wordpress designers?

[the_r_sole]

I am currently in the process of looking at our company online offering as part of a bigger company focus exercise.
I have a fair bit of previous experience using wordpress sites and altering themes etc but usually its a learning on the job type of affair rather than understanding the fundamentals.
Do you get web designers that specialise in wordpress and/or would it be normal to tell them that you want to use that platform and only really require a theme to be built - don't really want to insult a designer if that's not normal but I kind of know what i want and how I want things to work...

 

[the_r_sole]

Thanks folks, I've found some relatively close that I will get a price from (and see some examples of what they can.do)