What leadership roles has he previously held at Citigroup?
He has previously held the roles of CEO of Citi Retail Services and CEO of US Retail Banking.
Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What leadership roles has he previously held at Citigroup?

### Input: Not applicable

### Response:
He has previously held the roles of CEO of Citi Retail Services and CEO of US Retail Banking.<|im_end|>