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Leidos Cyber Defense Analyst in Reston, Virginia


Job Description:

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 35,000 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 using the latest technical advancements, including custom built cybersecurity and cyber intelligence capabilities. 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.

In this position, you will have the ability to grow thru training opportunities, conferences and collaboration with industry peers and adjacent parts of our business. You will be challenged and provided a tremendous opportunity for growth in a highly collaborative environment. This is not a “tiered” SOC – you will own your investigations from start-to-finish, supported within our collaborative environment.

Primary Responsibilities

  • Analyze network and host activity associated with both successful and unsuccessful intrusions by advanced attackers.

  • Perform network traffic analysis using 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,focused on providing 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.

Basic Qualifications

  • BS Degree and 2-4 years relevant experience in cyber security or network defense; or 2-4 years relevant experience with relevant certifications (CISSP, SANS GIAC, CEH, etc.)

  • Some experience in/exposure to conventional network\host-based intrusion analysis, digital forensics, or malware analysis.

  • Some experience performing "deep dive" analysis and correlation of log data from multiple sources including PCAP and forensic artifacts.

  • Experience with incident response activities

  • Understanding of Operating Systems and Network Protocols.

  • Significant familiarity with Microsoft Windows administrative tools and the Unix/Linux command line.

Preferred Qualifications

  • Understanding of behavioral based threat models, including ATT&CK, Cyber Kill Chain, Diamond Model, etc.

  • Experience with Splunk (preferred) or other SIEM-type platform

  • Capable and comfortable communicating actionable threat intelligence to both technical and executive-level stakeholders.

  • Familiarity with common languages (like Perl and Python) to parse logs, automate processes, and integrate systems.

  • Previous experience as Threat Researcher and/or Intelligence Analyst.

  • Experience with dynamic malware analysis, and reverse engineering.

  • Experience in cryptography or cryptanalysis

  • Ability to create, modify, and implement both Snort and YARA signatures.

  • Published research papers at conferences or through other mediums (blogs, articles).

  • Working knowledge of Computer Network Exploitation (CNE), Computer Network Attack (CNA) and Computer Network Defense (CND) tools and techniques.

  • A deep understanding of advanced cyber threats targeting enterprises, along with the tools, tactics, and procedures used by those threats.

  • Experience applying threat and data modeling, advanced data correlation, and statistical analysis to develop alerts, notable events, investigative dashboards, and metrics driven reports.

External Referral Bonus:Eligible

Potential for Telework:No

Clearance Level Required:None

Travel:Yes, 10% of the time

Scheduled Weekly Hours:40


Requisition Category:Manager

Job Family:Cyber Operations

Leidos is a Fortune 500® information technology, engineering, and science solutions and services leader working to solve the world's toughest challenges in the defense, intelligence, homeland security, civil, and health markets. The company's 33,000 employees support vital missions for government and commercial customers. Headquartered in Reston, Virginia, Leidos reported annual revenues of approximately $10.19 billion for the fiscal year ended December 28, 2018. For more information, visit

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.

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 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

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.

REQNUMBER: R-00030477-OTHLOC-PL-2D2293

All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability or veteran status. Leidos will consider qualified applicants with criminal histories for employment in accordance with relevant Laws. Leidos is an equal opportunity employer/disability/vet.