Senior Cyber Defense Analyst

Leidos' Corporate Information Security Office, reporting through the Digital sector, is seeking a Senior Cyber Defense Analyst. This is an opportunity to join a team of highly skilled and innovative network defenders, and the best group of individuals out there. Leidos' Cybersecurity Intelligence and Response Team (CSIRT) has an immediate opening for a motivated Cyber Defense Analyst. Leidos is an international company made up of 50,000 employees that provides Defense, Intelligence and Health Products to our customers. Our goal is to stay ahead   of, and   maintain a technical advantage over our adversaries .     As a key part of the team, your responsibilities will include threat hunting, and tactical analysis of ongoing attacks by criminal and nation state actors. You will perform data analysis, incident response, investigative analysis, and research on existing and emerging cyber threats, particularly those directed against Leidos' global networks. You will be expected to "think like an adversary" and engage in threat hunting operations leveraging your understanding of the tactics, techniques and procedures employed by advanced threats combined with intelligence from multiple   sources, and   provide reporting and briefings to other teams and leadership in order to maintain appropriate levels of situational awareness.   A CSIRT That's Evolving Through   Hyperautomation   and Agentic AI   Our CSIRT is actively maturing its operations by integrating   hyperautomation   and agentic AI into the detection, triage, and response lifecycle. Rather than relying solely on manual playbooks, the team is building and deploying intelligent automation that can orchestrate routine investigative steps, correlate signals across disparate tools, and accelerate the path from alert to action .   This is a chance to help define what a modern, AI-augmented CSIRT looks like — combining seasoned analyst tradecraft with   cutting-edge   automation to outpace adversaries at scale.

Analyze network and host activity associated with both successful and unsuccessful intrusions by advanced attackers.   Perform network traffic analysis   utilizing   raw packet data, net flow, IDS, and custom sensor output.   Support enterprise incident response efforts. Leverage understanding of tactics, techniques and procedures associated with advanced threats to create and add custom signatures that mitigate highly dynamic threats to the enterprise.    Employ advanced forensic tools and techniques for attack reconstruction and intelligence gathering.   Proactively research   emerging   cyber threats. Apply analytical understanding of attacker methodologies and tactics, system vulnerabilities, and key indicators of attacks and exploits.   Contribute to threat intelligence reports and briefings that provide situational awareness of cyber threats   impacting   the company's global network infrastructure, to every level of the organization.   Participate in threat hunt operations using known adversary tactics,   techniques   and procedures, as well as indicators of attack,   in order to   detect advanced threats to the enterprise.   Collaborate using information and knowledge sharing networks and professional relationships to achieve common goals.   Provide on-call support for incident response efforts outside of core hours ,   as needed.   Mentor junior analysts technically and conceptually   Lead small groups within the team for discernable tasks, including projects and incident response   Drive advanced countermeasures through to completion    Understanding and educating the team about defending new threat vectors        REQUIRED QUALIFICATIONS   Must be a U.S. Citizen and eligible to obtain DoD Secret clearance. BS Degree and 8 - 12   years relevant experience in cyber s ecurity or network defense; or equivalent education and years of relevant experience coupled with relevant