Sheila Zimmer holds a Bachelor of Arts degree from the College of Notre Dame, with a concentration in Elementary Education and graduate degrees in Early Education and Reading. Her experience includes teaching, consulting, evaluation, and administration in the Baltimore area.

Julie Zimmer, a graduate of Salisbury University, joined the program in late 1990 and taught the first kindergarten class which began in 1992. It gained immediate approval from the Maryland State Department of Education, office on non-public certification. At the request of the families, a first grade was added in 1994. A house on the property was adapted for additional classroom space and a wing was added to the existing building in order to accommodate the long waiting list. When the wing opened in early 1995, the house was converted to an Infant/Toddler Center.

The 1995 addition was filled quickly, the waiting list remained, and parents were requesting additional grades. Another building, housing eight classrooms, a library, administration offices, a multi-purpose room, kitchen, and restrooms was opened in 1998 and the name was changed to Wicomico Day School. The new name more accurately reflected the broader spectrum of services and increase of classes through grade 5. At the suggestion of the faculty, the Core Knowledge curriculum was investigated and, following careful research, was adapted beginning with the 1998-1999 school year.