Recently, ABC Co$.$ fired Mr$.$ Khan after $2$ years of service following the discovery that his academic history was fabricated. Prior to this, his work history was characterized by near$-$firings and strife with co$-$workers and management. On one occasion, he was accused of disclosing sensitive company information on social media but retained his job after convincing HR that he had never been told such conduct was unacceptable. On another occasion, he avoided having to perform a task on the basis of the argument that the task was not part of the responsibilities verbally conveyed to him during the hiring process. On the day he was fired, he was given the rest of the day to clean out his desk. He spent the time using his administrative access to plant logic bombs in the corporate network, the effects of which were still being felt long after he left. What administrative controls could have been used by ABC Co$.$ to mitigate the risk posed by employees like Mr$.$ Khan?