Another image of a doctor, this black and white graphic has a bit of a retro feel to it.
Mad scientist or researcher in a white lab coat.
Man in a blue business suit and tie, sitting at a desk holding the phone.
Woman working at a desktop computer, could be a CEO, secretary, novelist or maybe she's writing email.
A spy wearing a dark trenchcoat and holding a gun and briefcase. This image is pretty large, so you may need to resize it depending what you're using it for.
- Clipart of People at Work: