Jacoposie was born at Illutalik camp. At the age of 10, he contracted tuberculosis and had to be sent to Hamilton, Ontario for treatment. Around the same time, he lost his mother and two siblings. In 1967, he and the remaining members of his family moved to Pangnirtung. Roughly 10 years later, Jacoposie joined the Pangnirtung print shop as a printmaker. In addition to printing other peoples' works, he has done many drawings for the print shop and the Pangnirtung Tapestry Studio. He acknowledges the influence of his uncle and mentor, artist Lypa Pitsiulak on his work.

Jacoposie is best known for his graceful, lyrical rendering of birds. His drawings are based on actual birds, unlike the magical and supernatural birds of other Pangnirtung artists. Although rooted in realism, his birds are highly stylized, with an emphasis on the elegant shape of their wings. 

Exhibitions

• Arctic Images: Major Sculptures by Canada's Leading Contemporary Eskimo (Inuit) Artists, at D/Erlien Fine Art Limited presented by Orca Aart, Chicago
• Artists and Weavers IV, Arctic Artistry
• Baffin Images, Orca Aart
• Echoes of the Drum, Gallery of the Arctic
• Eskimo Sculpture, Eskimo Prints and Paintings of Norval Morrisseau, Art Association of Newport
• Inuit Art at Rideau Hall, Presented by Indian Affairs and Northern Development
• Inuk, Inuit: Art et tradition chez les esquimaux d'hier et d'aujourd'hui, presented by L'Iglou Art Esquimau, Douai, at Musee des Beaux-arts d'Arras
• Kanuitpit? Kunst und Kulturen der Eskimo: Eine Auswahl aus den Museumssammlungen, Staatliches Museum fur Volkerkunde Munchen
• Pangnirtung - Recent Sculpture, Inuit Gallery of Vancouver
• Pangnirtung Print Collection *79, (annual collection)
• Pangnirtung Print Collection *86, (annual collection)
• Pangnirtung Print Collection *92, (annual collection)
• Pangnirtung Print Collection *93, (annual collection)
• Pangnirtung Print Collection *94, (annual collection)
• Pangnirtung Print Collection *95, (annual collection)
• Pangnirtung Print Collection (printmaker) *77, (annual collection)
• Pangnirtung Print Collection (printmaker) *78, (annual collection)
• Pangnirtung Print Collection (printmaker) *79, (annual collection)
• Pangnirtung Print Collection (printmaker) *80, (annual collection)
• Pangnirtung Print Collection (printmaker) *83, (annual collection)
• Pangnirtung Print Collection (printmaker) *84, (annual collection)
• Pangnirtung Print Collection (printmaker) *85, (annual collection)
• Pangnirtung Print Collection (printmaker) *86, (annual collection)
• Pangnirtung Print Collection (printmaker) *87, (annual collection)
• Pangnirtung Print Collection (printmaker) *94, (annual collection)
• Pangnirtung Print Collection (printmaker) *95, (annual collection)
• Pangnirtung Print Retrospective: 1973-1986, Organized by Pangnirtung Eskimo Co-operative Limited, Pangnirtung, at Inuit Gallery of Vancouver
• Pangnirtung Whalebone Sculpture, The Snow Goose
• Pangnirtung Woven Tapestries, The Upstairs Gallery
• Tapestries by Contemporary Eskimo Weavers, Canadian Consulate presented by Arctic Artistry
• Tapestries from Eskimo Weavers, Arctic Artistry
• The Great Northern Arts Festival, held in Inuvik
• The Inuit Imagination, Winnipeg Art Gallery
• The Inuit Print and Sculpture 1960-1980, Westdale Gallery
• Tundra & Ice: Stone Images of Animals and Man, presented by Orca Aart at the Adventurers' Club
• Useful Bits of Bone, Winnipeg Art Gallery
• [L'art inuit], Presented by l'Iglou Art Esquimau, Douai at Les Martres-de-Veyre

Collections

• Canadian Museum of Civilization, Hull
• Dennos Museum Center, Northwestern Michigan College, Traverse City
• Inuit Cultural Institute, Rankin Inlet
• National Gallery of Canada, Ottawa
• Prince of Wales Northern Heritage Centre, Yellowknife
• Winnipeg Art Gallery, Winnipeg