I consistently tell the truth and am fair with my employees. furthermore, i feel a strong moral obligation to make decisions that do not infringe on the rights
I believe the correct answer is: Deontological ethical theory.
In moral philosophy, deontology (or deontological ethnical theory) is an ethical theory which judges the morality of an action based on whether that action itself is right or wrong under a set of rules. One of the examples is that killing is wrong even if it’s self-defense.
Given that he consistently tells the truth, is fair with my employee, feels a strong moral obligation to make decisions that do not infringe on the rights of my staff, he is applying the concepts of deontological ethical theory.