You can explain who a person's boss is using the phrae "__ reports to __".

If your boss is named "Jay", then you can say:

I report to Jay.

The reverse of this is to "have people reporting to" someone:

She has six people reporting to her now.

This phrase is commonly used in professional jobs and office jobs. It sounds very respectable.

Another expression for this is "works under ___":

Do you still work under Dharmesh?

In other situations (like at smaller businesses or service jobs), you can say that a person "works for" someone:

I work for Marcus.

And that person is the other person's "boss" or "manager":

Marcus is my direct manager, and his boss is the owner.