Company 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 • BreachLock Website • Leadership Team • Meet the BreachLockers Video Series • Reuters Coverage • CEO Interview – Cybercrime Magazine • Seemant Sehgal Interview on RT4 & RTLZ