Web-based System for UGS

I have a requirement to build a site using PHP or an OpenSource CMS. This website will have approximately 45 basic webpages, an Employee Login component, and an Admin Login component. In the employee login component, employees will be able to login to the site and create/search/delete/update there OWN timesheets. In admin login component, admins will be able to login to the site and will be able to create/search/delete/update ANYONE'S timesheets and print individual employee report or batch employee reports. This system should perform well and should be maintainable/scalable to include a bigger system for future. I will provide how the website should look like and will provide a link to current website for any content needed to be inputed in 45 bassic webpages, once I accept your bid. This is a small project and if I like your work I will consider you for maintanence/bug fixing/enhancement and even more development of other projects.