vtiger vicidial

I need help with a vtiger vicidial integration project to increase automated sales and lead management capabilities. I’m looking for a specialist who can integrate vtiger with vicidial and have experience in both fields. I need the integration to facilitate call center integration for my business. I don't have preference regarding a specific version of vtiger or vicidial and am open to suggestions. I'm not sure if I need any custom features or modifications, so would appreciate the opinion of the freelancer who can help with this project.