Lynette (Lyn) Grace Walker was born in 1927. She went to school at Clarendon Presbyterian Ladies’ College in Ballarat before going on to complete her teacher training at the University of Melbourne. Walker was commissioned to the Order of Deaconess at Trinity Presbyterian Church in Camberwell on 9 March, 1958, having trained at Rolland House Deaconess and Missionary Training College. In 1958, Walker travelled to the New Hebrides (now Vanuatu) to take up the post of educational missionary for the west coast of Malekula, based in South West Bay. Between 1958-1965, Walker taught in the South West Bay District School and developed a new syllabus.

Returning to Australia in 1966, Walker lived in Mornington, Victoria where she cared for her parents and served as Deaconess at the Frankston Presbyterian Church. In 1971, Walker returned to the New Hebrides to serve as Deaconess for Central Islands (Efate and adjacent islands). Based in Vila, she worked with women, young people and Sunday school teachers. Between 1975-1977, she took on the post of Deaconess for Southern Islands (Tanna, Aniwa, Aneityum, Futuna and Erromango). Walker returned to live in Melbourne in April, 1977. From 1978, she worked for the Uniting Church in aged care community outreach until her retirement in 1987. In retirement, she continues to be active in church life and community activities.

Since returning to Australia, Walker has visited Vanuatu several times, including in 1998 to join in the Golden Jubilee celebrations for the Presbyterian Church of Vanuatu.