Looking up a value and returning a list

I've been browsing through the forums for an answer to this question but it doesn't seem like there is a clear one.

What I'm trying to do is lookup a value and return list of corresponding data. For example, in column A, I have a "Branch Location" and in column B, I have a person associated to that "Branch Location". There is more than one person per branch.

I'd like to create a summary sheet (probably using some type of INDEX/MATCH/SMALL array) that will list all of the employees for that branch. I've attached a dummy Excel for your reference.

Please help. Thanks!