Looking for Virtual Assistant for CEO

As the CEO of a growing company, I am looking for part-time administrative support to help me stay organized and on top of my tasks. Specifically, I am looking for someone who can help me with scheduling, data entry, create documents. Must be a very organized person, who is proactive. If you are good with Marketing, it would be a strong plus.
My ideal candidate is detail-oriented and reliable; someone who can make my life easier.