Secondary phone number/call forwarding suggestions

[D'vorah Nadel]

Hi 

We are wanting to set up a call forwarding service/secondary number. 

We want to use it as our maintenance number that we give to tenants and gets forwarded to our phones or a property managers phone when we are out of town. 

Does anyone have any suggestions or experience in this?

Ideally I would like one that will ring to my business partners phone first and then if she doesn't answer, rings to mine (if that is even possible). 

Thank you.