ISSO

Posted 2 Days Ago
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Arlington, VA, USA
In-Office
87K-157K Annually
Mid level
Information Technology • Software
The Role
Manage authorization and risk for systems in DISA SAP portfolio. Implement security procedures, develop A&A documentation, validate controls (SSP, STIGs), conduct audits, remediate vulnerabilities, author eMASS submissions, support SDLC security, and coordinate security assessments and training.
Summary Generated by Built In

Leidos' Digital sector is seeking an IA professional to join our team in Arlington, VA - this position is 100% on-site in a secure environment. The ISSO will be responsible for managing the authorizations and risk related to the processing, storage, and transmission of information for one or more programs within the DISA Special Access Program (SAP) portfolio.  The ISSO is responsible for meeting regulatory and non-regulatory compliance (security best practices) demands, providing leadership over security assessment activities, working across system ownership and management organizations to test security controls, policies, and procedures, and participating in and coordinating the support as needed for security assessments and activities.  The ISSO also manages and enforces government and corporate information security policies, provides training, and educates end users and program staff about proper security practices.

Clearance: An active Top Secret/SCI clearance is required to start.

Certification: You must hold a current DoD 8570 IAT II Certification to qualify.

Primary Responsibilities:

  • Establish and implement security procedures and practices in support of Customer goals and current DoD regulations.
  • Develop and update Assessment & Authorization (A&A) documentation (Body of Evidence) for management and continuous monitoring of information systems.
  • Using knowledge of the Information System (IS) and understanding of established Information Assurance (IA) and Cybersecurity requirements validate security policies and procedures outlined in the System Security Plan (SSP), customer policies & regulations, and ensure local policies are followed. 
  • Initiate the authorization or re-authorization efforts and process for new or expiring systems and coordinate, schedule, and attend required meetings
  • Serve as the System Information System Security Officer (ISSO) for various systems
  • Take corrective action to resolve problems identified and ensure systems are operated, maintained, and disposed of in accordance with established policies and procedures.
  • Perform security audits IAW established procedures.  Develop process for the management, review, and retention of security audit data.  Make decisions and implement corrective action as required to resolve audit discrepancies.
  • Author and review IS security-related documentation and submit to Enterprise Mission Assurance Support Service (eMASS).
  • As an IA Subject Matter Expert (SME), provide critical thinking to ensure system security requirements are addressed during all phases of the System Development Life Cycle (SDLC).
  • Conduct ongoing security reviews and tests of systems to verify security features and controls are functional and effective. Take corrective action to resolve identified vulnerabilities.
  • Provide security engineering review of proposed changes or additions to the IS (including hardware, software, or connectivity), and advise the Information System Security Manager (ISSM) of the security relevance.
  • Create and maintain processes and procedures for use by members of the ISSO team
  • Support the ISSO Team Lead in conducting lessons learned activities to improve the overall productivity and efficiency of the ISSO team
  • Communicates with internal team members across multiple areas and customer team members
  • Reviewing manual STIGs (ckls) utilizing STIGViewer
  • Reviewing ACAS Scans
  • Developing Project Management Plan to attain ATO

Qualifications:

  • DoD 8570 IAT Level II Certification
  • BS and 4+ of prior relevant experience, add'l experience may be considered in lieu of degree
  • 2+ years of experience working with eMASS, RMF, and STIGs
  • Active Top Secret/SCI clearance and ability to successfully pass a Polygraph exam
  • Experience with the following systems/platform tool(s): eMASS

Preferred Qualifications:

  • Experience with the following tools: ESS, ACAS, Nessus, Splunk 

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:July 6, 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 $87,100.00 - $157,450.00

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.

Skills Required

  • Active Top Secret/SCI security clearance
  • Ability to successfully pass a Polygraph exam
  • DoD 8570 IAT Level II certification
  • BS degree or equivalent experience (4+ years relevant experience)
  • 4+ years prior relevant experience
  • 2+ years experience with eMASS, RMF, and STIGs
  • Experience reviewing STIGs using STIGViewer and reviewing ACAS scans
  • Experience with ESS, ACAS, Nessus, Splunk

Leidos Compensation & Benefits Highlights

The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Leidos and has not been reviewed or approved by Leidos.

  • Healthcare Strength Healthcare coverage is described as comprehensive, with multiple plan options, low office-visit copays in some plans, and access to mental health and wellness support tools. The availability of HSA/FSA options and employer contributions is positioned as a meaningful part of the total package.
  • Retirement Support Retirement benefits are framed as a strong component of total rewards, highlighted by a 401(k) match and immediate vesting in the standard package. The Employee Stock Purchase Plan is also presented as an additional long-term wealth-building feature.
  • Wellbeing & Lifestyle Benefits Wellbeing and lifestyle supports extend beyond core insurance, including wellness programs, fitness-related stipends, and assistance resources. Work flexibility and related perks are also included as part of the broader rewards experience.

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The Company
HQ: Reston, VA
27,104 Employees
Year Founded: 1969

What We Do

We Are Leidos For 50 years we have been tackling some of the biggest problems that face our nation and our world. OUR MISSION Through our culture of innovation and history of performance, we develop deep customer trust built on integrity and create enduring solutions that improve our world. Leidos is a science and technology solutions leader working to address some of the world’s toughest challenges in the defense, intelligence, homeland security, civil, and healthcare markets. The company’s 43,000 employees support vital missions for government and commercial customers. Headquartered in Reston, Va., Leidos reported annual revenues of approximately $11.09 billion for the fiscal year ended January 3, 2020. Leidos was cited for the meaningful work employees perform that is challenging, impactful, and aligned with our customers’ missions as reasons professionals want to work and stay at our company. Leidos has also been named to lists including Forbes’ Best Employers for Diversity, Forbes’ America’s Best Employers for Women, Military Times Best for Vets Employers, and Ethisphere Institute’s World's Most Ethical Companies®. Employees enjoy career enrichment opportunities available through mobility and development and experience rewarding relationships with supportive supervisors and talented colleagues and customers. Employees appreciate our flexible work environment, allowing for and encouraging a true work-life balance. Our professionals are also excited about our Employee Resource Groups, like the newly launched Collaborative Outreach with Remote and Embedded Employees (CORE), which strives to create an environment where every employee, regardless of location, feels fully engaged as a valued employee of Leidos. Your most important work is ahead.

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