A headshot for the job you actually do

Yes. A clinical role reads better in a plain setting with even light; a creative role can carry a styled background and a more relaxed expression; a corporate role wants a suit and a neutral backdrop. The person is the same — the signals are different.

You can, and most people do. If you use LinkedIn, a company directory and a conference bio, a single professional portrait in business dress works for all three. Add a second, more relaxed version for social profiles if you want variety.

For clinical, trades and uniformed professions, a plain version of your work clothes — or a clean shirt in the same colour — usually reads better in a portrait than a full uniform, which can look like a stock photo. Keep the uniform for the ones that require it.