Senior Offensive Security Engineer

Parry Labs, LLC; Dallas (TX); Hybrid; USD 120,000 - 180,000; Full time

Job summary

Parry Labs in Dallas seeks a senior security engineer to lead authorized offensive security assessments of software, networks, and distributed mission systems. You will identify vulnerabilities, demonstrate impact, and work with engineers to verify fixes, reporting to a functional engineering manager with direction from the Chief Engineer.

The target start is November 2026. The role requires 7+ years of security engineering, experience with Python tooling, Rust/C/C++, and U.S.

Qualifications

• Bachelor's degree in cybersecurity, computer science, engineering or a related field, or equivalent relevant experience.
• 7+ years of security engineering experience, including hands-on offensive testing or vulnerability research.
• Experience with authorized penetration testing, protocol analysis, fuzzing and vulnerability assessment.
• Ability to review Rust or C/C++ and develop security test tooling in Python or a systems language.
• Experience analyzing Linux and network behavior, including TCP/IP, service configuration and access controls.
• Experience producing reproducible findings, explaining security impact and verifying remediation with engineering teams.
• U.S. citizenship and eligibility to obtain and maintain a U.S. government security clearance if required.

Responsibilities

• Develop threat models and security test plans linked to system requirements and potential failure modes.
• Define authorized test scope, rules of engagement and stop conditions with program stakeholders.
• Conduct penetration testing, protocol analysis and vulnerability research in approved test environments.
• Build protocol and parser fuzzing tools. Add repeatable security checks to automated test workflows.
• Assess Linux services and network interfaces. Review Rust or C/C++ code for security weaknesses.
• Evaluate authentication, digital signatures, replay protection and key handling with software and cryptographic engineers.
• Document reproducible findings, impact and remediation priorities. Retest fixes and preserve test evidence.
• Support red-team and blue-team exercises. Keep assessment signoff separate from implementation ownership.

Skills

Security testing

Vulnerability research

Penetration testing

Python tooling

C/C++ review

Linux & TCP/IP

US Citizenship

Education

Bachelor's degree in cybersecurity or related field

Tools

Rust

Python

C/C++

Job description

Parry Labs in Dallas seeks a senior security engineer to lead authorized offensive security assessments of software, networks, and distributed mission systems. You will identify vulnerabilities, demonstrate impact, and work with engineers to verify fixes, reporting to a functional engineering manager with direction from the Chief Engineer.

The target start is November 2026. The role requires 7+ years of security engineering, experience with Python tooling, Rust/C/C++, and U.S.