Peachey has joined the company having headed up PR at Yahoo UK and consumer PR for Yahoo EMEA.
Before this, his 17 years of comms experience included stints at Phones4U and BT Consumer.
Last year, PRWeek reported that the company was on the hunt for agency support while being investigated by the Office of Fair Trading amid fears that it was preying on those in financial trouble.
The company recently reported that it had handed out more than 3.5 million loans, totalling £1bn, but faces a Government clampdown on the sector.
In November, it was announced that the financial services bill would be changed to allow a cap to be put on short-term loans from 2014.
Wonga.com confirmed the appointment but declined to comment further.
However, PRWeek understands the move is part of a wider strengthening of the company’s PR team.