holding is dedicated to supporting employees in their career paths with ample opportunities for networking and growth.

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Discover the exciting career opportunities at Leidos Holding today. With a commitment to employee growth, innovation, and diversity, Leidos Holding is the perfect place to advance your career. Check out the latest job listings and find your perfect fit at Leidos Holding.

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