The funny thing about a reputation is how it amplifys over time.
Take someone however uncomfortably through a change process. Authentic. Actionable. Generous. They'll tell 5 people. 5 people who care and who will then tell 5 more.
Piss someone off by being false, inflexible or selfish and they will tell 20.
Your reputation literally proceeds you.
Have the hard conversations early. Persistently show up with diligence. Ask questions and give less answers. Produce things with excellence. Navigate difficulty with calm. Connect people.