Portrait photography should be part of the life blood of every business marketing plan.

It's an old cliche, but people really do buy from people and if you want your customers to connect your staff, the very least you can do is show the who they are talking to.

We produce staff portraits at the place of work, which has the double benefit of showing clients what the staff look like and what your business looks like.  yes, you could do this yourself, but that would almost certainly be a big mistake!

Is a portrait photography a statement about the sitter or nothing more than their likeness?

If you believe in the latter and have no intention of shifting your view, I would strongly suggest you keep staff portraits off your web site and staff hidden in a dark room where they can't even see each other other.  A portrait is nothing without personality.

If you believe that a portrait says something about the sitter please, please, please don't use selfies:  Cheap, nasty, vain and vulgar, unless your a photographer, in which case a low-brow selfie is a high-brow self-portrait (stop laughing - it's true).

Business portraits need to say something about the sitter, their and their place in the world.  And that's not an excuses for doing boring portraits of solicitors and creative pictures of designers - it's a bit more complicated than that. 

Ansel Adams, arguably the 20th centuries most renowned landscape photographer said, "There are always two people in every picture: the photographer and the viewer."  He didn't mention the sitter because he preferred mountains to people, but you get the idea. 

When shooting staff portraits the photographer has to consider the sitter, the business and the interpretation the businesses clients will put on the pictures.  So if you are boring accountant the last thing you want to look is boring:  If you operate in the health care sector, cool, calm, blue-suited professionalism may well be the order of the day.  If you deal exclusively with the creative industries you might want to reconsider the blue suit.

this is why you need to employ a professional photographer, one with an understanding of representation and media semiotics.  I'll leave you to Google that.