Senior Cybersecurity Incident Handler

GM • Warren, MI

5d • Hybrid

About The Position

The Cyber Security Incident Handler investigates, coordinates, and resolves cybersecurity incidents across the enterprise. The role handles alert triage, investigative planning and hypothesis development, evidence collection, host analysis, containment, eradication, recovery support, documentation, and escalation based on risk and business impact.

The position also improves the repeatability and scalability of response operations by turning manual or error-prone processes into documented workflows, automations, integrations, and reusable investigative tools. The role develops or maintains Python-based utilities, parsers, dashboards, and command-line tools; builds GitHub Actions and CI/CD workflows; and manages security capabilities using Terraform, GitOps, source control, and peer-reviewed deployment practices. It supports integrations with threat-intelligence and collaboration platforms such as MISP, Slack, GitHub, Confluence, and Sguil.

The role is categorized as hybrid. The selected candidate is expected to report to a specific location at least three times per week, or at another frequency directed by their manager. GM does not provide immigration-related sponsorship for this role. Relocation benefits are available to candidates who qualify under company policy.

Requirements

• Experience with incident triage, scoping, evidence collection, endpoint investigation, containment, remediation, and operational recovery.
• Experience designing and deploying Windows live-response capabilities, including multi-host workflows, timeout handling, YARA scanning, file retrieval, and file removal.
• CrowdStrike Falcon administration and engineering experience across Fusion Workflows, IT Automation, Next-Gen SIEM, custom IOA rules, lookup files, detections, APIs, and endpoint response.
• Experience designing workflows for directory removal, scheduled-task removal, live-response deployment, file operations, host-online notification, detection auto-closure, host containment, and BitLocker recovery actions.
• Experience integrating CrowdStrike with Slack, MISP, Sguil, GitHub, and other operational tools.
• Experience developing correlation rules, including real-time NGSIEM rules and rules supporting suspected DPRK activity investigations.
• Python development experience for security exports, command-line utilities, API integrations, data transformation, and operational services.
• Experience with GitHub repository design, pull-request-based delivery, GitHub Actions, GitHub Pages, workflow automation, and cross-repository synchronization.
• Experience with multi-environment CI/CD deployment for CrowdStrike and Velociraptor capabilities.
• Experience architecting MISP-to-CrowdStrike IOC integration for Intel and Detect.
• Experience migrating or recovering Next-Gen SIEM correlation rules, including addressing operational risks caused by author-permission dependencies.
• Experience consolidating and migrating documentation across Response, Security Operations, Detect, Engineering, and NSM SID into a unified GitHub Pages wiki.
• Experience creating automated incident-writeup synchronization from GitHub wiki to Confluence.
• Strong technical documentation skills covering deployment, single-host and multi-host use, timeout configuration, troubleshooting, and operational procedures.

Nice To Haves

• Experience with Velociraptor or comparable endpoint live-response platforms.
• Experience with YARA, endpoint telemetry, host artifacts, and forensic collection workflows.
• Experience integrating MISP, CrowdStrike, Slack, Confluence, GitHub, Sguil, Databricks, or comparable enterprise security platforms.
• Experience supporting regulated or highly governed enterprise environments.
• Experience contributing to open-source security or infrastructure tooling.
• Experience migrating documentation or operational content between wiki platforms.
• Experience designing secure automation with role-based access, audit trails, approval controls, and rollback considerations.

Responsibilities

• Triage and investigate alerts and incidents involving endpoints, identities, malware, suspicious processes, persistence mechanisms, network activity, and potential data exposure.
• Develop investigative plans; gather and preserve evidence; analyze endpoint telemetry and live-response results; and document findings.
• Perform or coordinate approved containment, eradication, and remediation actions, including host isolation, live response, file retrieval or removal, directory cleanup, and scheduled-task removal.
• Use CrowdStrike Falcon, Next-Gen SIEM, live-response tooling, IT Automation, and other security platforms to investigate and respond to incidents.
• Coordinate incident activities with Response, Detect, Endpoint, Engineering, Insider Threat, Threat Intelligence, and other stakeholders.
• Assess incident severity, business impact, scope, and risk; escalate appropriately; and provide status updates to technical and leadership audiences.
• Identify indicators of compromise and investigative leads, and collaborate with detection and intelligence teams to improve correlation rules, threat hunting, and monitoring coverage.
• Create complete and durable incident documentation, including timelines, investigative actions, evidence, containment decisions, root-cause findings, and lessons learned.
• Contribute to and maintain response playbooks, wiki content, workflow documentation, and operational procedures.
• Identify recurring operational friction and help develop secure automation, scripts, dashboards, integrations, and workflows to improve responder efficiency.
• Test response capabilities, validate safeguards and permissions, and support deployment across development, test, and production environments.
• Participate in incident reviews, process improvement, mentoring, and knowledge-sharing across Security Operations.

Benefits

• Relocation benefits are available for candidates who qualify under company policy.
• GM provides employee well-being and career-support resources; specific benefit offerings are described in its Total Rewards resources.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: No Education Listed