Leidos' Corporate Information Security Office (CISO), reporting through the Digital Modernization Sector, is seeking an Information System Security Officer (ISSO) to support our Chantilly, VA office.

The Information System Security Officer (ISSO) is the primary Information Assurance (IA) support responsible for the management and technical administration of the Information System (IS) in accordance with internal and external security requirements.  You will be responsible for establishing and maintaining security standards and procedures for assigned information systems and environments. You will conduct periodic reviews to ensure compliance with applicable industry standards and government policies, assess security risks, coordinate with personnel to obtain and maintain Authority to Operate (ATO), and ensure appropriate user access on classified and sensitive systems. In this role you will oversee day-to-day information system security operations at our Chantilly location, resolve complex problems, and develop innovative solutions to meet changing security requirements. You will serve as the Subject Matter Expert (SME) within the Information Assurance technical domain. To be successful, you must demonstrate the ability to work independently as well as with a team of analysts trained in operations research, mathematics, and other skills. You should also be adaptable to diverse office situations, procedures and demands.

Location: All work will be performed onsite at our Chantilly, VA office.

Clearance: You must currently hold an active Top Secret/SCI with Polygraph clearance to qualify for this role.

Primary Responsibilities

• Perform continuous upkeep, monitoring, analysis, and response to Information System, network and security events.

• Document compliance activities in accordance with the governing authority approved authorization package.

• Develop procedures and documentation to ensure compliance with Configuration Management (CM) for security relevant IS software, hardware, and firmware.

• Ensure systems are operated, maintained, and disposed of in accordance with the governing authority approved authorization package and customer directives.

• Ensure records are maintained for workstations, servers, software, routers, firewalls, network switches, and other relevant hardware/equipment throughout the information system's life cycle.

• Evaluate proposed changes or additions to the information system and advises senior site leadership of security relevance.

• Conduct security IS Briefings and training.

• Mentor other engineers in the art of cybersecurity and secure software development practices.

• Participate in internal/external security audits/inspections; performs risk assessments and Continuous Monitoring.

• Lead investigations into computer security violations and incidents, reporting as necessary to both the Facility Security and Senior Program Managers.

• Ensure proper protection and / or corrective measures have been taken when an incident or vulnerability has been discovered.

• Work with the Facility Security Officer (FSO) and CPSOs developing, implements and manages a formal Information Security / Information Systems Security Program.

• Develop, implement and enforce Information Security Policies and Procedures.

• Author, review and update IS Authorization documentation (Body of Evidence) to support IS Assessment and Authorization activities.

Basic Qualifications

• Bachelor's degree and 8 – 12 years related experience in Information Systems, Computer Science or related field or a Master’s with 6 – 10 years of related experience. Additional relevant experience, training, and / or certification may be considered in lieu of degree.

• Currently hold active TS/SCI with Polygraph clearance

• Hold current DoD 8140 IAT II Certification or higher (minimum Security ).

• Detailed understanding of the Risk Management Framework (RMF), NIST, ICD, and CNSS standards.

• Familiarity with network technologies (LAN & WAN) and best practices within a classified environment to include crypto and key management.

• Working knowledge with Microsoft Windows operating systems (workstation & server), Linux, and system virtualization (multiple hypervisors) in a secure network environment.

• Experience with compliance scanning tools (e.g. SCAP) and vulnerability scanning tools (e.g. ACAS/NESSUS).

• Hands on experience with DISA Security Technical Implementation Guide (STIG) implementation and management.

• Experience using Splunk or other event gathering software.

• Must be able to work in a constantly changing regulatory environment with short-, mid-, and long-term timelines for remediating any non-compliance.

• Must be able to work well within a team environment and able to adapt quickly to change.

• Demonstrate strong writing and verbal presentation skills.

• Experience with eMass package submittals, POA&M management and Document SOP updates.

Preferred Qualifications

• DoD IS knowledge and experience.

• Security hardening automation experience.

• Microsoft OS Certification (MCSE Win 11 or other).

• Linux certification (RHCSA, CompTIA Linux, LCFS/LCFE, etc.).

• Understanding of Sensitive Compartmented Information Facility (SCIF) standards.

• Strong knowledge vulnerability/quality scanning tools.

• Knowledge of agile development processes and DevOps tools such as Jira, Bitbucket, Confluence.

• Knowledge of SNOW navigation for IC customers.

• Additional desired certifications include CCNA, CISSP, MCSE, and/or SANS GIAC.

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:

Pay Range:

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.