June 17, 2026For 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. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at LeidosCareersFraud@leidos.com.
June 18, 2026For 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. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at LeidosCareersFraud@leidos.com.
Annapolis Junction, MD10 days ago
March 16, 2026For 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. The selected individual will lead all security engineering efforts for a large, complex network environment with geographically distributed systems; and will manage a team of Information Systems Security Officers (ISSOs) and Information Systems Security Engineers (ISSEs), providing technical leadership and direction to meet program requirements.
Aberdeen Proving Ground, MD12 days ago
Attend and provide classified and unclassified IA and cybersecurity support at PM PNT IPT meetings, working groups, PNT forums, and technical reviews, including SSR, SRR, system functional review, PDR, CDR, PRR, FCA, and PCA events. Plan, create, review, coordinate, and maintain classified and unclassified PM PNT IA and cybersecurity acquisition documentation, including Cybersecurity Strategy, Clinger-Cohen Act documentation, SEP, TEMP, and acquisition strategy updates.
Our capabilities range from C5ISR, AI and Big Data, cyber operations and synthetic training environments to fleet sustainment, environmental remediation and the largest family of unmanned underwater vehicles in every class. Our workforce includes skilled tradespeople; artificial intelligence, machine learning (AI/ML) experts; engineers; technologists; scientists; logistics experts; and business administration professionals.
The incumbent directs cybersecurity operations, security monitoring, threat assessment, incident response, cyber continuity planning, and resiliency initiatives across on-premises, cloud, and externally hosted environments supporting County applications, infrastructure, communications, endpoints, and data systems. OIT will provide leadership, expertise, and resources in the ideation, development, and deployment of innovative technologies and streamlined processes to improve government efficiency, business interaction, and citizen access to government information and services.
Aberdeen Proving Ground, MD11 days ago
As an ISSO/ISSE supporting the Capability Program Executive for Chemical, Biological, Radiological and Nuclear Defense (CPE‑CBRND), you will play a critical role in safeguarding systems that enable warfighters to operate safely in contested CBRN environments. Pay Range:
There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications.
p>Background: The Department of Information Technology (DoIT) Office of Security Management (OSM) is requiring the services of Information Security Officer (ISO) to support OSM in coordinating the adoption and implementation of centrally provided cyber security services. The Information Security Officer (ISO) will play an active role in integrating DoIT managed services and providing tailored cybersecurity consultation to meet the unique mission needs of various agencies.
The Senior ISSO will maintain network device and information security incident, damage, and threat assessment programs for classified systems and investigate network device and information security incidents to determine the extent of compromise to national security information and automated information systems. The position involves creating and maintaining Configuration Management Plans, Contingency Plans, and Incident Response Plans for classified environments, as well as conducting Risk Assessments, annual security assessments, and vulnerability assessments for both classified and unclassified systems.
Aberdeen Proving Ground, Maryland12 days ago
As an ISSO/ISSE supporting the Capability Program Executive for Chemical, Biological, Radiological and Nuclear Defense (CPE‑CBRND), you will play a critical role in safeguarding systems that enable warfighters to operate safely in contested CBRN environments. Pay Range: There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications.
National Harbor, Maryland19 days ago
The Senior ISSO will maintain network device and information security incident, damage, and threat assessment programs for classified systems and investigate network device and information security incidents to determine the extent of compromise to national security information and automated information systems. The position involves creating and maintaining Configuration Management Plans, Contingency Plans, and Incident Response Plans for classified environments, as well as conducting Risk Assessments, annual security assessments, and vulnerability assessments for both classified and unclassified systems.
There are differentiating factors that can impact a final salary/hourly rate, including, but not limited to, Contract Wage Determination, relevant work experience, skills and competencies that align to the specified role, geographic location (For Remote Opportunities), education and certifications as well as Federal Government Contract Labor categories. As an ISSO, you will work alongside customers, Integrated Product Teams (IPTs), and vendors to support the implementation and compliance of advanced EIT capabilities through Data Center & Compute Services.
Annapolis, MD30+ days ago
Full Name: Degree Major with University and Completion Year: Do you have an active TS/SCI clearance with CI Polygraph? (Yes/No – provide details): Do you have an active Security+ or IAT II/III certification? (Yes/No – provide details): Total Years of Experience in Cybersecurity / ISSO / RMF roles: Do you have experience working as an ISSO or ISSE?
p>Pay Range: There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications. We are seeking an experienced Information System Security Officer (ISSO) to help protect, maintain, and strengthen the security posture of complex systems that support high‑priority intelligence programs.
