Tierney is a Parent-Infant guide while also lending her expertise to other program levels serving as a classroom support assistant. 

Tierney earned her undergraduate degree from Xavier University in Social Science in 1998. Tierney received her AMI Primary diploma from the Washington Montessori Institute and her Master’s in Education from Loyola University in Maryland in 2002. She earned an AMI Assistants to Infancy diploma in 2004 and has been with Hershey Montessori School since 2002. 

In her time away from school, Tierney enjoys teaching group fitness classes and spending time with her husband, Josh, and their daughters.