Hybrid Asterisk PBX Setup

I’m rolling out a new Asterisk-based PBX that spans both an on-prem rack server and a small cloud instance. I need a specialist who can take the project from a clean slate to a fully functional, production-ready system... (Budget: $250 - $750 USD, Jobs: Alerting, Asterisk PBX, Debian, Linux, Network Administration, SIP, Telecommunications Engineering, VoIP)