Niall is the founder of IrishCentral as well as of Irish America Magazine and the Irish Voice Newspaper, both successful publications. He is also responsible for publishing IrishCentral.com community news and The Irish Emigrant newspaper in Boston.

He founded the Wall Street 50, Top 100 Irish Americans, Business 100 and more recently the Top 50 Women in Business as well as the Irish Legal 100.

Niall was awarded an honorary doctorate by University College Dublin for his work on the Irish peace process, which was a subject of a book, 'Daring Diplomacy' and a PBS Special, 'An Irish Voice' He is also an adjunct professor at Columbia University journalism school.