Carmelo Arnoldin’s first exhibit took place at Mercer Union in 1984. He has since shown his work at Garnet Press Gallery, The Ottawa Art Gallery. Christian Chassay Gallery in Montreal, Art Gallery of Mississauga, The Koffler Gallery, The Hamilton Art Gallery. Mount Allison University Gallery, Mocca, Kunsthalle Erfourt Germany, Fax Mouvenment in France, The Art Gallery of Tangshan in China and other galleries in Canada and the United States and Italy.
He has done a commission for Teknion Furniture Systems LTD. in Kuala Lumpur, Malaysia and the concept drawings for the Living Sculpture Research Centre for the Université du Québec a Trois-Riviére, Québec. He has also been a finalist in a number of public art commissions; one for the Centre Hospitalier Du St.-Eustache, St. Eustache, Québec, and one for the United Nations (Food and Agriculture Organization) and the city of Québec.
Since 1987 Carmelo Arnoldin has been a painting, sculpture and historical techniques professor in the Art and Art History, a collaborative B.A. Program between Sheridan Institute of Technology and Advanced Learning and the University fo Toronto at Mississauga.