ISSO/ISSE

Leidos; United States; Remote; USD 108,000 - 195,000; Full time

Job summary

Leidos is seeking an ISSO/ISSE for the DHMSM program to support RMF authorization, sustainment, and cybersecurity documentation. This remote US-based role requires US citizenship and a Secret clearance, with responsibilities across ATOs, policy creation, and risk management.

The candidate will collaborate with Cybersecurity Leads, LPDH partners, and CyberOps to maintain RMF records, ensure authorization readiness, and support DoW security processes and cloud/containers environments.

Qualifications

• BS degree and 8-12 years of prior relevant experience.
• US Citizen with Active Secret Clearance or higher – required.
• Minimum of 5 years’ hands-on experience on Defense Health Agency projects in a cybersecurity role.
• DoW 8570 Certification.
• Proficiency in eMASS.
• Experience with DoW Accreditation and tools such as eMASS, ACAS, CMRS and HBSS.
• Knowledge of networks, cyber defense toolsets and processes.
• Strong written and verbal communication skills.

Responsibilities

• Maintaining RMF Authorizations for all assigned ATOs and related activities.
• Primary cybersecurity review of system architecture and artifacts.
• Developing and updating cybersecurity policies and documentation.
• Ensuring systems meet authorization requirements (ATO/ASR) from the AO.
• Understanding DHMHS RMF policies and keeping up with changes.
• Assisting with development of templates and tools for risk management and ATO activities.
• Coordinating with CyberOps to resolve scan issues and track remediation.
• Developing POA&Ms and tracking closures for DHA requirements.
• Evaluating effectiveness of RMF assessment procedures.
• Supporting cybersecurity compliance assessments and documentation.

Skills

RMF knowledge

Cybersecurity policy

Security documentation

Strong communication

Education

BS degree

Tools

eMASS

ACAS

CMRS

HBSS

NESSUS

SCAP

Cloud

Containers

PowerShell

Python

Shell scripting

Job description

The DoW Healthcare Management System Modernization (DHMSM) Program is looking for an experienced ISSO/ISSE to join our cyber team in support of the continued development, sustainment, and deployment of the Military Health System (MHS) GENESIS system. MHS GENESIS is deployed globally to over 3700 locations at 138 Medical Treatment Facilities (MTFs), serving 190K users, providing 1100+ clinical workflows delivering medical electronic health record (EHR) capabilities for nearly 10M beneficiaries. US Citizenship and ability to obtain a Secret clearance. This is a remote role that requires that work to be completed within the United States.

WHAT YOU WILL BE DOING

The ISSO supports the Cybersecurity Leads with all Risk Management Framework (RMF) Authorization and Sustainment related functions to include Interim Authorization to Test (IATT), Authority to Operate (ATO), Annual Security Review (ASR), Risk Assessment (RA) and Continuous Monitoring (ConMon) activities for all assigned systems.

Responsibilities include, but are not limited to, the following:

• Maintaining RMF Authorizations for all assigned ATOs including any required IATT, ATO, ASR, RA and ConMon related activities and assisting team members with unassigned ATOs as required.
• Primary cybersecurity review of system architecture and technical artifacts (to include PPSM, diagrams, STIGs, compliance evidence, and policy documentation)
• Developing, updating and working with Cybersecurity Leads and LPDH partners to ensure implementation of cybersecurity policies and procedures, and developing any other required cybersecurity related documentation.
• Ensuring assigned systems meet requirements to obtain required authorizations and approvals including IATT, ATO, and ASRs from the assigned Authorizing Official (AO)
• Understanding all DOW and DHA RMF policies, procedures, and guidance and keeping up with all changes.
• Ensuring eMASS record is maintained in accordance with DHMHSM and DHA requirements.
• Assisting with the development of templates and recommending other tools to support risk management and ATO activities, as needed.
• Working with CyberOps to ensure all assets are scanned properly and that any scan issues are resolved in a timely manner.
• Tracking all issues.
• Developing and Maintaining Plans of Action and Milestones (POA&Ms) and Risk Acceptances for all assigned ATOs and ensuring POA&M received from other teams meet all DHA requirements.
• Tracking vulnerability remediation statuses and POA&M closures on a weekly basis for metrics reporting.
• Periodically evaluating the effectiveness of all Assessment Procedures for RMF security controls to ensure operational security posture is maintained.
• Supporting cybersecurity compliance assessment efforts by providing systems engineering and documentation support.
• Ensuring all DoW and DHA cybersecurity-related documentation is current and accessible to properly authorized individuals.
• Assisting Cybersecurity Leads in ensuring the project meets identified milestones and requirements.
• Contributing to the development of cyber strategies and any associated documentation.
• Ensure all users have requisite security clearances and access authorization.
• Provide Subject Matter Expertise for customer inquiries.

FACTORS FOR SUCCESS

• BS degree and 8-12 years of prior relevant experience
• US Citizen with Active Secret Clearance or higher – required. Contract requirement.
• Minimum of 5 years’ hands‑on experience on Defense Health Agency projects in a cybersecurity role.
• DoW 8570 Certification
• Proficiency in eMASS
• Prior experience with DoW Accreditation and tools such as eMASS, ACAS, CMRS and HBSS
• Knowledge of networks, cyber defense toolsets and processes.
• Strong understanding of related technologies and significant knowledge of networking technologies, operating systems, and security tools, tactics, techniques, and procedures.
• Attention to detail
• Excellent written and verbal communication skills and the ability to effectively interact and work with internal team members, vendors and clients.
• Experience with network and network security assessments and documenting the results using NIST SP 800-53A (Rev 5), completing security plans and recommending Security Controls for Federal Information Systems
• Strong ability to document recommendations to correct security weaknesses resulting from security assessments and tracking implementation of corrective actions
• Experience developing network and network security policies and system security documentation and procedures
• Experience with DoW Information Assurance Vulnerability Management (IAVM) Program
• Experience with Cloud
• Experience with Containers
• Scripting knowledge: PowerShell, Python, Shell Scripting

HOW YOU WILL STAND OUT FROM THE CROWD

• PMP Certification
• A high degree of proficiency in eMASS DHA A&A Experience
• Proficiency in ACAS/NESSUS, SCAP
• Experience with Cloud
• Experience with ContainersExperience with the DoW Information Assurance Vulnerability Management (IAVM) Program

Original Posting: October 19, 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 $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.

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, 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.