I'm looking for a word that has the opposite meaning of the word nominal in the sense of in name only.
Here's an example (fill in the blank).
Brian was in charge of scheduling in his [ ] role as Project Manager.
He was often expected to carry out Project Management duties, even though his business card identified him as a programmer.
De facto sort of works, but I feel like the connotation of (in my example) having the role by tradition or default doesn't fit what I am trying to say.
I am essentially looking for a term that means we don't call it that, but in practice it really is.