Virtual Assistant

I need a goal oriented Virtual Assistant whose duties vary day to day and on any given day may perform a variety of tasks which includes answering phones, scheduling appointments, maintaining calendars, scheduling and coordinating staff and other meetings virtually, prepare communications, such as memos, emails, invoices, reports and other correspondence, write and edit documents from letters to reports and instructional documents, manage accounts and perform bookkeeping. And the Virtual Assistant will be required to meet deadlines even though this is a work from home position.