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Posted Jun 5, 2026

Penetration Tester - Practitioner

(this position is US based remote) Overview • Perform network-based penetration testing for our clients to identify, assess, and report on vulnerabilities in their public facing infrastructure. • Perform penetration testing on web applications and APIs (internal and external) to identify, assess, and report on vulnerabilities in their applications. • Perform red team exercises to determine where weaknesses in the client's infrastructure and how it should be remediated. • Write clear, concise, effective deliverable reports for clients to help them understand their risk posture and how they can reduce it. • Advise clients on security best practices including application design, infrastructure architecture design, and other considerations. • Collaborate with other Crosslake practitioners to socialize penetration testing best practices. Requirements • Be an apprentice tester for your first 2 projects and then be willing and able to drive a project on your own to successful completion. • Participate in and drive penetration efforts on behalf of clients, collaborating, digging deep, and creating a report for the investors to outline technical vulnerability and risk. • Deliver at least one network, API, or web application penetration test every week. • Work with private equity companies and other investment firms to help them understand the existing technology risks and vulnerabilities that exist in their environment or portfolio. • Collaboratively work in partnership with internal and client technical leads and team members to ensure that planning and execution of penetration testing efforts occur in a timely fashion and reports are of high quality. Crosslake Technologies