Linthicum, Maryland30+ days ago
ul>Experience with – H/W inventory and change log updates; System personnel & change log updates for Security Relevant Changes (SRC); STE/STN Activities; System Owner updates. Responsibilities: Peraton is hiring a Part-timeEnterprise Infrastructure Services Information Systems Security Officer (ISSO) to join our Cyber Mission business unit in Fort Meade, Maryland.
Laurel, Maryland30+ days ago
div class="content">Information Assurance, IAVA, System Security Plans (SSPs), RMF, Windows, Linux, Authorization to Operate, Verification and Validation, Security+, Security X, CASP+, NIST 800-53
Due to federal contract requirements, United States citizenship and an active TS/SCI security clearance and polygraph are required for the position.
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These Qualifications Would Be Nice to Have: - Extensive experience as an Information Systems Security Officer on large software development and integration programs.
p>Pay Range: There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications.
The Opportunity:
Join CACI as a Systems Engineer with an Information Systems Security Officer (ISSO) focus, where you will play a key role in ensuring the security, integrity, and reliability of mission‑critical systems.
Linthicum, Maryland30+ days ago
li>Working understanding of network technology (includes knowledge of network protocols, TCP/IP), operating systems as well as the necessary security protocols, system details (Architecture, data flow, security cat, requirements, configuration management process/procedures, and user profile) firewalls, rules and configurations, intrusion detection tools and prevention systems, encryption techniques, Windows, Unix, and Linux) operating systems, along with other applications such as databases and web servers. The successful candidate will be responsible for ensuring the implementation and maintenance of security controls in accordance with RMF v5, managing ATO packages, drafting security documentation including Operating Procedures, Cybersecurity Strategy (CSS), System Security Plans (SSP) ATO packages as well as System Security and Privacy Plan (SSPP) in accordance with DoD policies, Department of Airforce (DAF) regulations and our Federal Government customer's guidance.
Laurel, Maryland30+ days ago
Responsibilities: Peraton Labs is seeking a poly cleared Information System Security Officerfor a mission-critical, highly complex HPC environment enabling research across multiple security domains. You will own day-to-day security operations aligned to RMF, drive continuous monitoring, maintain ATO posture, and partner closely with subcontractor and customer personnel to ensure implementation and compliance.
As an ISSO, you will work alongside customers, Integrated Product Teams (IPTs), and vendors to support the implementation and compliance of advanced EIT capabilities through Data Center & Compute Services. + Bachelor’s degree with 12+ years of relevant experience OR associate’s degree with 15 years of relevant experience OR high school diploma/GED with 20 years of relevant experience.
This role works closely with system owners, administrators, and the Information System Security Manager (ISSM) to ensure systems remain compliant throughout their lifecycle. Key Responsibilities: Support and execute Risk Management Framework (RMF) activities (Categorize through Assess, with exposure to Authorize/Monitor) for DoD systems.
You will own day-to-day security operations aligned to RMF, drive continuous monitoring, maintain ATO posture, and partner closely with subcontractor and customer personnel to ensure implementation and compliance. As the worlds leading mission capability integrator and transformative enterprise IT provider, we deliver trusted, highly differentiated solutions and technologies to protect our nation and allies.
Annapolis Junction, MD30+ days ago
If you have prior military service or government contracting experience, are proud to serve and support our nation, and want to help support ProSync's mission to "Define and Redefine the State of Possible,” please apply today! ProSync Technology Group, LLC (ProSync) is an award-winning, SDVOSB Defense Contracting company with a strong military heritage and a record of excellence in supporting the Department of Defense and the Intelligence Community.
p>Seeking a self-starting, motivated individual to be an Information System Security Officer supporting Signals Analysis Division with maintaining compliance and strengthening the security posture of critical mission systems via the Risk Management Framework; will be responsible for 8-10 System Security Plans (SSPs). An associate's degree or 18 semesters hours of military coursework/training in a computer-related field plus 7-years of relevant experience or high school diploma/GED plus 9-years of relevant experience may be considered.
Columbia, Maryland30+ days ago
p>Pay Range: There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications. We are seeking an experienced Information System Security Officer (ISSO) to help protect, maintain, and strengthen the security posture of complex systems that support high‑priority intelligence programs.
Annapolis Junction, Maryland30+ days ago
Relevant experience in information or cyber security, network security, vulnerability analysis, penetration testing, computer forensics, systems engineering, or network/system administration. Combining operational expertise with an intimate understanding of today’s greatest challenges, we bring our customers the solutions required for success in a complex and multidimensional world.
Laurel, Maryland30+ days ago
Responsibilities: Peraton Labs is seeking a poly cleared Senior Information System Security Officerfor a mission-critical, highly complex HPC environment enabling research across multiple security domains. Peraton Overview:
Peraton is a next-generation national security company that drives missions of consequence spanning the globe and extending to the farthest reaches of the galaxy.
