Cyber Intrusion Analyst

The Defense Sector at Leidos currently has an opening for a Cyber Intrusion Analyst with a active SECRET clearance! Primary Responsibilities. Leadership & Team Development Member of the IMCOM HHA team, ensuring compliance with Army quality and regulatory standards. Provide hands-on leadership to the IMCOM HHA team, mentoring and developing inspectors to ensure efficient operational support and continuous improvement. Perform computer network inspections to mitigate / prevent incident detection, and response activities to detect, correlate, identify and characterize anomalous activity that may be indicative of threats to the enterprise. Monitor various security tools and applications for possible malicious activities, investigate any associated alerts or indicators, and develop recommendations for a course of action, including mitigation strategies as necessary. Conduct analysis of low-level (“low and slow”) events to identify unauthorized activity utilizing exploratory problem-solving or self-learning techniques. Conduct event triage and analysis, which can result in network traffic validations or a Mission Partner’s incident report. Utilize formal monitoring policies and procedures that include the appropriate use of DoD-approved network monitoring and traffic analysis tools to assist with identifying suspicious, anomalous, or overtly malicious network traffic on a 24/7/365 basis. Review and analyze available logs in a timely manner to detect intruders and notify Mission Partners of activity through a formal reporting process/pending an incident report. Apply, develop, tune, and distribute or optimize new and existing countermeasures or guidance to prevent or mitigate potential cyber event impacts when possible. Perform network traffic analysis utilizing raw packet data, net flow, IDS, IPS and custom sensor output, as it pertains to the cyber security of communications networks. Understand attack signatures, tactics, techniques, and procedures associated with advanced threats. Requires good technical writing skills as each event, including the associated analysis, are documented in a ticketing system for review and action. Requires excellent communication skills as we are collocated with our customer and regular face-to-face interaction is necessary throughout the day, as well as significant coordination and communication between team members. Basic Qualifications. Ability to obtain Secret Clearance. Ability to achieve TS/SCI clearance level Bachelor's, additional relevant work experience and/or military service may be considered in lieu of degree Networking: TCP/IP Fundamentals, Network Traffic Analysis, Wireshark, Cisco Packet Tracer Programming: Python, Java, JavaScript, HTML Systems: Linux, Operating Systems Concepts, Computer Architecture, MySQL Security & Analysis: Security Monitoring, Threat Detection Concepts, SIEM Concepts, Risk Mitigation, NIST Framework Concepts Experience working with DoW / Government. Strong computing system knowledge, particularly networking, including a knowledge of communication protocols and familiarity with common computing security elements such as IDS/IPS systems and firewalls. Preferred Qualifications. Active DOW Secret Clearance. CompTIA Security+, TCP/IP networking, Linux systems, Cisco Packet Tracer, Wireshark Familiarity with Military Regulations and security compliance procedures Experience with both CONUS and OCONUS threat environments to Department of War facilities. Command Line Scripting skills (PERL, python, shell scripting) to automate analysis task. Knowledge of hacker tactics, techniques and procedures (TTP). Familiarity with computing security frameworks such as MITRE ATT&CK and Cyber Kill Chain. Monitoring of intrusion detection and computer defense appliances (Splunk, Elastic), applications, and analysis of associated alerts. Knowledge of advanced threat actor tactics, techniques, and procedures (TTP) Understanding of software exploits. 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: July 6, 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 $69,550.00 - $125,725.00 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. Leidos Leidos 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 $17.2 billion for the fiscal year ended January 2, 2026. For more information, visit Pay and Benefits Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available here. Securing Your Data Leidos will never ask you to provide payment-related information at any part of the employment application process. And Leidos will communicate with you only through emails that are sent from a Leidos.com email address. If you receive an email purporting to be from Leidos that asks for payment-related information or any other personal information, please report the email to View email address on click.appcast.io. Commitment and Diversity All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.