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.
Astle was a long-serving educator and sports coach, serving as a Deputy Rector at Palmerston North Boys' High School for 24 years before moving on to lead the national development team for New Zealand Cricket in Christchurch for over 10 years.