By Elisa Martinuzzi LONDON (Reuters) – Credit Suisse investment bank chief Christian Meissner will be leaving the Swiss bank once it has announced a strategic overhaul, a person with knowledge of the matter said on Monday. Announcement of his departure is expected to be made along with the bank’s strategic review and quarterly earnings on Oct. 27, as first reported by Bloomberg News. A Credit Suisse spokesperson declined to comment when contacted by Reuters. Meissner was not immediately available for comment.Meissner, who joined the bank in 2020, had in August been tasked with overseeing the s…