For 44 years he had charge of the Baptist Church at Stanmore, New South Wales, a highly successful ministry.
[4][5] He emulated his father's attachment to the Bathurst Baptist church and, following Pastor James Worboys, became a convinced teetotaler: a member of the Band of Hope and W.C.T.U., outdoing the women in his abhorrence of alcohol.
Christian Endeavour Union in 1905, and in the same year was elected president of the first instance of the Council of Churches in New South Wales.
Despite a radical change in the town's demography, the Stanmore Baptist church remained enthusiastic missionaries, attributable to Tinsley's leadership and evangelistic ability.
David Alfred Tinsley was born at Blackheath in 1934, studied chemical engineering at the University of New South Wales, then in 1966 entered NSW Baptist Theological College, and served at Narrabeen church.