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# Information System Security Office

- **Company:** CareerCircle
- **Location:** Washington, DC, United States
- **Salary:** $107,900.0 - $195,050.0
- **Contract:** Permanent contract
- **Skills:** Xacta, Border Gateway Protocol, Cisco IOS, Configuration Management Databases, Configuration Management, CompTIA Security+, Cyber Security, Computer Networks, Data Transmissions, Disaster Recovery, Hot Standby Router Protocol, Information Security Management, Integrated Development Environments, Multi-protocol Systems, Information Systems Security Architecture Professional, Local Area Networks, Network Layer, Microsoft Security Essentials, Microsoft Visio, Open Shortest Path First (OSPF), Open Systems Interconnection (OSI), Transmission Control Protocol (TCP), Virtual Local Area Networks, Virtual Router Redundancy Protocols, Wide Area Networks, Computer Network Technologies, Juniper, Information Technology, Servicenow, Plan of Action and Milestones
- **Published:** September 3, 2026
- **Apply:** https://www.careercircle.com/jobs/all/all/usa/va/alexandria/7ddad610-6434-4cd8-af18-d76d4bc35f08

## About the Role

Candidates should demonstrate the following:

 * Practical experience understanding and applying ICD-503 Risk Management Framework
 * Experience with XACTA to track, document, and validate accreditation packages
 * Understanding of DoD and IC security policies and mandates
 * Experienced with reviewing existing ATO documentation, identifying missing or outdated information, and coordinating with relevant support teams to obtain necessary information
 * Time management skills
 * Strong oral and written communication skills
 * Track record of working effectively individually, with peers, and with outside support elements
 * Experience with IT Service Management (ITSM) products such as ServiceNow or Remedy.

Clearance Requirement

 * Due to the nature of the government contracts we support, US Citizenship is required.
 * TS/SCI with Polygraph required for Position OR TS/SCI and willingness to obtain and maintain a polygraph.

Education and Experience:

 * Bachelor's degree in a technical field with at least 8 years of prior relevant experience or Masters with 6 years of prior relevant experience. Additional years of experience may be considered in lieu of degree.
 * Candidate must, at a minimum, meet DoDM 8140.03 (previously DoD 8570) - IT System Admin Intermediate certification requirements (Cloud+, GICSP, SSCP, Security+ CE, GSEC, or higher), * Active Certified Information Systems Security Professional (CISSP) or ISACA Certified Information Security Manager (CISM), Ancient History
Asset Management
Operating Systems
Computer Networks
Wide Area Networks
Category 5 Cabling
Data Transmissions
Incident Management
Local Area Networks
Design Specifications
Information Assurance
Valid Driver's License
Border Gateway Protocol
Communications Security
Configuration Management
Hot Standby Router Protocol
Juniper Network Technologies
Open Systems Interconnection
Brocade Network Technologies
Multiprotocol Label Switching
Open Shortest Path First (OSPF)
Troubleshooting (Problem Solving)
Virtual Local Area Network (VLAN)
Virtual Router Redundancy Protocols
Transmission Control Protocol (TCP)

## Description

Writing
ICD 503
Equities
Operations
Leadership
Management
Innovation
ServiceNow
Market Data
Coordinating
Communication
Due Diligence
Cyber Security
CompTIA Cloud+
Risk Management
Ancient History
Operational Risk
System Lifecycle
Security Controls
Security Policies
Disaster Recovery
Industry Standards
Process Improvement
GIAC Certifications
CompTIA Security+ CE
IT Service Management
System Administration
Concept Of Operations
Development Environment
Risk Management Framework
Customer Success Management
Information Systems Security
Common Criteria (IT Framework)
Configuration Management Databases
Plan Of Action And Milestones (POA&M)
Certified Information Security Manager
Systems Security Certified Practitioner
GIAC Security Essentials Certification (GSEC)
GIAC Global Industrial Cyber Security Professional
Certified Information Systems Security Professional
Top Secret-Sensitive Compartmented Information (TS/SCI Clearance), Leidos is seeking an Information System Security Office (ISSO) to support a large enterprise IT contract for the DOD. The ISSO will be responsible for reviewing and maintaining existing Authority to Operate (ATO) documentation throughout the sustainment portion of the system lifecycle. They will utilize the XACTA system to update documentation in the Risk Management Framework (RMF) System Security Package (SSP), verify systems are operating in their intended manner, and validate administrator permissions and access to systems under their purview
This role requires an individual that is familiar with security accreditation frameworks and directives (e.g. NIST, RMF, Common Criteria, DoD, and Intelligence Community Directives (ICDs)) and works to mitigate risks by applying security controls effectively to maintain an acceptable degree of operational risk across multiple enclaves in an enterprise environment. The ISSO will promote security best practices, identify and articulate process improvement and procedures updates, and conduct testing and assessments to sustain required accreditations. Additionally, the ISSO
will assist with tracking, documenting, and remediating vulnerabilities identified by the customer's Cyber Security division and direct remediation efforts for system administrator staff, provide status updates to government and program leadership, and update relevant RMF packages as required.

Primary Tasks

 * Author, review, and update accreditation packages and supporting documentation to maintain existing ATO state for all systems operating in the production environment that follow all government, IC, DoD, DISA, NIST, or industry standards and policies
 * Review documentation provided by the customer's Engineering division as part of the initial ATO package to validate all documents are available and useable in their current state
 * Maintain SSPs and related configuration records in customer's XACTA system and Service Now or other CMDB tool
 * Develop, monitor, and update Plan of Action & Milestones (POA&Ms) to document open risks and vulnerabilities through remediation or mitigate
 * Can work independently as well as collaboratively to drive security process improvements to streamline the process, increase the security posture of the enterprise, and ensure due diligence at all times
 * Comfortable communicating officially and unofficially via briefings, meetings, emails, or other collaboration technologies, with Leidos program leadership and government leadership
 * Has in-depth understanding of information security technical principles, theories, concepts and their application across a range of enterprise services and systems
 * Coordinates all A&A renewal activities with the DAO, DAOR, or other representatives from the Cyber Security division to maintain proper accreditation throughout the life of the system
 * Review, update, and maintain CONOPs, Disaster Recovery, and other required plans for each system to reflect the evolving enterprise
 * Coordinate with System Administrators and other operations and engineering staff to remediate all vulnerabilities and report results to the Cyber Security division.
 * Document, track, and obtain approvals for open vulnerabilities that cannot be remediated through the use of POA&Ms, Risk Acceptance requests, or other customer-mandated processes and forms
 * Mentor coworkers, system administrators, program and government leadership on evolving security best practices and potential impacts on production systems, Foundry
Equities
Topology
Cisco IOS
Operations
ServiceNow
Market Data
Network Layer
Microsoft Visio


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