Universities in the UK have two distinct titles (among others): "lecturer" and "reader". A reader is more senior than a lecturer but both are below a professor. The US (rough?) equivalents are "assistant professor" and "associate professor".
I would translate both of these words into Latin as lector or lectrix. Perhaps I could translate "lecturer" as lector/lectrix and "reader" as lector/lectrix senior, but I wonder if there is a better way. How do you suggest translating the two titles? Do such translations already exist, canonical or not?