Paul Walsh, 37, from Rhue, Tubbercurry, Co Sligo died on Friday after a workplace accident in the Blue Mountains, west of Sydney.
Mr Walsh was working on the NBN (National Broadband Network) in Station St, Katoomba, across the park from Blue Mountains City Council chambers, when he suffered a head injury around 1.30pm.
Police and paramedics were called but the man died at the scene.
NBN chief executive officer, Bill Morrow, said the man was a contractor working for one of its delivery partners on the network. Mr Morrow expressed his sadness at the news.
“This is tragic news and we are doing all that we can to assist.
“The thoughts of everyone at NBN are with the family, friends and colleagues of the deceased at this very sad time.”
Mr Walsh was a valued member of the Tourlestrane GAA in Sligo.
On its website, the club said it “would like to offer sincere condolences to his mother Elizabeth, brother John and all of the extended Walsh and Gilmartin families, neighbours and friends”.