Following her divorce, in 1952 Lyn's mother married Dominic (Don) Syme, a fellow member of the Communist Party of Australia (CPA) and the owner of a poultry farm in Moorebank, southwest of Sydney.
[7] After the CPA adopted a policy of support for Women’s Liberation and for other protest groups in 1972, Lyn and her sister Wendy were among a group of young left-wing feminist activists who joined the NSW chapter of the Builders Labourers Federation (NSWBLF),[8] becoming trailblazers in the fight to gain acceptance for women working on construction sites in Australia.
[16] She and six other feminists subsequently submitted confidential "whistleblower" testimony to the Royal Commission on Human Relationships meeting in Canberra[17] and published and distributed a pamphlet detailing the adverse conditions for women seeking pregnancy terminations at the PSI clinics.
Lyn and her life partner, Wiradjuri elder Kevin Williams, have been cited in innumerable reports on the impact of Australian and multinational mining operations[23][24] in the area corresponding to historical Dabee and Wiradjuri ancestral lands, as well as issues centered on native title and land rights in relation to traveling stock routes[25] through the Central Tablelands of NSW.
[28] The Aunty Lyn Syme Memorial and Dabee Art Exhibition opened the Aboriginal Cultural Centre in Kandos on Thursday 21st November, 2019.