Is there a way to have blog posts automatically remove after 30-days?

I am looking for an automatic way to have "limited time" blog posts. Basically after 30-days, I want the blog post to no longer be visible and to automatically unpublish it's self. 

This would be used on a news site for employment opportunities. For example: the job listing [blog post] would automatically come off the list [blog] after 30-days. 

Thanks for any advise. 

This question has been asked before but as of now I am not aware of anyway to schedule an unpublish date,  just a publish date.