Senior Penetration Tester

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 Sectorbrings together our digital transformation and IT programs, allowing us to better serve our customers through scale and repeatability.

The DHS Chief Information Security Officer Directorate (CISOD) ensures the Department’s compliance with all applicable securityregulations—includingFISMA, OMB circulars, Executive Orders, federal laws, directives, and policies—while maintaining a secure and trusted computing environment. Information security is a core mission enabler, essential to DHS operations and public service delivery.

We are seeking aSenior Penetration Testerto support offensive security operations across DHS applications, networks, and enterprise environments. The ideal candidate brings deep technical expertise, hands-on experience in vulnerability research and exploitation, and a collaborative mindset suited for a high-performing cybersecurity team.

Primary Responsibilities

• Conduct penetration testing activities aligned with DHS and industry best practices.
• Perform web application, network, and infrastructure assessments using commercial and open-source tools.
• Execute testing operations safely and in accordance with defined operational guidelines.
• Produce detailed reports outlining findings and actionable remediation recommendations.
• Partner with SOC, engineering, and defensive security teams to validate and remediate vulnerabilities.
• Support tool development, methodology improvements, and team-wide knowledge sharing.

Conduct penetration testing activities aligned with DHS and industry best practices.

Perform web application, network, and infrastructure assessments using commercial and open-source tools.

Execute testing operations safely and in accordance with defined operational guidelines.

Produce detailed reports outlining findings and actionable remediation recommendations.

Partner with SOC, engineering, and defensive security teams to validate and remediate vulnerabilities.

Support tool development, methodology improvements, and team-wide knowledge sharing.

Required Qualifications

• BS Degree with 12-15 years. Master’s degree in a related field with12 yearsof professional experience
• At least3 yearsof experience in one or more of the following:Incident detection and responseMalware analysisCyber forensics
• Incident detection and response
• Malware analysis
• Cyber forensics
• Proficiency with at leastthreeof the following tools:Kali LinuxMetasploitBurp SuiteCobalt StrikeTenable NessusWebInspectScubaAppDetective
• Kali Linux
• Metasploit
• Burp Suite
• Cobalt Strike
• Tenable Nessus
• WebInspect
• Scuba
• AppDetective
• One or more relevant certifications, such as: GPEN, GWAPT, GISF, GXPN, OSCP, OSCE, OSWP, OSEE, CISSP, or CEH.
• U.S. Citizenship required; must be able to obtain aTop Secret clearance with SCI eligibilityandDHS EOD.

BS Degree with 12-15 years. Master’s degree in a related field with12 yearsof professional experience

At least3 yearsof experience in one or more of the following:

Incident detection and response

Malware analysis

Cyber forensics

Proficiency with at leastthreeof the following tools:

Kali Linux

Metasploit

Burp Suite

Cobalt Strike

Tenable Nessus

WebInspect

Scuba

AppDetective

One or more relevant certifications, such as: GPEN, GWAPT, GISF, GXPN, OSCP, OSCE, OSWP, OSEE, CISSP, or CEH.

U.S. Citizenship required; must be able to obtain aTop Secret clearance with SCI eligibilityandDHS EOD.

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:

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:

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.