Being a director can not make everyone happy. This means that you need to tell someone when you are doing something bad.
If someone is having problems with other staff or volunteers, I will mediate between the two people and try to find a solution in both of them.
If a colleague does not work well for personal reasons, it is out of the field and it is not good for your company. In this case, please make sure that it is the targeted working environment and that personal problems remain on the door.
If someone does something you dislike, you need to resolve what is happening and what to do to show a precedent. Training is easy if it keeps happening. In these questions, you may support one party and discomfort the other party, but please clearly indicate that you make a decision based on factors that are beneficial to the company.
This allows you to try to improve the company, not targeting specific people. Some people may be offended, but if your company does not make people angry, then disadvantages outweigh the benefits.
Do not forget that everyone is susceptible to different attacks. It changes over time and there are so many factors to solve. The best thing you can do is to avoid making it personally and to understand that you sometimes offend someone. Please do your best.
Stop mediation, this is not your job, it only solves the problem by giving it credibility and depriving them of their behavior.
Let them (together with people in the Human Resources department) tell them that their quarrels are affecting wider teams and must stop them. You do not mediate anymore and you tell them that you are responsible for their actions. Give a deadline and allowance for making a relationship plan. This should detail the when and how to communicate, what they are responsible for, and so on (it basically covers everything that could lead to controversy). When you give them they will give them space to do whatever they need to complete it, and you are ready to put resources into it to achieve it. That is wonderful. If they do not explain it, it may lead to disciplinary action, that is, they have the opportunity to change, but they are not professional. They are clearly defined and can not be protested. First signs of disagreement after planning, direct disciplinary action - prove it and follow the instructions of the book.
The basic approach I take is almost the same as trying to resolve a conflict at work; if there is some kind of discussion between my colleague and I, I will solve the problem between the two adults I will try to solve without it. It was brought to a manager or other third party agency. Even in the triad, so far, if there is a contradiction between us, we generally agree to resolve it first. Sometimes, some say that you need to inform the other party. On that side, we sometimes feel the need to talk to each other. This makes sense, especially if you are one of your family members; partners in your life may accept hints on specific matters.
Whether you are a manager or an employee, you may need to resolve conflicts at some point in your work. This includes resolving issues between the two staff, between you and a colleague, or between the customer and the company. You should be able to listen to the opinions of the parties fairly and be able to use creative problem solutions to find a solution. Being an excellent administrator who is a member of an employee or a colleague can express understanding and sympathy for others. For example, if a customer or colleague requests complaints, you need to listen carefully to those concerns and express sympathy for their problems. Empathy is an important skill that can help you get along with everyone in the workplace.