Photography

Can someone who's pretty experienced with shooting headshots do it with one speed light? Yeah, absolutely. But if you're asking this question in here, I'm thinking you're not very experienced. Especially for corporate work. These are people who generally aren't happy with how they look - #1 question is always 'you're going to make me look thin, right?' - and they aren't models, so they have no idea how to pose. So it's up to you to infuse confidence in them that you know what you're doing, and to impress them. When I do corporate work, I use a minimum of 3 lights, and a reflector. I'm tethered to a MacBook so they can see the photos and choose their favorites. It's important to get it as close to finished as possible right in the camera, because you don't want to have to edit a ton of photos just to make them presentable, especially if they're only choosing one. Do you have a backdrop? Or do they want them taken in an office? Outdoors? If anything, I'd give the job to a more experienced headshot photographer and tag along to see how it's done.