Open-world Mars exploration game looking for a Concept Artist

I have begun development of an open-world exploration game set on Mars. We currently have a small team of programmers and 3D artists, but we are in desperate need of a traditional 2D concept artist. We are looking for someone who can create unique landscapes and terrains as well as conceptual planetary exploration vehicles, spacesuits, and habitats. This is not a paid position currently, but our goal is to build a visually representative prototype to help promote a future kickstarter campaign. The images below are from our recent art tests in Unity which we will be using to develop the game. Please post links to examples of your work, or email them to me at randomseedgames [at] gmail.com