Stuart McMillan will face down all his fears and take a death-defying plunge off Kawarau Bridge, courtesy of AJ Hackett Bungy, when he revisits his beloved New Zealand in early November.
The soon-to-be flying Scotsman said he felt it was time to face his greatest terror at the age of 46.
He said he remembered peering over the edge of the Kawarau Bridge and feeling physically sick and weak at the knees when he toured New Zealand for the second time in 2000.
"However, on this occasion I fully intend to conquer my fear of heights," Mr McMillan said.
"I simply cannot afford to let down my work colleagues, friends, family and neighbours, who have given so generously, and I have never been more determined about something as I am about going head-first into the Kawarau River."
Mr McMillan said every cent raised in his sponsorship would be donated to the Accord Hospice in his hometown of Paisley.
He has already beaten his original target of 1000 to reach 1235 ($3223) and his new goal is to raise at least 1500 ($3913).
"My mother died of cancer 19 years ago and I saw at first hand the difference that can be made to a terminally ill patient's quality of life when they are looked after by highly-trained nurses and doctors," he said.
"The Accord Hospice does fantastic work that receives no government support.
They rely solely on fundraising and donations to keep running their remarkable facility.
"When I decided that I wanted to raise funds for a good cause, the Accord Hospice came to mind immediately."
Mr McMillan has served as a prison officer at HMP Barlinnie, in Glasgow, for more than 17 years.
He was given the sponsorship of governors and colleagues past and present, and granted permission to canvass support from the hundreds of inmates through the prison's magazine.
Mr McMillan said he will arrive in the country on November 1 and bungy jump the following day.
He said he hoped his fundraising feat would strike a chord with Otago Daily Times readers, "some of whom I know may well have Scottish blood in them".
"I would like to appeal to the people of Otago to aid this Scotsman on his flying visit to the South Island and if they could find it in their hearts to give a few dollars to an extremely worthy cause."
You can contact Mr McMillan at shmcmillan@ntlworld.com