As a junior penetration tester, your job is to help improve the security of a computer network by attempting to find and exploit any vulnerability a threat might use. In this role, you may plan and execute evaluation tests, stay informed about current cybersecurity threats, and program software to help with penetration attempts. Junior penetration testers typically work under the supervision of senior penetration testers and may, in turn, direct entry-level employees and teach them how to use the various tools and techniques required for penetration testing. Most testers work regular hours, but employers may occasionally ask you for emergency help to address newly-identified threats.