While looking at the site, choose 'Add a page' from the top navigation.

Choose the 'CONTACT PAGE' option and click next.

Choose the location of the page, give the page a title, description and keywords. 

You can then enter some introductory text in the content editor.

You can then specify multiple email addresses and roles.
These roles will be offered in a drop down box on the contact form, so that users can choose which address to send their contact to. 
(only the role is displayed to the user)