Sienna Senior Living Inc., through its subsidiaries, provides senior living and long-term care (LTC) services in Canada. It operates through Retirement and LTC segments. The company offers a range of seniors' living options, including independent supportive and assisted living, memory care, and long-term care services, as well as specialized services comprising dementia care, continence management, skin and wound care, palliation, and end of life care; and provides management services.