What roles has Lev Feldman held in the information security field?
Lev Feldman has held significant roles at large global enterprises, including Senior Vice President in the CISO Office of Citigroup.
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### Instruction:
What roles has Lev Feldman held in the information security field?

### Input: Not applicable

### Response:
Lev Feldman has held significant roles at large global enterprises, including Senior Vice President in the CISO Office of Citigroup.<|im_end|>