What key leadership roles has David Chubak held at Citigroup Citi in the past?
He has previously held key leadership roles at Citigroup Citi, including 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 key leadership roles has David Chubak held at Citigroup Citi in the past?

### Input: Not applicable

### Response:
He has previously held key leadership roles at Citigroup Citi, including CEO of Citi Retail Services and CEO of US Retail Banking.<|im_end|>