Annapolis Junction, Maryland19 days ago
Overview: 
Senior Information System Security Officer. You’ll shape and maintain the security posture of diverse platforms, guiding secure development practices, assessing risks, monitoring vulnerabilities, and driving remediation strategies that protect sensitive data and critical workflows.
Fort Meade, MD30+ days ago
Perform certification assessments for assigned programs to include review of change requests; review of ports, protocols, and services; whitelist requests; self-assessments results; statements of compliance; scan and STIG reviews; systems security plans; cybersecurity control evidence and artifacts; and on-site review results. Semper Valens Solutions, Inc. (SVS) is a Service-Disabled Veteran Owned Small Business (SDVOSB) providing Cost Effective Software and Systems Engineering, Field Support, Training and Full Life cycle Support Management to the DOD and VA community.
In terms of professional development, Everforth Apex hosts an on-demand training program, provides access to certification prep and a library of technical and leadership courses/books/seminars once you have 6+ months of tenure, and certification discounts and other perks to associations that include CompTIA and IIBA. Must hold at least one of the following IAT Level III qualifications: Certified Information System Security Professional (CISSP), CompTIA Advanced Security Practitioner (CASP+), or other applicable IAT or IAM cybersecurity professional certifications.
Fort Meade, Maryland17 days ago
p>Pay Range: There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications.
Join CACI as a Systems Engineer with an Information Systems Security Officer (ISSO) focus, where you will play a key role in ensuring the security, integrity, and reliability of mission‑critical systems.
As an ISSO, you will work alongside customers, Integrated Product Teams (IPTs), and vendors to support the implementation and compliance of advanced EIT capabilities through Data Center & Compute Services. + Bachelor’s degree with 12+ years of relevant experience OR associate’s degree with 15 years of relevant experience OR high school diploma/GED with 20 years of relevant experience.
p>Peraton Labs is seeking a poly cleared Senior Information System Security Officer for a mission-critical, highly complex HPC environment enabling research across multiple security domains. As the world's leading mission capability integrator and transformative enterprise IT provider, we deliver trusted, highly differentiated solutions and technologies to protect our nation and allies.
Fort Meade, Maryland30+ days ago
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.
The benefits package:
• Affordable healthcare options with 80% employer paid premium PLUS a company-funded HSA
• Dental insurance with 100% employer paid premium
• Vision with 80% employer paid premium
• Employer paid Life insurance 100%
• Employer paid Short-term and Long-term disability 100%
• Annual training, continued education, and professional memberships reimbursement
• Unlimited access to Red Hat Enterprise Linux, AWS, and NetApp training and accreditation
• Annual reimbursement for technology i.e. phones, computers, printers, etc. Team building events throughout the year such as Destination Family Events, Holiday Party, Monthly Get-Togethers
• Leadership Team engagement and mentorship
• Performance Recognition Program
• Complimentary branded apparel
Don't see a job opening that's the perfect fit?
Our talented team is at the forefront in Security Engineering, Computer Network Operations (CNO), Mission Software, Analytical Methods and Modeling, Signals Intelligence (SIGINT), and Cryptographic Key Management. This multi-year, high-impact program supports our customer site in Annapolis Junction, MD, focusing on the development, integration, deployment, and sustainment of cutting-edge large-scale collection systems.
Gaithersburg, MD17 days ago
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, providing program management support, team leadership, and participating in and coordinating the support as needed for security assessment 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. The ISSO conducts security and risk assessments as required using a range of security accreditation frameworks (e.g., NIST, RMF, Common Criteria, DoD, the Intelligence Community Directives (ICDs)), and works to mitigate risks by applying security controls effectively to achieve an acceptable degree of operational risk.
Our talented team is at the forefront in Security Engineering, Computer Network Operations (CNO), Mission Software, Analytical Methods and Modeling, Signals Intelligence (SIGINT), and Cryptographic Key Management. This multi-year, high-impact program supports our customer site in Annapolis Junction, MD, focusing on the development, integration, deployment, and sustainment of cutting-edge large-scale collection systems.
p>Desired Qualifications:
Fort Meade, Maryland11 days ago
ZTI Solutions is seeking an Information System Security Officer (ISSO) to support the cybersecurity and Risk Management Framework (RMF) program for a multinational IL5/IL6 collaboration effort in an operational Department of War (DoW) environment hosting multiple Coalition Mission Partner Environments (MPE). The ISSO executes the day-to-day RMF and continuous monitoring activities, maintains system security documentation, tracks vulnerabilities and POA&Ms, and ensures assigned systems remain compliant and operationally secure.
