Answer:
expert power
Step-by-step explanation:
Based on this scenario it seems that the individual employee is trying to attain expert power. This refers to the use or perception of expert knowledge in order to get another individual to follow your instructions or orders. In this scenario, by putting up diplomas and past awards the new employee is trying to show everyone that he is an expert in that specific field and that any statement or order given by him regarding that topic should be obeyed.