Concept artist needed - Space combat game (PC/Mac/Linux)

I'm currently developing my first indie title, a space combat game, targeting desktop platforms (PC, Mac and Linux). I aim to release a first alpha version within the next six months.

I'm looking for a concept artist who can take on the following responsibilities:

• Creating a progression between low and high tech visual styles
• Designing modular components that produce convincing spaceship designs
• Producing sketches for other artists to work from (modelers, texture artists)
• Creating high quality images for promotional material

Payment will be made on an hourly basis.
Hours: 20-25 per month