Knowledgemanagementsystems are making inroads into organizationsthat wantto get a handleontheir intellectual capital. Tothis end, we have designed and implemented Expert Seeker, an Expertise-Locator knowledge managementsystemthat will be usedin several NASACenters to identify experts within the organization.Thispaperpresentsthe use of web data miningtechniquesto constructandmaintain an employee'sprofile.