Set up coffee meetings with people at the company you want to work at, get to know them a bit. (inc.com)
However, there are several people at our company who have private businesses in the specific field they are working in. (law.stackexchange.com)
To customize your cover letter further, look for a contact person at the company, ideally the hiring manager or HR contact, and address the letter to this person. (thebalance.com)