Having completed that two-year contract, he has returned home with his family.
Mark Elliott, the BikeNZ high-performance director, said the timing proved ideal.
"Our vision had always been to have Dayle focus on a position as head coach to ensure we have the best possible knowledge transfer across all of our programmes, and focus on the collective growth of all of our squads.
"Both Rio and Tokyo Olympics will demand a higher level of strategic planning to ensure we make the most of qualification and performance delivery on the day.
"This has been our vision since the London Olympics, but we needed to get the right people into the right roles to make it effective, and to have the funding in place."
Carswell will take up his position in mid-October.