Mueller, who joined the bank in 2010, will hand over his responsibilities to Marcelo Szerman, head of corporate center and logistics and a fellow member of the bank's executive board. 

“As a result of certain changes in the CFO division, the bank and Thomas A Mueller have agreed that Mr Mueller will be leaving the employment of Bank J Safra Sarasin with effect from 30 September 2016,” a spokesperson for the bank said in a statement when contacted by WealthBriefing.

Mueller will also leave the boards of Bank J Safra Sarasin in Germany and Bank Zweiplus. In January, he took on the position of chairman of the Swiss Takeover Board, a federal commission overseeing compliance in public takeovers, according to its website.

In other recent high-level movements, Benedikt Maissen became chief executive at the bank's Singapore branch earlier this month. In March, J Safra Sarasin Group agreed to acquire Credit Suisse (Monaco) and Credit Suisse (Gibraltar) for an undisclosed sum.