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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Cyber Countermeasure Specialist - **Company:** After School Matters, Inc. - **Location:** Joint Base Pearl Harbor-Hickam, HI, United States (Remote available) - **Experience:** Experienced - **Salary:** $115,000.0 - $150,000.0 - **Contract:** Contract - **Skills:** Java (Programming Language), Application Programming Interfaces (APIs), Amazon Web Services, Microsoft Azure, Bash Shell, Cloud Computing, Configuration Management, CompTIA Security+, Cyber Security, Information Systems, Computer Networks, Databases, Computer Engineering, Domain Name System (DNS), Hypertext Transfer Protocols (HTTP), Internet Control Message Protocol, Identity and Access Management, Issue Tracking Systems, Intrusion Detection and Prevention, Intrusion Detection Systems, Python (Programming Language), Network Security, Network Protocols, Performance Tuning, Windows PowerShell, Regular Expressions, Anti-Phishing, Zero Trust Network Access, SQL Injection, TCP/IP, Wireshark, Wireless Access Point, Snort (Software), Scripting, Google Cloud, Microsoft Power Automate, Multi-Cloud, Azure Security Center, Tanium Platform Expertise, Adobe, Falcon Platform, Information Technology, Cortex XSOAR Platform, Firepower, Cyber Warfare, Oracle Cloud Infrastructure, Splunk, Cisco - **Published:** October 16, 2026 - **Apply:** https://thenewberrygroup.applytojob.com/apply/k3Mujo1oww/Cyber-Countermeasure-Specialist-TN22?source=GS ## About the Role * Level II (Intermediate): Bachelor's degree in Cybersecurity, Computer Science, Computer Engineering, Information Systems, or a related technical discipline with 2+ years of direct experience in Computer Network Defense (CND), intrusion detection/prevention, or security tool engineering; OR an Associate degree with 4+ years; OR 6+ years of relevant professional/military cyber operations experience in lieu of a degree. * Level III (Senior): Bachelor's degree with 4+ years of relevant experience; OR an Associate degree with 6+ years; OR 8+ years of relevant experience / military service in lieu of a degree. Required DoD 8140 / 8570 Baseline Certification * Must hold a valid certification or degree compliant with DoD 8140.03 / DCWF Work Role Code 521: Cyber Defense Infrastructure Support Specialist (Basic or Intermediate level) prior to start date: * Accepted Certifications include: CompTIA Security+ CE, CySA+, CCNA-Security, CND, SSCP, GICSP, GSEC, or advanced certifications such as CASP+ CE, CCNP Security, GCIA, GCIH, or CISSP. * Ability to obtain the required Computing Environment (CE) certification within 6 months of start date (e.g., Cisco Certified CyberOps Associate/Professional, Cisco FirePOWER specialist credential, Snort Rule Writing certification, or Microsoft SC-200)., * Proven experience writing, testing, and deploying custom intrusion signatures (e.g., Snort, Suricata, YARA, Bro/Zeek) and firewall/ACL rule configurations. * Working administrative knowledge of Cisco FirePOWER Management Center (FMC), IDS/IPS appliances, and proxy/web content filtering solutions. * Deep understanding of network protocols (TCP/IP, UDP, ICMP, DNS, HTTP/S, TLS) and packet inspection tools (Wireshark, tcpdump). * Familiarity with adversary tactics, techniques, and procedures (TTPs) and the MITRE ATT&CK® framework. * Ability to participate in an on-call rotation for emergency after-hours surge or high-priority operational containment events., * Prior experience supporting DISA or Service Cyber Components (ARCYBER, AFCYBER, FLTCYBER, MARFORCYBER). * Hands-on experience developing automated incident response workflows or SOAR playbooks (e.g., Cortex XSOAR, Splunk SOAR/Phantom, Sentinel Logic Apps). * Scripting expertise in Python, PowerShell, Bash, or Regular Expressions (Regex) for signature creation and data parsing. * Knowledge of endpoint detection and response (EDR) platforms (Microsoft Defender for Endpoint, Tanium, CrowdStrike) and their containment actions. * Familiarity with DoD security policies (DoDI 8530.01, CJCSM 6510.01F) and incident