Joanne Callahan is a women's history advocate who has visited several women's suffrage sitesthroughout the country. She lives in Dallas and led the project to place a suffrage marker at Millermore Mansion in Old City Park. She has volunteered for the National Votes for Women's Trail for eight years and was involved in projects to place suffrage markers in El Paso and Austin. She recently retired from a four-decade career in information technology.