William Hill said the head of its online operations is leaving the company, joining a slew of other high-profile departures and putting further pressure on Britain's biggest bookmaker.
The loss of Andrew Lee follows the exit of finance director Neil Cooper, who left last year to join Barratt Developments.
Meanwhile, Kristof Fahy, its chief marketing officer, joined rival Ladbrokes.
Andrew Lee joined the company in 2012 and was responsible for William Hill's digital arm, having worked as a gambling analyst for over 10 years.
His departure comes at a time when the tougher regulatory environment and advances in mobile technology are changing the face of the gambling industry, with physical bookmakers' shops closing as companies focus on boosting online sales.
Lee will be leaving the business at some point in 2016, the company said, as it appointed Crispin Nieboer as interim managing director of online operations.
The betting group also named Kevin O'Connor as its chief information officer. O'Connor joins from S&P Capital IQ and was previously chief information officer at rival Paddy Power.
William Hill today reported 2015 operating profit of £290m, in line with market expectations.
