Web Page Optimization / Testing / Validation

I am looking for an expert in Javascript / CSS / XHTML 1.1 validation who I can use on a frequent basis (a few times a month). I want to send existing html pages that may be poorly written and receive an optimized (XHTML 1.1 validated) version in return... including a report on browser compatibility... guaranteed to work on every major browser - Mac/PC. Clearly there could be methods (Javascript, DHTML, etc.) used in the provided page(s) that cause incompatibility - when necessary, I would like this person to recommend other methods that will ensure compatibility across the board. It would be a bonus if you have a solid understanding of XML, XSL, XSLT, XPath, XQuery - I have a need for someone with this capability on other projects. The project you are bidding on will be a homepage and sub-page template. I will pay immediately upon receiving and testing source files... payment by PayPal or GaF.