我之前从事过经理助理的职务的翻译：Before I worked Assistant Manager positions 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

I had engaged in the duties of assistant manager

Before I worked Assistant Manager positions

In front of me has been engaged in assistant to work manager's duty

I have been engaged in before the functions manager assistant

Before I worked Assistant Manager positions