She is a senior artist at Iwantja Arts, in Indulkana in Aṉangu Pitjantjatjara Yankunytjatjara (APY Lands), South Australia, known for a series of works on large linen canvases called Ngangkari Ngura (Healing Country).
[3] She grew up at the Ernabella Mission in Pukatja in the aftermath of the British nuclear tests at Maralinga and Operation Totem at Emu Field in the late 1950s and early 1960s.
[2] Nici Cumpston, curator of Aboriginal and Torres Strait Islander Art and artistic director of the Tarnanthi exhibitions at the Art Gallery of South Australia (AGSA) in Adelaide, regards Muffler's "meteoric rise" as well-deserved, and included Muffler's work in the 2020 Open Hands exhibition, which was dedicated to the work of senior women artists in remote communities.
[4] She has also worked in hospitals in Adelaide, Coober Pedy, Whyalla and Alice Springs,[1][7] helping to heal the spirits of anangu.
[5] Muffler is a director for Iwantja Arts, and a cultural advisor to the APY Collective, which comprises ten Indigenous-owned artistic enterprises.