[4] Dundon is the owner of Dunbrody Country House Hotel, in County Wexford, which also houses the Dunbrody Cookery School; the "signature chef" of an "Irish gastropub" located in Walt Disney World in Orlando, Florida; and the "face" of Las Vegas's Nine Fine Irishmen New York-New York Hotel located restaurant.

He has appeared many times on Irish, British, Canadian and American television, including The Afternoon Show on RTÉ One, BBC One's Saturday Kitchen, UKTV's Great Food Live, the Canadian Broadcasting Corporation, ESPN Cable and CBS's The Saturday Early Show.

[4] He then had a job cooking on a cruise liner in the Caribbean before furthering his career by spending eight years at the Fairmont Hotels and Resorts in Canada, at the age of twenty-two becoming the youngest ever executive head chef in the company's history.

[6] In February 2008, Dundon featured in the first episode of Guerrilla Gourmet, a television series which had six professional chefs attempt to set up their own temporary restaurant in an unusual location.

[8][9] Four of the fifty members of the boxing club prepare the food, including pigeon and tomato and poitín soup,[10][11] in the temporary kitchen.

[13][14] In April 2009, he helped launch the outdoor Taste of Dublin festival alongside fellow chef Thornton.

He could be seen throughout the 2000s on Today; SuperValu: Best of Real Food Miniseries; Heat; The Afternoon Show; Take On the Takeaway; Guerrilla Gourmet; On The Fly; Home Cooking and Family Food; Hip World Gourmet; You're Not the Man I Married; and Celebrity "Jigs ‘n’ Reels"; and BBC's Stuffed.

The high quality of the brand captured the attention of buyers worldwide and led to online retail partnerships with Kohl's, JC Penney, Bed Bath & Beyond, Best Buy, Amazon, Wayfair, Groupon, Hautelook, Bonton, Fab, and My Habit.

Dundon is featured on Ireland's national airline, Aer Lingus, inflight entertainment on all transatlantic flights and 'Modern Irish Food' will be transmitted on that channel until the end of 2015.

Dunbrody has been visited by U2 frontman Bono, President of Ireland Mary McAleese and BBC television personality and actor Graham Norton.