Asterisk PBX Configuration & Integration

I'm looking for a freelancer with experience in Asterisk PBX systems to help me with the following key tasks:

- Setting up Voicemail to Email
- Configuring Call Forwarding
- Implementing IVR (Interactive Voice Response)
- Setting up Extensions
- Configuring Trunking

For your application, I'd appreciate if you could share any relevant past work you've done with Asterisk PBX systems.

Looking forward to your proposals.