Sync users with locale database


Every user of my organisation are in my local database. Sometimes there are some new people that I add to my database or some people leave the organisation and then I delete those people form the database.

I also have a drupal website running. And i am wondering if there is a way that the user list of my drupal site can sync with my local database. So when I add a new member, this member also have an account on the drupal website.

Can anyone help me?