Mark Elliott has resigned from his role as Triathlon New Zealand high performance director.
After previously working in the role from 2000 to 2004, Elliott returned to the job last year.
An independent review is currently underway into the Tri NZ high performance programme.
Elliott told said he had always intended that his second term would be a short-term involvement.
""It has been a time of significant change with new race formats bringing exciting elements to the sport, along with new opportunities. I wish Triathlon New Zealand, the athletes and dedicated coaches all the best going forward," Elliott said.