I work in a factory, and the potential to move up to shift lead is all but given to me by my peers. Ive had several bosses and colleagues (who's opinions and world views align with us) tell me I need to become the lead. The guy I would be inheriting this role from even says I'm the best fit.
However I ain't trying to be some class traitor. I do like the thing we produce, it's been a part of my life for my entire conscious existence. I'm a lucky sucker who followed their passion and while I'm a wage slave, seeing people, even if it is the upper class, deriving happiness from the things I make make me care about the things I produce. I do want to use this position to make the product and the workers lives better. Management already understands I side with labor more often than not.
I am really good at what I do and I have tons of issues believing in myself, but it's hard to ignore the world telling you you got to do this.
Bettering your material condition through advancement in the workplace is not being a class traitor. Your relationship to the means of production have not changed and unless you allow yourself to be used as the face of senior management for the purpose of discipline you're still a worker.