Charles relinquished command of No 9 Squadron in December 2007 and since then has held area and national positions with NZ Cadet Forces. Currently he holds the position of S9 — Civic Liaison attached to NZCF Headquarters. He is also the Area Support Officer (ASO), assisting the three Whanganui Units — No 9 Squadron, TS Calliope and the Wanganui Cadet Corps, and the Ruapehu / Rangitikei Cadet Corps based in Waiouru.
In his time he staffed JNCO, commissioning and the cadets bushcraft course at Dip Flat. He was a student on the first winter officers bushcraft course in 1985 and staffed the second in July 1988. In January 2018 he ran the officers and cadets fieldcraft course at Waiouru which included writing the syllabus for both of the eight-day courses.
Locally he co-ordinates the Whanganui-Manawatu Sports Day, Battle of Britain Commemoration Service in Whanganui and the cleaning of the True War Graves in the two Whanganui Cemeteries. Nationally he is trying to raise the profile of staff of the individual units and as they complete NZCF courses. To do this he provides newspapers with officer's profile and purpose and outcomes of the course.
Squadron Leader Quirk is a senior adviser in the Ministry of Education working with schools, board of trustees, students and their families, and other agencies across Taranaki, Wanganui, Rangitikei, Ruapehu and Manawatu area.