Database Manager to Install and Use in Wordpress

Hello, We are http://www.awardrealty.com. We have 168 real estate agents working for us and we hire and fire new agents once a week. We need a database managger sytem that would easily allow us to add and delete new agents. We also need to be able to add a bio for each agent that would link from [login to view URL] to>a page dedicated to each agents personal bio. This could also work as a hove over where a bio would pop up. We hope to hear from you soon! -Rachael