But instead of handing it over, the 39-year-old kept it a few days later to sell it for £ 1,000, Leicestershire Live reports.
Sentencing her, Magistrate Beverley Cemmel said: “The value of the watch is important and it was a breach of trust.
“If someone loses something at an airport, they naturally expect a member of security staff to hand it over. ”
Leicester Magistrate’s Court learned last week how the watch went missing on March 6, after its owner forgot to collect it after going through a metal detector before a theft.
The victim only realized what had happened when she was in the air, but by then airport staff had found the watch.
They put it in their lost property box before moving it to a secure storage area when they realized its value, the court was told.
Derrie, from Loughborough, returned to work the following Monday, finished her shift and boarded the Skylink shuttle to return home to Loughborough.
She says she found the watch in a brown padded envelope under her seat during her trip.
Derrie took the Rolex to her house in Peel Drive and then visited a branch of Cash Converters.
The store initially offered him £ 2,000 for it, but after having it sent back for review he then reduced his offer to £ 1,000.
An investigation was launched and Derrie was found because she had used her real name and address in her dealings with Cash Converters.
Derrie, who worked on the airport security team for three years, pleaded guilty to one count of theft.
Debbie Hubbard, mixed, said: “She admits she should have handed it to the bus driver and not take it home and later sell it to Cash Converters.
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“It’s a breach of trust, but not a breach of trust – she sold it in her name and gave her address. The converters did not give him money immediately. They took it and sent it back.
“At first they said they would give him £ 2,000 but when they came back they gave him £ 1,000.
“She was fighting for money. She is a low income single woman.
“She told me that when she took the watch she had just paid her rent on her overdraft and was worried because she was living on the borrowed money.
“She’s not suspended, she’s been working all this time. She has an interview, a disciplinary hearing, and because she admitted this, it is inevitable that she will lose her job. ”
Derrie was ordered to pay £ 4,000 in compensation to the victim and to perform 80 hours of unpaid work.