I am a student working in the IT department of my college campus. Typically, since we service both students, staff, and faculty, sometimes we run into the issue of addressing our own teachers. I would like to address them in a respectful way that also makes sense regarding the situation.
If I am working with one of my own teachers, it sometimes feels awkward to address them by the title of "Doctor" or "Professor". On the other hand, addressing them by their first name can appear too casual along with not attributing a level of respect to them.
Has anyone else experienced this issue? What different ways can I address my own teacher if they are also my customer who I'm helping?