Oh my word, yes! I talked my way into an IT manager position based on occasionally filling in as a systems administrator while holding a job as a tech writer and programmer, and being two tech articles ahead of my interviewer. (Also desperation on the part of my new company, who’d had the old IT manager quit suddenly.) I wasn’t worried (not worried worried) because there was a kid there already who knew the local system, I would do the management side while he did the tech side, I’d pick up some pointers here and there and things would be great!
The kid quit three months after I got there.
So I worked longer hours and got my hands dirty and figured things out and hired a new guy who didn’t know much more than I did but who also figured stuff out and we kept the company functional.
So I’m a big believer in “fake it until you make it.” Mostly because I’ve made it.