A tax assessor is a local government official who works with appraisers to determine the property value in a specific city or town. The value of the property gets converted into an assessment used to calculate property tax bills. Assessments may need to be changed periodically based on fluctuating property values. Daily responsibilities of tax assessors include working with appraisers to value properties, traveling from one property to another, networking with county officials, analyzing data, and processing assessments.