The record try scorer for the All Blacks has been involved in professional rugby for fifteen years, during which time he played for Super Rugby sides the Highlanders, the Hurricanes and the Blues before joining Munster in January 2008.
As a professional athlete Howlett has negotiated numerous commercial opportunities over the years with regards his own playing contracts and personal endorsements, and he will now call on this experience and acquired skills for the benefit of his adopted home club.
This newly created role is one of a number of initiatives proposed by the Munster Rugby Commercial Board and for now the charismatic winger will look to secure corporate support for the province.
There will be a further announcement on other exciting commercial developments instigated by the Board in the coming weeks.
Chairman of the Commercial Board Niall FitzGerald KBE, who has been instrumental in Doug's appointment, said: "As the Ambassador for Munster Rugby, Doug will bring the tactical insight, special skill and outstanding leadership that marked him as a player.
"The Commercial Board is greatly strengthened by this exciting addition to the team."
Commenting on the role, Howlett added: "I am thrilled to continue my association with Munster Rugby. I am excited by my new team and this new challenge. I look forward to helping Munster Rugby remain at the forefront of European rugby."
Niall FitzGerald: Chairman, Hakluyt & Company Ltd
Patrick Coveney: CEO, Greencore
David Cronin: CEO, UL Foundation
Leslie Buckley: Chairman, Independent News and Media
Tony Keohane: CEO, Tesco Ireland
Ken Murphy: COO, Alliance Boots
John Herlihy: Vice President, International SMB Sales and Head of Google Ireland
John Hartery: President, Munster Rugby
Garrett Fitzgerald: CEO, Munster Rugby
Gerry O'Loughlin: Independent Chairman, Management Committee, Munster Rugby
Tom Kinirons: Independent Chairman, Finance Committee, Munster Rugby
Enda Lynch: Commercial and Marketing Manager, Munster Rugby
For details about the Commercial Board's announcement last March, please click here.