Description Leidos has a current job opportunity for a Cyber Intelligence Fusion Analyst on the DISA GSM-O II TN24 Penetration Handling, Incident, System Health (PHISH) Support Services II program. This position supports the J361 Security Operations Center (SOC) Fusion mission at the Mark Center, Alexandria, Virginia. The team operates 100% onsite at the Mark Center during normal business hours, Monday through Friday, 0600-1800.
Position SummaryThe Cyber Intelligence Fusion Analyst serves as the proactive analysis and threat-hunting engine for the J361 SOC. The analyst synthesizes all-source threat reporting to conduct structured threat hunts, perform proactive environment sweeps, and deliver tailored analytical reports and briefings to senior leadership.
The position combines cyber operations, threat intelligence, and analytic tradecraft to identify, characterize, and mitigate threats affecting tenants and subscribers throughout the National Capital Region. Responsibilities include correlating external intelligence with enterprise telemetry, mapping adversary TTPs, recommending detections and countermeasures, and providing threat context during incident investigations across classified, unclassified, and cloud environments.
Primary Responsibilities- Ingest, analyze, and synthesize cyber threat reporting from OSINT, government reporting, commercial threat-intelligence platforms, and other authorized sources to identify threats relevant to the environment.
- Correlate external threat intelligence with enterprise SIEM, EDR, endpoint, network, packet capture (PCAP), NetFlow, proxy, firewall, IDS/IPS, SSL/TLS inspection, session, and system-log telemetry to identify and assess malicious activity.
- Conduct proactive IOC sweeps and hypothesis-driven threat hunts to identify activity associated with emerging adversary campaigns, vulnerabilities, malware, targeted threats, and stealthy or evasive adversary behavior.
- Characterize adversary infrastructure, malware, tooling, and TTPs using MITRE ATT&CK, Cyber Kill Chain, and other applicable threat-modeling frameworks; assess potential risk to enterprise assets, tenants, and mission operations.
- Develop hunt plans, adversary profiles, analytic methodologies, detection logic, and complex query strategies; plan, coordinate, and execute ad hoc threat hunts; and document findings and recommendations in after-action reports (AARs) and other required mission products.
- Develop, validate, and recommend countermeasures, including SIEM correlation searches, analytic content, custom signatures, and blocking recommendations, to improve prevention, detection, and response to known adversarial TTPs; technically vet suspicious indicators before submitting detection or blocking nominations.
- Produce recurring and ad hoc threat reports, intelligence assessments, executive summaries, situational-awareness updates, time-sensitive threat notifications, and strategic threat assessments.
- Translate technical telemetry, forensics, intelligence reporting, and analytic findings into clear, actionable technical, operational, and executive-level summaries; prepare and deliver recurring and on-demand briefings to leadership, tenant organizations, and mission partners.
- Serve as a subject matter expert on adversary tradecraft and provide threat context, intelligence support, and analytic recommendations to incident responders and other SOC teams during active investigations.
- Develop and maintain SOPs, work instructions, hunt methodologies, analytic playbooks, detection use cases, and knowledge-management artifacts; identify capability and workflow gaps, recommend improvements; and enhance automation for enrichment, case management, reporting, dashboards, and metrics.
- Measure and improve hunt and detection coverage against prioritized adversary behaviors; maintain a repeatable hunt backlog that tracks hypotheses, data-source dependencies, findings, detection outcomes, unresolved gaps, and remediation recommendations.
- Provide technical leadership on complex hunts and investigations; mentor junior analysts and contribute to team training and professional development.
Basic Qualifications- Bachelor's degree in cybersecurity, information technology, computer science, intelligence studies, or a related technical discipline and 8+ years of relevant experience; additional relevant experience, cybersecurity education, or industry certifications may be substituted for a degree. At least 4 years of this experience must include cybersecurity operations, cyber threat intelligence, threat hunting, incident response, cyber network defense, or a closely related cyber mission.
- Active Top Secret security clearance; must be a U.S. citizen.
- Must meet DoD 8140 IAT Level II baseline certification requirements before starting work and possess, or obtain and maintain within the required program timeframe, a DoD 8140 CSSP Analyst (CSSP-A) certification.
- Demonstrated experience applying MITRE ATT&CK, Cyber Kill Chain, or comparable frameworks to characterize adversary activity, TTPs, attack lifecycles, vulnerabilities, malware behaviors, and indicators.
- Demonstrated hands-on experience conducting end-to-end, hypothesis-driven threat hunts, including developing detection logic and analytic queries; pivoting from external threat reporting, indicators of compromise (IOCs), and open-source intelligence (OSINT) to internal enterprise telemetry; identifying required data sources; executing and refining queries; validating findings through endpoint, identity, and network telemetry; documenting analytic conclusions; and transitioning validated findings into detections, response actions, or follow-on collection requirements.
