> Markdown version of [/jobs/ext/2941925-internal-network-penetration-tester](https://www.wearedevelopers.com/jobs/ext/2941925-internal-network-penetration-tester). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Internal Network Penetration Tester - **Company:** Xtreme Inc - **Location:** Adelanto, CA, United States - **Experience:** Experienced - **Contract:** Permanent contract - **Skills:** Password Cracking, Active Directory, Software System Penetration Testing, Data Centers, Phishing - **Published:** September 16, 2026 - **Apply:** https://find.jobs/jobs-near-me/apply/ats-redirect/?id=2973721735-2 ## About the Role * 4+ years of internal/network penetration testing experience, including Active Directory attack paths. * Comfort working onsite at client facilities, including data centers and administrative offices. * Experience with internal recon and lateral movement tooling (BloodHound, Responder, or equivalent). Preferred Qualifications * OSCP or GPEN certification. * Experience testing in HIPAA-regulated or government network environments. ## Description Executes internal network penetration testing from two pre-determined footholds - an unauthenticated physical network port and a simulated-phishing authenticated workstation - across County facilities, testing servers, workstations, endpoints, and password strength., * Physically connect to County network ports to simulate an unauthenticated internal attacker. * Simulate a successful phishing/Trojan compromise from an authenticated workstation foothold. * Attempt password cracking and lateral movement while evading department detection and response efforts. * Document internal attack paths, exploited vulnerabilities, and business impact for each department report.