Upmarket women's clothing label St John Knits International Inc has hired Glenn McMahon, the president of Dolce & Gabbana USA, as its new chief executive.

McMahon is due to take up his new role on 1 September and fills a post that has been vacant since former CEO Richard Cohen made a surprise exit from the company in April 2006.

Interim chief executive Bruce Fetter will resume his prior roles of president and chief operating officer.

McMahon, who oversaw Dolce & Gabbana and D&G's wholesale and retail business in North America, as well as Dolce & Gabbana's business in Latin and South America, has also held posts at Ellen Tracy Inc, Giorgio Armani Le Collezioni USA, and Donna Karan International Inc.

Richard Cohen was hired to revitalise the company in June 2004, but was criticised for alienating the core over-40s customer with new, trendier fashions. Cohen also signed high-profile actress Angelina Jolie as the new face of the brand in September 2005.