I used to take 3 jobs,and two of them involves sending E-mail in English.
I ever got three times job, among this the duty of two times job was related with e-mail sending in English language.
我只是为你增加一种表达的方式。
I used to take 3 jobs , two of which were relevent to releasing English E-mails.
the responsibility for two of them的表达也可以,我觉得。