New partiner for our develop team

Hello, We have some long projects and we are searching a partner for help our team. Basically we work with office intranets and integrating HTML5 templates with mysql databases, using PHP webservices, AJAX and JSON for store datas. We keep some applications developed by our team in EXT JS + PHP + MYSQL too. This new partner will work in little tasks the projects for fast return. Our intention is to maintain a fixed amount of hours per month ( 50 60 ) with this new partner, so we are searching someone responsible for a long partnership. Regards.