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Title: Senior Cyber Defense Analyst III Location: Alexandria, VA Clearance: TS/SCI with the ability to obtain and maintain a CI polygraph Job Details: * Perform and lead advanced investigation of complex security events and incidents across network, endpoint, identity, firewall, vulnerability, and other available telemetry * Perform cyber defense incident triage, including validation, enrichment, determination of scope, urgency, potential impact, and appropriate escalation * Support incident ha…