I have a mate who worked for serco and left the company in just 4 months. This review is all his experience that he shared with me. When he first went for walk in interview he was rejected, but then he went through a consultancy and only then he was hired. For almost a week the batch used to just sit ideally. Then later there was issue with the offer letter, bank account, id access not working. Though it was semi internatiinal bpo, its worst than a typical domestic bpo