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Closed on August 14, 2026.
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Senior Penetration Tester
Senior
Cloud Platforms
Cybersecurity Tools
Information Security
InfoSec
Investigative Skills
Penetration Testing
Security
Security Testing
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Job Description
Senior Penetration Tester at S1T coordinates and executes penetration testing across Cloud, Web, and Network environments, engaging directly with customers and coordinating across cybersecurity teams.
Responsibilities
- Support the technical delivery of penetration testing across Cloud, Web, and Network environments, including scoping, test plan development, and hands-on testing to validate security controls.
- Participate in customer interactions, including planning sessions, kickoff meetings, and debriefing discussions to align objectives and expectations.
- Collaborate with other cybersecurity teams as needed to ensure coordinated findings, risk assessments, and remediation guidance.
Requirements
- U.S. Citizenship or Green Card holder
- Highly organized and detail oriented, with a structured approach to planning, evidence collection, and reporting
- Strong written and verbal communication skills, including the ability to articulate technical concepts, impacts, risks, mitigations, and remediation guidance to diverse stakeholders
- Advanced experience with common penetration testing toolsets across multiple environments
- Ability to perform penetration testing with minimal reliance on automated tools, emphasizing manual techniques and analytical reasoning
- Experience working in a large government or military environment
- Expert-level understanding of networking protocols and web application architecture
- Strong familiarity with Java and .NET based web applications
- Expert-level familiarity with both Windows and Unix operating systems
- Minimum 5 years of relevant penetration testing experience
Technologies
- Java
- .NET
- Windows
- Unix
- Python
- Bash
- Perl
- PowerShell
- Open-source testing tools
- Active Directory
- Microsoft SQL Server
- Oracle
Benefits
- 401(k)
- Dental insurance
- Employee discount
- Health insurance
- Life insurance
- Paid time off
- Parental leave
- Professional development assistance
- Retirement plan
- Tuition reimbursement
- Vision insurance
Pay
- Salary: USD 126,299 - 152,102 per year
Location
- Hybrid remote in Washington, DC 20240
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