Aberdeen Proving Ground, Maryland27 days ago
p style="margin:0px">The Nakupuna Companies use a market-based compensation strategy to ensure that our employees are compensated within applicable market ranges commensurate with multiple factors, including but not limited to the individual’s particular combination of education, knowledge, skills, competencies, and experience, as well as contract-specific affordability, organizational requirements, and position location. Overview: Nakupuna Prime is seeking a Cybersecurity Information System Security Officer (ISSO) to support the U.S. Army Combat Capabilities Development Command (DEVCOM) Artificial Intelligence Integration Center (AI2C).
Annapolis Junction, Maryland30+ days ago
p style="margin: 0px 0px 10.6667px; padding: 0px; color: windowtext;">In this role, you’ll closely impact the Department of Defense (DoD) by supporting our country. With mentoring, challenging hands-on problem-solving, and opportunities to learn new tools and skills, we focus on growing as a team to make the best solutions for our customers. - Perform risk and vulnerability assessments in network, system, and application areas; leverage big data analytics and traditional security event types to identify advanced threats or indicators of compromise.
li>Relevant experience in information or cyber security, network security, vulnerability analysis, penetration testing, computer forensics, systems engineering, or network/system administration. Combining operational expertise with an intimate understanding of today's greatest challenges, we bring our customers the solutions required for success in a complex and multidimensional world.
li>Working understanding of network technology (includes knowledge of network protocols, TCP/IP), operating systems as well as the necessary security protocols, system details (Architecture, data flow, security cat, requirements, configuration management process/procedures, and user profile) firewalls, rules and configurations, intrusion detection tools and prevention systems, encryption techniques, Windows, Unix, and Linux) operating systems, along with other applications such as databases and web servers. The successful candidate will be responsible for ensuring the implementation and maintenance of security controls in accordance with RMF v5, managing ATO packages, drafting security documentation including Operating Procedures, Cybersecurity Strategy (CSS), System Security Plans (SSP) ATO packages as well as System Security and Privacy Plan (SSPP) in accordance with DoD policies, Department of Airforce (DAF) regulations and our Federal Government customer''s guidance.
The ideal candidate will be confident writing Security Test Procedures (STPs), building Security Controls Traceability Matrices (SCTMs), interpreting ACAS/Nessus scan results, and using Splunk to verify control effectiveness. We are seeking a highly skilled and technically proficient Information Systems Security Officer (ISSO) with hands-on experience developing, implementing, and validating security controls within DoD RMF environments.
Patuxent River, MD30+ days ago
p>RMC is hiring an Information Security Analyst for the role of Information Security Systems Officer (ISSO) to support our NAVAIR customer in Patuxent River, MD. The selected applicant will perform a variety of Information Assurance and Risk Management Framework (RMF) activities, including but not limited to: - Serving as a Lead ISSO for a designated NAVAIR program.
- Performing vulnerability assessments and system authorization activities through collaboration with SMEs (System Administrators, Network Admins, Lab Managers, Program Managers, and ISSMs).
Annapolis Junction, Maryland5 days ago
With a shared desire to give back, grow the community, and do great work, the Set of X team is building an elite group of engineers with a strong sense of shared responsibility and ownership. For a full overview of our benefits, please visit our benefits tab.
Annapolis Junction, MD30+ days ago
Direct Experience: 10+ years of in-depth experience as ISSO or combination of ISSO and other security related role supporting IC or DoD programs and contracts of similar scope, type, and complexity. Bachelor of Science degree in Computer Science, Information Assurance, Information Security, or a related discipline, plus 12+ years of relevant experience.
Annapolis Junction, Maryland30+ days ago
div>Active TS/SCI w/ Polygraph required.
Required Skills:
- Bachelor of Science degree in Computer Science, Information Assurance, Information Security, or a related discipline, plus 12+ years of relevant experience.
Serving Maryland and the Greater Washington D.C. area, SageCor Solutions (SageCor) is a growing company bringing complete engineering services and true full lifecycle System Engineering services to areas requiring (or desiring) nationally-recognized expertise in high performance computing, large data analytics and cutting edge information technologies.
Rockville, MD30+ days ago
p>Information Systems Security Officer ISSOBaltimore MD Remote Hybrid Rockville MDInformation Technology Full Time Hybrid Hybridapply for this jobISSOEmployment Type Full-Time ExperiencedDepartment Information TechnologyCGS is seeking an Information Systems Security Officer ISSO with DIACAP andor RMF experience who has deep expertise in security assessment documentation to support Dept. Join our team and become part of government innovationExplore additional job opportunities with CGS on our Job Boardhttpscgsfederal.comjoin-our-teamFor more information about CGS please visit httpswww.cgsfederal.com or contactEmail emailprotectedCJ92213.33