I would like to hire a Sharepoint Developer -- 2

I want a small business sharepoint site set up, using/converting our exisitng sharepoint access points and accounts. I need someone wwith a broad and specific knowledge of how sharepoint works and how it can be customised to suit the needs of our own business., which will the following: 1) a central place for the whole team ( up to 20 users), 2) control and management of tiered access for these users. 3) The creation of a full workflow specific to our organisation with various approval steps integrated into the system. We require someone who has worked for marketing agencies, and/or event managemnet companies and has references to prove this.