Offensive Security Engineer: Build & Break Secure Systems

AI Chopping Block; Washington, Northern (District of Columbia, KY); Hybrid; USD 180,000 - 240,000; Full time

Job summary

Palantir in the United States is seeking an experienced Offensive Security Engineer to test internal applications and infrastructure, and to help design agentic tooling for live assessments. You will coordinate third-party engagements, reproduce and verify fixes with engineering, and translate findings into prioritized business risk and remediation actions.

This role requires strong pentesting skills across web apps, networks, AD, and cloud environments, plus the ability to write code to

Qualifications

• 4+ years of professional experience in offensive security, penetration testing, red teaming, or a closely related field.
• Willingness and eligibility to obtain a U.S. security clearance preferred.
• Proficiency in at least one scripting or programming language (e.g. Python, Go) sufficient to build and adapt your own testing tooling.
• Demonstrated experience assessing the security of cloud (AWS, Azure, or GCP) and containerized (Docker, Kubernetes) environments.
• Excellent organizational instincts, with the ability to keep multiple streams of work moving in parallel and to track each through to verified completion.
• Clear written and verbal communication, including the ability to explain a vulnerability, its impact, and its fix to the engineers who need to act on it.

Responsibilities

• Conduct hybrid web application penetration tests that combine source code review with runtime exploitation across our products and internal tooling.
• Perform external network penetration tests against internet-facing infrastructure, identifying exposed services, misconfigurations, and paths to obtain an initial foothold.
• Perform internal network and Active Directory security assessments, identifying privilege escalation paths, lateral movement opportunities, and misconfigurations.
• Assess the security of cloud and containerized infrastructure, including identity, network, and workload configurations.
• Collaborate with detection engineering to validate telemetry and detection coverage against real-world attack techniques uncovered during engagements.
• Scope and manage third-party pentest engagements end-to-end, critically review results, and work cross-functionally to convert findings into prioritized, actionable remediation.
• Partner with engineering to reproduce, prioritize, and verify fixes for the issues that are surfaced.
• Design and build offensive security tooling and automation tailored to Palantir's stack.
• Author clear, actionable write-ups and readouts for technical and non-technical stakeholders, translating findings into business risk and prioritized action.

Skills

Penetration testing

Web app pentesting

Network pentesting

Cloud security

Container security

Scripting (Python/Go)

Communication

Tools

Burp Suite

BloodHound/SharpHound

Certipy

Impacket

Responder

Pacu/ScoutSuite

Nuclei

Job description

Palantir in the United States is seeking an experienced Offensive Security Engineer to test internal applications and infrastructure, and to help design agentic tooling for live assessments. You will coordinate third-party engagements, reproduce and verify fixes with engineering, and translate findings into prioritized business risk and remediation actions.

This role requires strong pentesting skills across web apps, networks, AD, and cloud environments, plus the ability to write code to