Senior Incident Response Analyst

Leidos LLC; Arlington (VA); On-site; USD 131,000 - 237,000; Full time

Benefits offered by this job

Health and Wellness programs

Paid leave

Retirement plan

Job summary

Leidos LLC is seeking a Senior Incident Response Analyst to support the DHS CISA Security Operations Center (SOC) program. The role focuses on coordinating investigations, analyzing events, and developing incident response playbooks across Windows and Linux environments.

Ideal candidates have a strong IR life cycle background, ATT&CK framework understanding, and scripting skills (Python/PowerShell/Bash). This position requires a bachelor's in a related field and extensive cyber experience, with

Qualifications

• Bachelors degree in Computer Science, Engineering, IT, Cyber Security or related field with 12–15 years of experience; higher experience may substitute for degree.
• In-depth knowledge of the Incident Response life cycle and OS (Windows/Linux).
• Experience with enterprise network architectures, routing/switching, and common protocols.
• Ability to identify suspicious activity, attacker TTPs, and determine root cause and scope.
• Proficiency with ATT&CK framework and scripting (Python/PowerShell/Bash).
• Strong communication and ability to work with all levels of staff.

Responsibilities

• Coordinate investigation and response across the Incident Response lifecycle.
• Correlate events to determine the scope of cyber incidents.
• Analyze endpoint and network artifacts, memory, files, and scripts.
• Tune security tools to reduce false positives and improve detection.
• Document actions and prepare formal incident reports.
• Develop metrics and playbooks to mature SOC operations.
• Create scripts, signatures, and alerts for security content.

Skills

Incident response

Threat analysis

Scripting (Python/PowerShell/Bash)

Communication

Analytical thinking

Education

Bachelors in CS/Engineering/IT/Cyber Security

Cyber security certifications (preferred)

Tools

EDR

IDS

SIEM

Firewalls

Job description

At Leidos, we deliver innovative solutions through the efforts of our diverse and talented people who are dedicated to our customers’ success. We empower our teams, contribute to our communities, and operate sustainable. Everything we do is built on a commitment to do the right thing for our customers, our people, and our community. Our Mission, Vision, and Values guide the way we do business. If this sounds like the kind of environment where you can thrive, keep reading!

The Digital Modernization Sector brings together our digital transformation and IT programs, allowing us to better serve our customers through scale and repeatability.

Leidos has a critical need for a Senior Incident Response Analyst to support the DHS CISA Program.

The Department of Homeland Security (DHS), Security Operations Center (SOC) Support Services is a US Government program responsible to monitor, detect, analyze, mitigate, and respond to cyber threats and adversarial activity on the DHS Enterprise.

The DHS SOC has primary responsibility for monitoring and responding to security events and incidents detected at the Trusted Internet Connection (TIC) and Policy Enforcement Point (PEP) and is responsible for directing and coordinating detection and response activities performed by each Component SOC.

Direction and coordination are achieved through a new shared DHS incident tracking system and other means of coordination and communication.

Leidos is seeking a Senior Incident Response Analyst to join our team on this highly visible DHS CISA SOC Program.

The Incident Responder will perform the following:

• Coordinate investigation and response efforts throughout the Incident Response lifecycle
• Correlate and and analyze events and data to determine scope of Cyber Incidents
• Acquire and analyze endpoint and network artifacts, volatile memory, malicious files/binaries and scripts
• Recognize attacker tactics, techniques, and procedures as potential indicators of compromise (IOCs) that can be used to improve monitoring, analysis and Incident Response.
• Develop, document, and maintain Incident Response process, procedures, workflows, and playbooks
• Tune and maintain security tools (EDR, IDS, SIEM, etc) to reduce false positives and improve SOC detection capabilities
• Document Investigation and Incident Response actions taken in Case Management Systems and prepare formal Incident Reports
• Create metrics and determine Key Performance Indicators to drive maturity of SOC operations
• Develop security content such as scripts, signatures, and alerts

Basic Qualifications

Bachelors’ degree in Computer Science, Engineering, Information Technology, Cyber Security, or related field and 12-15 years of related experience. Additional years of experience and/or cyber certifications may be considered in lieu of degree. In-depth knowledge of each phase of the Incident Response life cycle

Expertise of Operating Systems (Windows/Linux) operations and artifacts

Expertise of Enterprise Network Architectures to include routing/switching, common protocols (DHCP, DNS, HTTP, etc), and devices (Firewalls, Proxies, Load Balancers, VPN, etc)

Ability to recognize suspicious activity/events, common attacker TTPs, and perform logical analysis and research to determine root cause and scope of Incidents

Expertise with Cyber Kill Chain and have utilized the ATT&CK Framework

Have scripting experience with Python, PowerShell, and/or Bash

Ability to independently prioritize and complete multiple tasks with little to no supervision

Flexible and adaptable self-starter with strong relationship-building skills

Strong problem-solving abilities with an analytic and qualitative eye for reasoning

Strong verbal and written communication skills

Ability to communicate with all levels of audiences (subordinates, peers & leadership)

Additional Requirements

• Candidate must have technical hands on experience in the areas of incident detection and response, malware analysis, or computer forensics.
• All Department of Homeland Security SOC employees are required to favorably pass a 5-year (BI) Background Investigation.

Candidate will have at least one of the following certifications: SANS GIAC: GCIH, GCIA, GCFA, GPEN GCFE, GREM CISSP OSCP, OSCE, OSWP Preferred Qualifications Experience in cyber government, and/or federal law enforcement FISMA systems.

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: September 20, 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 $131,300.00 - $237,350.00

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 www.Leidos.com.

Pay and Benefits

• 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 [e-mail].

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.