CareerPlan

​IT-Systemadministrator (m/w/d) – VoIP und Telefonie​

Verl, NORDRHEIN_WESTFALENFull-time2026-11-04 → 2026-11-11

Core

Operate and administer VoIP and telephony systems, ensuring quality and availability of communication services while developing the telephony infrastructure.

Role type

System Administrator (VoIP and Telephony)

Builds

IP-based telephony infrastructure and unified communications solutions

Domain

Automation technology / Telecommunications

Required skills

VoIP and SIP system administration, IP telephony configuration, user and permission management, SIP trunk and provider connection management, voice quality monitoring and troubleshooting, network prioritization and VLAN configuration, firewall and secure access configuration, migration of legacy to IP-based telephony

Preferred skills

None stated

Technologies

VoIP, SIP, IP telephony, Unified Communications, SIP trunks

Responsibilities

Configure call numbers, permissions, and reachability functions; monitor and resolve disturbances in communication services; collaborate with network and security teams on network prioritization and secure access; implement new telephony solutions and support migration to IP-based telephony

Seniority

Mid-level, hands-on IC