Escalations for an individual contact

Hello, I hope this is an easy questions. What I’m trying to do is I have an Icinga monitoring system setup that sends notices to 3 people. Want we want to do is have it setup so that 2 of the 3 people receive all notifications but the 3rd person (Tier 2) only receives notifications from the 3rd notification and on, or receive notifications after 1 hour.

Any suggestions or advice would be greatly appreciated.