Information System Security Manager Peraton IncInformation System Security ManagerSilver Spring, MD$112,000–$179,000 / year5+ years experience with Authority to Operate (ATO) process, continuous monitoring, POA&Ms, Security Authorizations (SA), NIST 800-37, NIST 800-53 Rev4/ Rev5, working with Information System Owners (ISO) and Program Managers (PM). Continuously maintain a thorough understanding of all relevant corporate policies, security control plans as well as system configurations, architecture, installed software, accounts (both Operating System and Application), data flows, ports, protocols, and other relevant data for each Information System.
Information Systems Security Officer(ISSO) Leidos Holdings IncInformation Systems Security Officer(ISSO)Laurel, MD$107,900–$195,050 / yearWithin Leidos' Cyber & Analytics Business Area, Key Management & Analytics Division, you'll work alongside professionals supporting sophisticated national-security capabilities in areas including Security Engineering, Computer Network Operations (CNO), Mission Software, Signals Intelligence (SIGINT), Cryptographic Key Management, and systems integration. Leidos has an exciting opportunity for an experienced Information Systems Security Officer (ISSO) to join our Cyber & Analytics Business Area, Key Management & Analytics Division, supporting critical national-security missions.
Helpdesk Support (Senior) - Tysons Agil3 Technology Solutions (A3T)Helpdesk Support (Senior) - TysonsTysons, VAYou will participate in a team of highly qualified professionals and interact daily with the customer to ensure productivity and resolve IT issues that the end-users may have with existing desktops, laptops, software installation issues, and other critical needs. Provide PKI Trusted Agent (TA) support; this includes but is not limited to; submitting new token requests, retrieving, issuing tokens, and the collection/turn-in of returned/expired tokens IAW established policies and procedures.
System Administrator Level 2 - (Linux, Unix, Windows) AkinaSystem Administrator Level 2 - (Linux, Unix, Windows)Annapolis Junction, MarylandConfigures and manages Linux, Unix, and Windows operating systems and installs/loads operating system software, troubleshoots, maintains integrity and configures network components along with implementing operating systems enhancements to improve reliability and performance. Configure and manage Linux, Unix, and Windows (or other applicable) operating systems and installs/loads operating system software, troubleshoot, maintain integrity of and configure network components, along with implementing operating systems enhancements to improve reliability and performance.
System Administrator L1 UnisitySystem Administrator L1Annapolis Junction, MarylandConfigures and manages Linux, Unix, and Windows operating systems and installs/loads operating system software, troubleshoot, maintains integrity and configures network components along with implementing operating systems enhancements to improve reliability and performance. Provides support to IT systems including day-to-day operations, monitoring and problem resolution for all of the client/server/storage/network devices, mobile devices, etc.
Sr. System Administrator Themis InsightSr. System AdministratorFort Meade, MDConfigures and manages UNIX and Windows operating systems and installs/loads operating system software, troubleshoots, maintains integrity and configures network components along with implementing operating systems enhancements to improve reliability and performance. Configure and manage UNIX and Windows (or other applicable) operating systems and installs/loads operating system software, troubleshoot, maintain integrity of and configure network components, along with implementing operating systems enhancements to improve reliability and performance.
Principal System Administrator Themis InsightPrincipal System AdministratorFort Meade, MDConfigures and manages UNIX and Windows operating systems and installs/loads operating system software, troubleshoots, maintains integrity and configures network components along with implementing operating systems enhancements to improve reliability and performance. Configure and manage UNIX and Windows (or other applicable) operating systems and installs/loads operating system software, troubleshoot, maintain integrity of and configure network components, along with implementing operating systems enhancements to improve reliability and performance.
System Administrator 2 InterImageSystem Administrator 2Fort Meade, MarylandConfigures and manages UNIX and Windows operating systems and installs/loads operating system software, troubleshoots, maintains integrity and configures network components along with implementing operating systems enhancements to improve reliability and performance. Configure and manage UNIX and Windows (or other applicable) operating systems and installs/loads operating system software, troubleshoot, maintain integrity of and configure network components, along with implementing operating systems enhancements to improve reliability and performance.
System Administrator, Level 2 AvaloreSystem Administrator, Level 2Annapolis Junction, MarylandConfigures and manages UNIX and Windows operating systems and installs/loads operating system software, troubleshoots, maintains integrity and configures network components along with implementing operating systems enhancements to improve reliability and performance. Configure and manage UNIX and Windows (or other applicable) operating systems and installs/loads operating system software, troubleshoot, maintain integrity of and configure network components, along with implementing operating systems enhancements to improve reliability and performance.
System Administrator 2 - (UNIX, Windows, AWS) AkinaSystem Administrator 2 - (UNIX, Windows, AWS)MarylandConfigures and manages UNIX and Windows operating systems and installs/loads operating system software, troubleshoots, maintains integrity and configures network components along with implementing operating systems enhancements to improve reliability and performance. Configure and manage UNIX and Windows operating systems and install/load operating system software, troubleshoot, maintain integrity of and configure network components, along with implementing operating systems enhancements to improve reliability and performance.
