Sharrock had previously claimed his first Castlecliff Golf Club senior men's title in November last year with a six handicap.
In total there were six divisions where titles were decided yesterday and local Castlecliff players featured in four of them.
For the women's competition, which was strokeplay decided on gross, no one was in cooee of Stratford's Ann Braithwaite, who despite not playing her best at the back end of the tournament was still 15-20 shots clear at the close of play.
Sharrock joins four other Whanganui-based golfers to have won this senior national title.
The others are FC Hutchison (Wanganui) in 1958, Bryan Silk (Wanganui) in 1971, Gordon Sutherland (Wanganui) in 1991, and Morrie Gibbons (Castlecliff) in 2001.