后半部分的 and finally the manager ofthe company 是定语从句中的并列部分，省略了与前文重复的语言信息。
主句：there was a man
定语从句： with whom I would have to work together and finally the manager of the company.
【第一分句】with whom I would have to work together 我得（先）与他共事
【第二分句】and (with whom) finally the manager of the company (has to work together) 最后是公司经理（与他共事）
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