Astle was a long-serving and influential staff member, cricket coach and Deputy Rector of Palmerston North Boys' High School, where he taught for 24 years. After that, he served as national development manager for New Zealand Cricket in Christchurch for more than 10 years.
A prominent figure at Palmerston North Boys' High School, Astle was a cricket coach and Deputy Rector who spent 24 years teaching there. He then held a similar role at New Zealand Cricket in Christchurch for over a decade.