Internal Network Penetration Tester

Xtreme Solutions CorporateAdelanto, California🇺🇸United StatesPosted Sep 16, 2026

Why This Role Stands Out

This role offers a fantastic opportunity to deepen your expertise in internal network penetration testing and directly impact the security posture of various facilities, developing invaluable skills in offensive security techniques. You'll thrive here if you have a strong background in Active Directory attack paths and enjoy hands-on testing in diverse environments, making this a compelling next step in your cybersecurity career. Apply now to join a team dedicated to strengthening defenses through proactive vulnerability discovery.

Quick Overview

Seniority

Mid Senior

Employment type

Full Time

Work mode

On Site

Location

Adelanto, California, United States

Active DirectoryHIPAAPenetration Testing

Job Description

Job Description Job Description Description:

Position Summary

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.

Key Responsibilities

• 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.

Requirements:

Required Qualifications

• 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.

Travel

Onsite travel required to department locations in San Bernardino, Colton, Redlands, Rialto, Fontana, Ontario, Rancho Cucamonga, Montclair, Victorville, Hesperia, Apple Valley, Adelanto, Barstow, Needles, Big Bear Lake, and Yucca Valley; travel, lodging, and per diem are firm-borne.