Kammala jumla mai zuwa: Costello ya taimaka wajen kafa shirin kwarewa ga 'yan wasan hockey na' yan wasan hockey na 'yan mata na Kanada, kuma ya kula da kafa kungiyar' yan wasan hockey na mata na Canada, da kuma budewa
1990 IIHF Mata na Duniya. Baya ga aikinsa a kan wasan hockey na ƙasar Kanada, ya shafe shekaru 15 a matsayin zartarwa a gasar Hockey ta Yamma, kuma wasu shekaru 14 a matsayin memba na majalisar Iceungiyar Ice Hockey ta Duniya. An shigar da Costello a cikin Hall of Fame na Hockey, da IIHF Hall of Fame, da Canada's Sports Hall of Fame, kuma shi ne Jami'in Dokar Kanada, kuma mai karɓar Dokar Hockey a Kanada.