IT Support Engineer – 3CX / VoIP

About the role

We are seeking a hands‑on IT Support Engineer specialized in 3CX and VoIP to manage and support our business‑critical communication infrastructure. The role combines system administration, VoIP engineering, and security responsibilities while working closely with both business and technical teams.

Key responsibilities

• Manage enterprise VoIP infrastructure design, implementation, stabilisation and ongoing support.
• Provide L1 and L2 support for VoIP and communication systems.
• Lead 3CX/VoIP projects from requirements analysis through production rollout and operational support.
• Deploy, configure and optimise 3CX in virtualised environments.
• Design and maintain high‑availability and backup strategies.
• Harden VoIP infrastructure against security threats and remediate vulnerabilities.
• Troubleshoot SIP trunks, extensions, call routing, and call‑quality issues.
• Support API integrations and workflow automation on the 3CX platform.
• Administer Microsoft Office 365 environments.
• Manage Windows Server, Active Directory, user accounts and endpoint support.
• Support voice, networking and wireless infrastructure.
• Perform system administration, hardware/software troubleshooting and enterprise IT operations.
• Follow ITSM processes and use ticketing systems for incident management.

Required profile

• Strong hands‑on experience with 3CX, VoIP and SIP technologies.
• Proven ability to deliver L1/L2 technical support in an enterprise setting.
• Experience with virtualised environments, high‑availability and backup solutions.
• Security‑first mindset with capability to identify and remediate vulnerabilities.
• Good understanding of networking, wireless and voice infrastructure.
• Effective collaboration with business and technical teams.

Required skills

• 3CX platform
• VoIP and SIP protocols
• Microsoft Office 365
• Windows Server
• Active Directory
• Virtualisation (e.g., VMware, Hyper‑V)
• High‑availability and backup solutions
• API integration and workflow automation
• Networking fundamentals
• Wireless infrastructure
• IT Service Management (ITSM) tools
• Ticketing systems
• Security hardening for VoIP