What positions has Pablo Roldan held in the past?
Pablo Roldan has held positions at ITAM in Mexico City and the University of Maryland, College Park, where he completed a postdoctoral fellowship.
Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What positions has Pablo Roldan held in the past?

### Input: Not applicable

### Response:
Pablo Roldan has held positions at ITAM in Mexico City and the University of Maryland, College Park, where he completed a postdoctoral fellowship.<|im_end|>