Final answer:
The Safety-shield employees who test the security measures of an organization's information systems are called Ethical Hackers, Cybersecurity Analysts, or Penetration Testers.
Step-by-step explanation:
The Safety-shield employees who test the security measures of an organization's information systems to ensure they are protected against intrusions are called Ethical Hackers, also known as Cybersecurity Analysts or Penetration Testers. These individuals use their expertise to identify and exploit vulnerabilities in the system in order to provide recommendations for improvement.