ISP CRM Development with Zabbix Integration

I need a comprehensive ISP CRM platform to manage various operational aspects. The system should cater to Admins, Technicians, and Sales Representatives with defined roles and permissions.

Key Functionalities:
- Tracking leads and approvals
- Monitoring electricity usage per site
- Generating and managing tickets
- Monitoring offline devices per site/region (integration with Zabbix and other SNMP tools)

Ideal Skills and Experience:
- Strong background in CRM development
- Experience with Zabbix and SNMP tools
- Familiarity with user role management and permission settings
- Ability to integrate multiple monitoring tools
- Prior experience in handling similar ISP or utility management systems