Mezue ahịrịokwu na-esonụ: Johnston meriri nrite ọlaedo abụọ na National Women's Under-22 Team na Air Canada Cup. Rebecca mere nke mbụ ya na 2008 IIHF World Women's Championship, na-egwu egwuregwu ise niile dịka Canada meriri ọlaọcha. Rebecca Johnston bụ onye otu ndị otu Canada n'okpuru afọ 22. U-22 sonyere na MLP Cup, nke emere na Ravensburg, Germany site na Jenụwarị 2<unk>6, 2009. Johnston so n'òtù meriri ọlaọcha. Na asọmpi ahụ, Johnston chịkọtara isi asaa (3 ihe mgbaru ọsọ, 4 enyere aka). Egwuregwu ya kachasị mma bụ na mmeri 11-0 na Russia. Johnston gbara ọkpụ atọ ma nyekwa aka. Na mgbakwunye na MLP Cup, Johnston so ndị otu ndị okenye Canada n'asọmpi Four Nations Cup n'etiti Nov. 4<unk>9, 2009. Johnston so n'òtù meriri ọlaọcha. N'egwuregwu nrite ọlaedo nke iko mba anọ nke 2010, Rebecca Johnston nyere goolu nke abụọ nke egwuregwu ahụ mere ka Canada nweta nrite ọlaedo. E kwuru na goolu ahụ bịara na egwuregwu ike na 6:21 n'ime oge mgbatị. Ihe mgbaru ọsọ ahụ nyere Canada mmeri 3-2 na United States. Ọ bụ asọmpi Hockey Canada nke iri na abụọ n'akụkọ ihe mere eme afọ iri na ise nke asọmpi ahụ. Ọ ga-eduga ndị Canada niile na-agba bọọlụ n'asọmpi ahụ na goolu anọ. Na egwuregwu megide Russia na
2012 IIHF Women's World Championship, Johnston debara aha egwuregwu ise (otu ihe mgbaru ọsọ, anọ enyere aka) na mmeri 14<unk>1. N'ọnwa Disemba afọ 2013, a họpụtara Johnston ka ọ bụrụ onye ga-anọchite anya Canada n'egwuregwu Olimpik nke afọ 2014.