Daniel Rooney was appointed US Ambassador to Ireland on the 1st of July, 2009. Ireland's ambassador to the USA is Michael Collins.
The current British ambassador to Ireland is David Reddaway.
An ambassador is a senior civil servant that is sent abroad to represent his or her country overseas.
Eklil Ahmad Hakimi is the Ambassador to the US for Afghanistan.
Mohamed Tawfik is the Ambassador to the US for Egypt.
Tatoul Markarian is the Ambassador to the US for Armenia.
Josko Paro is the Ambassador to the US for Croatia.
Peter Taksoe-Jensen is the Ambassador to the US for Denmark.
Hans Peter Manz is the Ambassador to the US for Austria.
Ireland has ambassadors from many countries, so it depends on which country you mean.
Hersey Kyota is the Ambassador to the US for Palau.
Nestor Mendez is the Ambassador to the US for Belize.