Senior Penetration Tester (US)
BreachLockCompany Description
BreachLock is a global leader in Offensive Security including Red Teaming, Continuous Attack Surface Discovery and Penetration Testing services. We help organizations discover, prioritize, and mitigate exposures with evidence-backed Attack Surface Management, Penetration Testing, and Red Teaming. BreachLock provides an attacker's perspective that goes beyond standard vulnerabilities, enabling organizations to build a comprehensive, proactive defense strategy.
Role Description
Penetration Tester (Mid-Senior) | Full-Time | Remote (US)
As a penetration tester on BreachLock's US Strategic delivery team, you'll execute manual, methodology-driven engagements across web applications, APIs, and internal networks — including assumed breach simulations — for enterprise clients. You'll work directly with delivery leadership, contribute to internal tooling and quality systems, and help raise the bar for the team around you.
Key Responsibilities
- Execute web application, API and mobile penetration tests with a focus on manual testing beyond automated scanning — business logic, authentication abuse, authorization flaws, and injection chains
- Conduct internal network assessments, external network assessments and assumed breach engagements, including Active Directory enumeration, lateral movement, privilege escalation, and post-exploitation
- Leverage frameworks including MITRE ATT&CK, PTES, and OWASP to structure assessments and findings
- Develop and contribute to internal tooling — automation scripts, reporting utilities, and workflow improvements using Python, Bash, or similar
- Participate in QA review cycles, providing structured feedback on findings, CVSS scoring accuracy, and report quality
- Mentor junior testers through technical guidance and finding review
- Collaborate with delivery leadership on scoping, client kickoff calls, and remediation guidance
Requirements
- 3–5 years of professional penetration testing experience in a delivery or consulting context
- Strong web application and API testing fundamentals — Burp Suite proficiency, OWASP Top 10 and beyond, authentication and session management testing
- Solid internal network assessment skills — AD enumeration, Kerberoasting, NTLM relay, ADCS misconfigurations, assumed breach methodology
- Proficiency in scripting and automation (Python, PowerShell, Bash)
- Strong written communication — capable of writing clear, accurate, well-scoped findings independently
- Familiarity with PTaaS delivery models or platform-based reporting workflows is a plus
- US-based and eligible to work without sponsorship
Preferred
- Experience with C2 frameworks (Cobalt Strike, Havoc, Sliver, or similar)
- Active involvement in cybersecurity communities, research, or bug bounty programs
- Certifications such as OSCP, BSCP, CRTO, GWAPT, GPEN, or equivalent practical credentials
- Experience with SIEM platforms or EDR tools from an adversarial perspective
Benefits
- Competitive compensation and performance-based equity opportunities
- Flexible work hours with hybrid remote options
- Opportunity to work with international cybersecurity experts
- Strong career progression in a rapidly expanding early-stage company
- Exposure to cutting-edge research, tools, and techniques in offensive security
Additional Organization Details