There are wide varieties of career in after the MSW. If you have been completed the MSW and looking for the professional career in this field, I will suggest you to join NGO for gaining the knowledge and experience about the social work.
In the NGO, I will suggest you to concentrate on the community mobilization as this activity will enhance your communication skills and you will be able to know about how to do the professional social work.
After MSW, you can also try in the government department as the social welfare officer and community mobilizer.