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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Firewall - **Company:** CareerCircle - **Location:** Fort Meade, MD, United States (Remote available) - **Experience:** Expert - **Salary:** $107,900.0 - $195,050.0 - **Contract:** Permanent contract - **Skills:** Microsoft Access, Microsoft Excel, Microsoft Windows, Data Analysis, Application Layers, User Authentication, Microsoft Outlook, Network Analysis, Configuration Management, Signals Intelligence, Communications Protocols, Cyber Security, Information Systems, Computer Networks, Firmware, Hardware Security Module, Identity and Access Management, Information Security Management, IP Addressing, Intrusion Detection and Prevention, Key Management, Knowledge Management, Microsoft Office, Microsoft Servers, Windows Servers, NetFlow, Network Monitoring, Packet Analyzer, Open Source Intelligence, Open Systems Interconnection (OSI), Peering, Software Maintenance, ArcSight SIEM Tool, Software Engineering, Software Requirements Analysis, Software Systems, System Software, Systems Integration, Wireshark, Software Vulnerability Management, Windows Desktop, Network Switches, Network Routing, Network Routers, Data Processing, Computer Networking Systems, Computer Network Operations, Software Security, Mitre Att&ck, Virtual Environment, Malware, Cyber Threat Analysis, Firewalls (Computer Science), Information Technology, Cyber Warfare, Network Server, User Identification, Servicenow - **Published:** August 14, 2026 - **Apply:** https://www.careercircle.com/jobs/all/all/usa/md/laurel/7b7bbed6-c713-4ac3-bfa0-bc6a131daca7 ## About the Role This position requires an experienced cybersecurity professional with demonstrated Information Systems Security Officer experience supporting programs and contracts of comparable scope, type, and complexity., * Bachelor's degree in Computer Science or a related discipline from an accredited college or university. In lieu of degree, 4 years of direct experience as an ISSO may be substituted. * Ten (10) years of experience as an ISSO on programs and contracts of similar scope, type, and complexity. * Experience in at least two (2) of the following areas: + Current security tools + Hardware/software security implementation + Communication protocols + Encryption techniques and tools * DoD 8570 Information Assurance Management (IAM) Level I certification or higher. * Demonstrated experience with information-system security policies, standards, methodologies, security documentation, and day-to-day security operations. * Experience assessing system changes and their potential security impact. * Experience supporting security authorization, certification and accreditation, and information-assurance activities. * Active TS/SCI clearance with Polygraph. * Ability to work full-time on site in a secure environment., Network Routing Ancient History Network Switches Software Systems Security Policies Software Security Hardware Security Solution-Oriented Analytical Method Life Cycle Support Security Solutions Systems Integration Information Systems Network Engineering Operations Security User Identification Time Off Management Security Engineering Software Development Software Maintenance Signals Intelligence Information Assurance Information Processing Application Development Configuration Management Communications Protocols Vulnerability Management IAT Level II Certification IAM Level II Certification Computer Network Operations Information Systems Security Security Requirements Analysis, NetFlow Equities Dashboard Wireshark Operations Leadership Automation Mitigation Market Data Risk Analysis Cyber Defense Cyber Security Trend Analysis Packet Analyzer Ancient History Threat Detection Malware Analysis Network Analysis Application Layers Network Monitoring Information Systems Exploitation Techniques Vulnerability Management Open Source Intelligence Cyber Threat Intelligence Cyber Kill Chain Framework Standard Operating Procedure Open Systems Interconnection ArcSight Enterprise Security Manager ## Description Purchasing ServiceNow Upskilling IT Security Market Data Cryptography Risk Analysis Cyber Security Key Management Risk Management Authentications Control Systems Network Routing Ancient History Computer Science Network Switches Security Policies Software Security Security Solutions Information Systems Operations Security Traceability Matrix User Identification Security Engineering Signals Intelligence Information Assurance Cyber Security Systems Configuration Management Vulnerability Management Risk Management Framework Authorization (Computing) IT Security Documentation IAM Level I Certification Computer Network Operations Information Systems Security Security Requirements Analysis Top Secret-Sensitive Compartmented Information (TS/SCI Clearance), 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. You'll help protect the systems and information our customers depend on-supporting information assurance, security operations, system accreditation, configuration management, and the security posture of mission-critical information systems. Working alongside ISSMs, senior ISSOs, system administrators, engineers, and