In 1984, he joined
McKinsey & Co as management consultant and in 1990 became a partner of McKinsey Switzerland's senior management. Wuffli left as a CEO
UBS on 6 July 2007 and renounced about $10 million in payments. On July 7, 2007 UBS declined to comment on Wuffli’s leaving, only confirming that his departure, a decision which was taken in a regular board meeting in Valencia, Spain, was based on the review of the position. Analysts and investors suspected the drop in profits, hedge fund losses and the underperformance of its shares to be the reason, and as a possible indication of the bank’s shifting core business to wealth and investment management. In February 2009 it became known that multi-billion dollar write-downs had sparked the sudden 2007 departure of Peter Wuffli as CEO. In November 2018 it was reported that Wuffli had joined the new financial services operator Sygnum as advisor. In July 2019, Wuffli was nominated to Sygnum's board of directors. == Other engagements ==