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especially with 000 context. the answer given is the bog standard translation. if you had doubts, you should have provided context and not closed the question within a couple of minutes without waiting to hear from others or at least one native of either source or target language.
un responable=manager, un compte = account and un client = customer or client.
So, if you put all that together and try to google "customer account manager", you should arrive at the translation without much difficulty