He was eventually given the position as a manager thanks (thank)to his good preparation for the interview.
翻译:
多亏他为面试做了充分的准备，他最终获得了经理的职位。
知识点解析:
固定短语 + 被动语态。thanks to 意为“多亏、由于”，常引导积极的原因；be given the position 是被动语态，表示“被授予/获得职位”。