tracking databases (Rally). ## Description * Custom Signature Development: Design, author, test, and deploy custom detection and prevention signatures for Antivirus, Network Intrusion Detection/Prevention Systems, Web Content Filtering, and Enterprise Recursive Services to counter zero-day exploits, spear-phishing, Java/Adobe vulnerabilities, and SQL injection attacks. * Perimeter Defense Tuning: Formulate active countermeasures across DISA Enterprise Boundaries-including Internet Access Points, Boundary Cloud Access Points, and DODIN DMZs-utilizing Cisco FirePOWER Management Center, Next Generation Sensors, Open Sensor Platform, Arbor, and Cloud-Based Internet Isolation. * Automated Blocking & Telemetry Analysis: Analyze telemetry from automated blocking tools to evaluate blocked versus allowed traffic, conduct root-cause assessments on events that bypassed automated defenses, and refine blocking algorithms to eliminate false positives and false negatives. * Countermeasure Tracking & De-confliction: Track all deployed customer and enterprise countermeasures; document de-confliction actions and configuration management changes to ensure boundary defensive posture remains synchronized and uninterrupted without adverse impacts on operational network stability. * Rollback & Network Freeze Procedures: Execute and maintain rapid-rollback procedures to immediately restore network devices and sensors to their operative baseline state should defensive actions impact mission availability, adhering strictly to government-directed network freeze conditions., * Signature & Rule Lifecycle Management: Lead end-to-end lifecycle management of signatures and detection rules, including periodic reviews, tuning, retirement of redundant/outdated detections, and monthly reporting of custom countermeasures. * Zero Trust & Multi-Cloud Defense Engineering: Develop and execute tailored countermeasures across enterprise cloud and Zero Trust environments, including Joint Warfighter Cloud Capability CSPs (AWS GovCloud, Azure Government, Google Cloud Platform, Oracle Cloud Infrastructure), Thunderdome Zero Trust Network Access (ZTNA), and Microsoft Defender suite (EndGuard). * Discovery Counter Infiltration (DCI) & Deliberate Defense (DD): Collaborate with threat analysts to translate warning intelligence and Attack Sensing and Warning data into concrete countermeasures; automate repeatable mitigation actions and convert tactical hunt hypotheses into production analytics. * Trend & Statistical Analysis: Perform rigorous trend analysis on incident response actions and defense performance; contribute to the monthly Respond Statistical and Trend Report detailing signatures created, intelligence-driven rulesets, and mitigation effectiveness. * Command & Regulatory Reporting: Ensure all containment and countermeasure actions comply with CJCSM 6510.01F and DoDI 8530.01 standards; log response data in the DoD-mandated Incident Reporting Structure (currently Rally) and issue technical mitigation recommendations to the DISA Joint Operations Center (DJOC)., * PACOM Mission Network (PMN) and Joint Operational Edge - Coalition Environment (JOE-CE) Countermeasures: Develop and deploy specialized countermeasures for the PMN and JOE-CE architectures at DISA PAC, leveraging Mission Edge Compute endpoints, Identity Credential and Access Management integrations, and User and Entity Behavior Analytics. * Defensive Automation & Playbook Optimization: Identify areas where security orchestration adds measurable value; author and enrich SOAR playbooks, custom API workflows, and scripts to automate containment actions during critical security events. * SCIF-Based Multi-Level Operations: Operate within Sensitive Compartmented Information Facilities (SCIF) at Ford Island, applying countermeasures across classified enclaves up to Top Secret / SCI (JWICS and YLAN). * Enterprise Coordination: Coordinate technical responses and rule modifications with the DISA Field Office Commander, USPACOM J6, DoD Cyber Defense Command (DCDC), USCYBERCOM, and commercial vendors to resolve complex exploit techniques.