mission teams, you'll help ensure systems remain secure, compliant, documented, and ready to support the mission. This is a full-time, on-site position in a secure mission environment. Due to the nature of the work and security requirements, remote work is not available for this position. If you have deep information-assurance and cybersecurity experience and want to apply that expertise to work that directly supports national security, we'd like to talk. What You'll Do As an ISSO, you'll help maintain the operational security posture of information systems and programs while ensuring applicable security policies, standards, and methodologies are implemented and followed. You'll: * Support senior ISSOs in implementing and enforcing information systems security policies, standards, and methodologies. * Plan and coordinate IT security programs and policies and help develop system security policies that ensure compliance. * Support the Information System Security Manager (ISSM) in maintaining the appropriate operational Information Assurance (IA) posture for systems, programs, and enclaves. * Evaluate security solutions to ensure they meet requirements for processing classified information. * Perform vulnerability and risk-assessment analysis in support of certification and accreditation activities. * Develop, maintain, and update security documentation, including System Security Plans (SSPs), Risk Assessment Reports, Certification and Accreditation (C&A) packages, System Requirements Traceability Matrices (SRTMs), and other required IA documentation. * Develop and maintain C&A documentation in accordance with applicable ODNI and DoD policies and support obtaining C&A for information systems under your purview. * Support security-authorization activities in accordance with the National Institute of Standards and Technology Risk Management Framework (NIST RMF). * Manage and control system changes, evaluate their security impact, and provide Configuration Management (CM) for security-relevant information-system software, hardware, and firmware. * Maintain records for workstations, servers, routers, firewalls, intelligent hubs, network switches, and other system components, including system upgrades. * Support day-to-day security operations and administer user identification and authentication mechanisms for Information Systems. * Support customer transition to ServiceNow (SNOW) * Serve as the Approval Authority for Information Systems under your control, as required by the program. Your experience will help ensure security is more than a compliance activity-it's an integral part of maintaining systems the mission can trust., Operations Leadership Subnetwork Market Data Communication IP Addressing Microsoft 365 Cyber Defense Cyber Security Microsoft Excel Windows Servers Decision Making Microsoft Teams Windows Desktop Ancient History Microsoft Office Microsoft Access Cisco Networking Operating Systems Microsoft Outlook Microsoft Servers Policy Development Network Monitoring Information Systems Virtual Environment Knowledge Management Cyber Threat Intelligence IAT Level II Certification Interpersonal Communications Peering (Computer Networking) Top Secret-Sensitive Compartmented Information (TS/SCI Clearance) +0 Google Cybersecurity Senior Information System Security Officer Leidos Annapolis Junction, MD*On-Site Firewall Equities Operations Management Purchasing Upskilling Encryption Market Data Cryptography Key Management Security Tools ## Related Videos - [Transforming Education: A Journey from interactive Markdown to Remote-Labs](https://www.wearedevelopers.com/videos/941-transforming-education-a-journey-from-interactive-markdown-to-remote-labs) - [Enhancing Workload Security in Kubernetes](https://www.wearedevelopers.com/videos/356-enhancing-workload-security-in-kubernetes) - [Security Pitfalls for Software Engineers](https://www.wearedevelopers.com/videos/726-security-pitfalls-for-software-engineers) - [Cyber Sleuth: Finding Hidden Connections in Cyber Data](https://www.wearedevelopers.com/videos/893-cyber-sleuth-finding-hidden-connections-in-cyber-data) - [Full Spectrum File Uploads](https://www.wearedevelopers.com/videos/870-full-spectrum-file-uploads) - [What makes Cybersecurity different for critical infrastructure?](https://www.wearedevelopers.com/videos/571-what-makes-cybersecurity-different-for-critical-infrastructure) ## Related Articles - [Dev Digest 134 - Where pixels sing?](https://www.wearedevelopers.com/magazine/477-dev-digest-134-where-pixels-sing) - [9 Ways to Make Money Hacking](https://www.wearedevelopers.com/magazine/333-9-ways-to-make-money-hacking) - [Events like RSAC Get You CISOs. Developers Decide What Actually Gets Deployed.](https://www.wearedevelopers.com/magazine/693-events-like-rsac-get-you-cisos-developers-decide-what-actually-gets-deployed) - [Walking Into The Era of Supply Chain Risks](https://www.wearedevelopers.com/magazine/106-walking-into-the-era-of-supply-chain-risks) - [Understanding and Mitigating Common Web Vulnerabilities](https://www.wearedevelopers.com/magazine/565-understanding-and-mitigating-common-web-vulnerabilities) - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again)