<p>If I don't know who the specific contact person is, how should I address my cover letter? "To whom it concerns" and "Dear Sir/Madam" seem a bit stiff. My school's career center suggests using "Dear Human Resources Manager", but it seems presumptuous to assume that all companies have an HR manager.</p>
<p>Try to find out the name of the internship coordinator person and address it to the person. You can call the place of the internship or see if you can see it online. In general, I wrote "To Ms. Jones." If you cannot get a hold of the person, I have no idea what to do because I never ran into that problem. I tried to make each coverletter psuedo-personal to the company</p>