[4][5] She is a critic of the current child welfare system in Canada, especially as it relates to Indigenous peoples.
[7] Sinclair is also a founding editorial member of IndigenousVoices in Social Work (UHawaii), and a regional editor for AlterNative: An International Journal of Indigenous Peoples.
She went on to study at First Nations University in the bachelor of Indian social work program.
Sinclair is a full professor at the Faculty of Social Work at the University of Regina.
She has published on the "Sixties scoop," with her work being cited by publications such as The Canadian Encyclopedia,[10] and has appeared on programs such as CBC's "The National.