Ireland | Bachelor of Arts | Northern Ireland | Republic of Ireland | United Kingdom of Great Britain and Ireland | Master of Arts (postgraduate) | National Endowment for the Arts | Second Vatican Council | Master of Arts | Northern Territory | World Boxing Council | United States National Research Council | American Academy of Arts and Sciences | National Research Council | Electronic Arts | Privy Council of the United Kingdom | British Council | Museum of Fine Arts, Boston | Council of Trent | Council of Europe | Academy of Motion Picture Arts and Sciences | Northern Pacific Railway | Ireland national rugby union team | Tisch School of the Arts | mixed martial arts | National Security Council | Kimberley, Northern Cape | Institute of Contemporary Arts | École des Beaux-Arts | Legislative Council |
Mulholland was appointed the curator for the Northern Irish Pavilion at the 2005 Venice Biennale by the British Council Northern Ireland and the Arts Council of Northern Ireland.
He was elected a life member of the Irish Academy of Letters in 1951 to fill the vacancy due to the death of George Bernard Shaw and was a member of the Literature and Poetry Panel of the Arts Council of Great Britain and a board member of the Arts Council of Northern Ireland.