- Demonstrated experience with Windows and Linux host-based investigation artifacts, including process execution, command-line activity, persistence mechanisms, authentication events, scheduled tasks or services, PowerShell or shell activity, file-system artifacts, and endpoint detection and response (EDR) telemetry.
- Experience assessing telemetry quality and detection coverage against priority adversary techniques, including identifying collection gaps, data-normalization issues, blind spots, false-positive drivers, and recommendations for new or improved logging, analytic content, and hunt data sources.
- Demonstrated experience querying, analyzing, and correlating high-volume SIEM, EDR, endpoint, network, NetFlow, packet, log, and other host- or network-based security data; working knowledge of TCP/IP, common ports and protocols, network traffic flow, OSI model, system administration, defense-in-depth, and enterprise security architecture.
- Strong written, verbal, analytical, and collaboration skills, including the ability to produce technical and executive-level reports and briefings; ability to work independently, manage competing priorities, and work effectively with technical and non-technical mission partners.
- Proficiency developing, testing, and tuning analytic queries and detection content using at least one relevant query language or scripting tool, such as Splunk Processing Language (SPL), Kusto Query Language (KQL), Elastic/Lucene query syntax, SQL, Python, PowerShell, and Unix/Linux command-line utilities.
- Ability to work 100% onsite at the Mark Center during normal business hours; schedule flexibility may be required to support mission requirements.
Preferred Qualifications- Eligibility for TS/SCI access, including reciprocal acceptance, is preferred.
- Advanced cybersecurity certifications, such as CISSP, CASP+, CySA+, CEH, GIAC GCIH, GCIA, GCED, GCTI, or comparable credentials.
- Experience supporting DISA, Department of Defense networks, Cyber Security Service Provider operations, Cyber Protection Teams, or a large enterprise SOC.
- Experience conducting threat hunting and cyber investigations across NIPRNet, SIPRNet, JWICS, cloud, commercial, or similarly complex enterprise environments.
- Experience producing intelligence products, operational reports, and executive briefings for senior executives, General Officer/Flag Officer, Senior Executive Service, or equivalent leadership; demonstrated ability to lead complex cyber investigations or threat hunts and mentor junior technical staff.
- Experience using SIEM, EDR, threat-intelligence, and network-analysis tools, such as Splunk, Elastic, Microsoft Defender for Endpoint, Microsoft Sentinel, Google Threat Intelligence, Virus Total, Wireshark, PCAP, and NetFlow, to develop or tune correlation searches, detection rules, signatures, threat blocks, analytic queries, dashboards, and automated enrichment workflows.
- Experience developing, validating, and maintaining detection content in portable or platform-specific formats, such as Sigma rules, YARA rules, Suricata/Snort signatures, SIEM correlation searches, EDR custom detections, and behavioral analytics.
- Working knowledge of commercial threat-intelligence platforms, malware behavior analysis, digital and network forensic triage, endpoint telemetry, intrusion detection, vulnerability research, cloud security, and intelligence-driven defense methodologies.
- Experience conducting cloud and identity-focused threat hunting using identity, authentication, audit, and workload telemetry from Microsoft 365, Microsoft Entra ID, Azure, Amazon Web Services (AWS), Google Cloud Platform (GCP), or comparable enterprise cloud environments.
- Experience performing endpoint and network forensic triage to validate hunt findings, including review of process trees, memory or disk artifacts, Windows Event Logs, Sysmon, authentication logs, DNS, proxy, firewall, PCAP, and NetFlow data.
- Experience analyzing identity-based and lateral-movement behaviors, including suspicious authentication patterns, privileged-account use, remote execution, credential access, Active Directory enumeration, and persistence techniques.
- Experience with adversary emulation, purple-team exercises, or detection-validation activities that map simulated adversary behavior to MITRE ATT&CK techniques and measure detection coverage, analytic fidelity, and response readiness.
- Experience automating repetitive hunt, enrichment, and detection-engineering tasks through application programming interfaces (APIs), Python, PowerShell, SOAR playbooks, or case-management workflows.
- Experience operationalizing threat intelligence through indicator lifecycle management, including indicator validation, expiration, prioritization, enrichment, enterprise sweeping, and conversion of relevant intelligence into behavioral detections.
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Original Posting:November 10, 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.
Pay Range:Pay Range $107,900.00 - $195,050.00
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.
About LeidosLeidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit www.Leidos.com.
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