Answer:
Expert power.
Step-by-step explanation:
Expert power can be defined as a high level of skill and knowledge which an employee working in an organisation has over other workers. It can also be described as the special skills possessed by an individual which is required to excellently complete a task.
Individuals with expert power have a lot of confidence and can therefore function as a leader, this is due to their ability to influence others.
In the scenario described above, Gerald is perceived to have an expert power due to his ability to present articles to interns in a simple manner, assist the project managers with scheduling, and giving the CEO of the organisation advice on important matters regarding the growth of the company.