Incident Response Analyst

Leidos is seeking an experienced Incident Response Analyst to support the Defense Manpower Data Center (DMDC) CyberPRIMES program. Leidos is a major partner on the contract and will provide a substantial portion of the cybersecurity workforce supporting the Defense Human Resources Activity (DHRA) and DMDC. The Incident Response Analyst will investigate and respond to cybersecurity events and incidents affecting DHRA systems and networks. This position supports the full incident-response lifecycle—from detection and analysis through containment, eradication, recovery, and post-incident activities—and works closely with Security Operations Center analysts, Cybersecurity Service Providers, system owners, and technical teams during active cybersecurity incidents. Work Locations: Mark Center, Alexandria, Virginia Department of Defense Center – Monterey Bay, Seaside, California Clearance: Active Secret security clearance required at time of consideration. U.S. Citizen is a must.Mission Environment DMDC supports the Defense Human Resources Activity within the Office of the Under Secretary of Defense for Personnel and Readiness (OUSD(P&R)) and maintains the Department of Defense’s largest and most comprehensive central repository of personnel, manpower, casualty, pay, entitlement, personnel security, identity, readiness, training, and related data. The DHRA Information Technology (IT) environment includes approximately 15,000 network and endpoint devices supporting more than 600 Government-Off-The-Shelf (GOTS) applications and approximately 100 Risk Management Framework (RMF) authorization boundaries managed through the Enterprise Mission Assurance Support Service (eMASS). Incident-response operations support both the Non-classified Internet Protocol Router Network (NIPRNet) and Secret Internet Protocol Router Network (SIPRNet) environments. Analysts must be able to move quickly from security-event identification into investigation and coordinated response while maintaining accurate records, preserving evidence, and keeping Government stakeholders informed. Primary Responsibilities:Support preparation, detection, analysis, containment, eradication, recovery, and post-incident activities for cybersecurity events and incidents. Investigate cybersecurity incidents affecting NIPRNet and SIPRNet environments. Perform proactive security monitoring and analysis to identify potential intrusion attempts and other malicious activity. Analyze security information from Security Information and Event Management (SIEM) platforms, endpoint-security capabilities, firewalls, Intrusion Detection Systems (IDS), Intrusion Prevention Systems (IPS), web-security systems, antispam capabilities, malware-prevention systems, and related enforcement technologies. Recognize potential intrusion attempts, malicious activity, or other cybersecurity conditions requiring immediate investigation or mitigation. Assess cybersecurity events to determine scope, potential impact, affected systems, and required response actions. Support containment and mitigation of active cybersecurity threats in accordance with approved Government procedures. Coordinate eradication and recovery activities with system owners, administrators, network personnel, cybersecurity teams, and other technical stakeholders. Collect and preserve technical evidence associated with cybersecurity events and incidents. Maintain complete and accurate incident records, timelines, supporting evidence, investigative findings, response actions, and status information. Develop and contribute to required cybersecurity event and incident reporting. Coordinate incident-response activities with Security Operations Center analysts, Cybersecurity Service Providers (CSSPs), system owners, technical teams, and Government stakeholders. Support escalation of significant cybersecurity events and incidents in accordance with established procedures. Provide timely status updates during active investigations and incident-response activities. Support post-incident analysis and lessons learned to identify opportunities to improve monitoring, detection, response procedures, and defensive capabilities. Participate in after-hours incident response when assigned and meet the contract-required one-hour recall requirement. Basic Qualifications:Bachelor’s degree and 5 or more years of relevant cybersecurity experience. Specific experience, education and training may be considered in lieu of degree.Experience supporting cybersecurity incident response, Security Operations Center operations, cyber defense, or security-event investigation. Experience performing analysis of cybersecurity events and determining appropriate response or escalation actions. Experience supporting incident containment, eradication, recovery, and post-incident activities. Experience monitoring and analyzing enterprise cybersecurity tools and security telemetry. Experience documenting incident timelines, investigative findings, evidence, response actions, and status. Experience coordinating cybersecurity incidents across technical teams and stakeholder organizations. Working knowledge of network, endpoint, and enterprise cybersecurity monitoring concepts. Ability to recognize potential intrusion activity and support rapid mitigation of cybersecurity threats. Ability to communicate clearly during active cybersecurity incidents and maintain accurate documentation under time-sensitive conditions. Ability to support after-hours incident response and the required one-hour recall when assigned. U.S. Citizenship required. Active Secret security clearance required. Preferred Qualifications: Experience supporting cybersecurity incident response within Department of Defense or Federal environments. Experience responding to incidents in both unclassified and classified network environments. Experience with Security Information and Event Management platforms and enterprise security-monitoring capabilities. Experience analyzing endpoint-security, firewall, Intrusion Detection System, Intrusion Prevention System, web-security, antispam, or malware-prevention data. Experience supporting evidence collection and preservation during cybersecurity investigations. Experience coordinating incident response with Security Operations Center personnel, Cybersecurity Service Providers, system owners, network teams, and other technical organizations. Experience operating in a 24x7 cybersecurity operations environment or supporting after-hours incident response. Familiarity with Department of Defense cybersecurity incident-response processes and requirements. Familiarity with DHRA, DMDC, or comparable Department of Defense enterprise environments. If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.Original Posting:September 2, 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.Pay Range:Pay Range $87,100.00 - $157,450.00The 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.SummaryLocation: Alexandria, VA; Seaside, CAType: Full time