SYSTEM ADMINISTRATOR – DevOps/AWS - 10 yrs of Experience - TS/SCI w/Poly clearance is required - TB - 0659 Halogen Engineering GroupSYSTEM ADMINISTRATOR – DevOps/AWS - 10 yrs of Experience - TS/SCI w/Poly clearance is required - TB - 0659Annapolis Junction, Annapolis JunctionConfigures and manages UNIX and Windows operating systems and installs/loads operating system software, troubleshoots, maintains integrity and configures network components along with implementing operating systems enhancements to improve reliability and performance. Provide Tier 1 (Help Desk) and Tier 2 (Escalation) problem identification, diagnosis and resolution of problems (U) Provide support to IT systems including day-to-day operations, monitoring and problem resolution for all of the client/server/storage/network devices, mobile devices, etc.
System Administrator, Level 2 Avalore, LLCSystem Administrator, Level 2Annapolis Junction, MDConfigures and manages UNIX and Windows operating systems and installs/loads operating system software, troubleshoots, maintains integrity and configures network components along with implementing operating systems enhancements to improve reliability and performance. Configure and manage UNIX and Windows (or other applicable) operating systems and installs/loads operating system software, troubleshoot, maintain integrity of and configure network components, along with implementing operating systems enhancements to improve reliability and performance.
System Administrator L3 UnisitySystem Administrator L3Annapolis Junction, MarylandConfigures and manages UNIX and Windows operating systems and installs/loads operating system software, troubleshoots, maintains integrity, and configures network components along with implementing operating systems enhancements to improve reliability and performance. Configure and manage UNIX and Windows (or other applicable) operating systems and installs/loads operating system software, troubleshoot, maintain integrity of and configure network components, along with implementing operating systems enhancements to improve reliability and performance.
Information Systems Security Officer Leidos Holdings IncInformation Systems Security OfficerAshburn, VA$107,900–$195,050 / yearEnsure that assigned systems are operated, maintained, and disposed of in accordance with applicable policies and procedures NIST SP 800-37, Rev 2, Risk Management Framework for Information Systems and Organizations: A System Life Cycle Approach for Security and Privacy, DHS 4300A Policy and Handbook, CBP Information Systems Security Policies and Procedures Handbook (HB 1400-05), and internal CBP (i.e., Office of Information Technology, Security Operations Division, etc.) security policies and practices. Develop, review, maintain, and provide system security documentation for assigned systems, including System Security Plans, Interconnection Security Agreements, Contingency Plans, Plans of Action and Milestones, (POA&M), Waivers, and Exceptions through the DHS FISMA system management tool in use to implement and manage the NIST Risk Management Framework.
Information System Security Professionals ISSO ISSE LeidosInformation System Security Professionals ISSO ISSEAnnapolis Junction, MarylandOur 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. January 5, 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.
Senior Information System Security Officer LeidosSenior Information System Security OfficerAnnapolis Junction, MarylandThe selected candidate will act as an ISSO for a large software development program which includes software maintenance and development, IT support (Network/Workstation/Server), systems integration and life cycle support, enterprise application development, network engineering, and information systems security (ISS). Provide support for Information Assurance Vulnerability Alerts (IAVAs) management (initiating IAVA responses and system security scans, completing remediation, extending IAVA patches and security updates to designated sites, etc.).
Cybersecurity Policy Lead gTANGIBLE CorporationCybersecurity Policy LeadWashington, District of ColumbiaA minimum of 15 years of IT cybersecurity experience, including direct support for the US Government and 7 years serving as a Policy Analyst for an enterprise IT systems OR a relevant Master's Degree in IT, Computer Science, Business, or Engineering and 10 years' of IT cybersecurity experience including direct support for the US Government and 5 years serving as a Policy Analyst . Assist with reviewing and interpreting Executive Orders (EOs), OMB memos, Public Law (PL), DHS directives such as Binding Operational Directives (BODs), DHS Undersecretary Memos, NIST SPs, recommended best practices or other external source documents .
System Administrator Level 2-FFPP-8916 Onyx PointSystem Administrator Level 2-FFPP-8916Hanover, MarylandConfigure and manage UNIX and Windows (or other applicable) operating systems and installs/loads operating system software, troubleshoot, maintain integrity of and configure network components, along with implementing operating systems enhancements to improve reliability and performance. -Provide support to IT systems including day-to-day operations, monitoring and problem resolution for all of the client/server/storage/network devices, mobile devices, etc.
TOC Engineer GD Information TechnologyTOC EngineerBethesda, MarylandAuthor reports, participate in incident review meetings, facilitate active problem management activities, routinely follow up on long-term problems, prepare data for status/findings presentations, prepare flowcharts and draft process documents for team activities. To ensure our employees are able to protect their income, other offerings such as short and long-term disability benefits, life, accidental death and dismemberment, personal accident, critical illness and business travel and accident insurance are provided or available.
Information System Security Professionals Isso Isse Leidos Holdings Inc.Information System Security Professionals Isso IsseFort Meade, MD$131,300–$237,350 / yearOur 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. Apply system security engineering expertise in areas such as system security design, life cycle, risk management, and security testing, using industry system security engineering methodologies.