Dr. MacLeod held a Canadian Research Chair in Bilingual Acquisition and Communication Disorders and has received major grants as a principal investigator from organizations such as CIHR, SSHRC and the US National Science Foundation to study speech and language development in bilingual children. She is also an active co-investigator on several pan-Canadian grants. Dr. MacLeod’s research has focused on the speech and language abilities of bilingual children and adults. She has developed an expertise the study of speech and language development among bilingual children from Official Language Minority Communities in Canada and among children from minoritized language communities, including immigrant and refugee children. Her work with bilingual children led her to co-found a non-profit organization to support bilingual language development in young refugee children. This work has led to continued community-based research within a social-justice framework to understand how to best support language maintenance and transmission.