CSS Designer Required for Oscommerce Zencart

We require a web designer who can optimize CSS on carts which are based on Zencart and Oscommerce The designer should be capable of making the CSS changes and uploading the same on the server. This current project involves optimizing CSS for one website which involves : All checkout pages Create/Edit Account Page All Address Pages The above pages should match to a sample will provide , our website is responsive so this should be taken care of. The new pages should match to current website color, no new graphic of any kind is required. Previous experience of Zencart/Oscommerce designing is preferable, please reply with the same. Ongoing work can be provided.