Prior to this, Aggarwal was working with private air travel services provider Flight Options as chief operating officer and chief strategy officer, a company statement said.
"Sanjay has energy and passion that SpiceJet needs at this crucial time. I have no doubt that he will contribute immensely to ensure that SpiceJet flies higher than ever before," SpiceJet Director Ajay Singh said.
Aggarwal succeeds Siddhanta Sharma, who resigned from the airline about three months ago.
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