What is the term for an individual who is responsible for examining an organization's security requirements and determining the necessary infrastructure?

A Security Analyst/Consultant

Explanation:

In cyber security, the term security analyst or security consultant refers to the individual that is responsible for the maintenance, security and integrity of the organization's data. They do this by planning and carrying out measures that ensures the protection of the organization's systems and networks by constantly monitoring the organization's network and systems for security breaches so as to take neccesary actions. A security analyst/consultant must therefore posses good knowledge and skills in all aspects of information security.