"I am lucky I am still able to do a bit of training at work and a lot by climbing up Parihaka when I am in Whangārei. It's all for a good cause. Leukaemia and blood cancer affects people of all ages, from babies to adults," he said.
The 51-year-old climbed the Sky Tower stairs as a 9/11 memorial before deciding to join the challenge.
He, Geraghty and other volunteer firefighters raised $875 during a sausage sizzle outside the Maungaturoto Four Square on August 5.
He said it was double what they raised during last year's sausage sizzle and thanked the community for supporting such a worthy cause.
Every day, seven children and adults in New Zealand are diagnosed with a blood cancer like leukaemia, lymphoma and myeloma.
In the 18 years, the Sky Tower event has been running, firefighters from around the country have raised more than $10 million to support patients and their families living with blood cancers and related blood conditions.
The Leukaemia & Blood Cancer NZ had raised $752,453 by mid-afternoon yesterday.