[1] His work, mixed-media sculptures and installations, explores the themes of history, treaties, colonialism, and life both in urban spaces and nature.
In 1975-76 he continued his studies at Manitou College in La Macaza, Quebec with Mexican Aboriginal artist Domingo Cisneros.
[6] In 2002 the Mendel Art Gallery, Saskatoon organized the travelling exhibition, Qu'Appelle: Tales of Two Valleys, a large-scale survey of recent work.
[2] Several of Poitras's early installations, including Day Break Sentinel (1983), Big Iron Sky (1984), and Internal Recall (1986–88), incorporated suspended figures.
"[8] Poitras has used a variety of materials in his art, including stone, weathered prairie bone, traditional beadwork and historical photos, sometimes alongside transistor boards, electrical wires, audio tapes and plastics.