I'd want to be in a secretarial role, maybe the traditional office junior.
I suspect this is down to experiences in my life. It's not so much about the job title or role but more about how I'd present myself. Having graduated my first job was in a formal office setting and so, as male, I was required to wear a business suit. My female colleagues were dressed in feminine office-wear. Naturally, I wanted to dress as they did in blouses, skirts and heels.
In a way it was one aspect of sissy-hood denied to me. As an independent young man I was free to live a gender fluid lifestyle, presenting myself as male or female as I preferred. For a short period I had got to the point where I worked as male, but generally lived as socialized as female. Work would always have to be a male only thing. Whilst technically I would have the right to wear skirts to work, I can't imagine it would have helped my career.
My first job pretty much your standard office junior role. Lots of basic admin and coffee runs. As you can imagine; it sucked, but presenting myself in my feminine office wear and doing admin and coffee runs for strong business women would be nice.