IT Systems Administrator (VoIP & Telephony)

Quick Facts

• Role: IT Systems Administrator (VoIP & Telephony)

Description

You will operate and administer telephony systems, including IP phone systems, VoIP/SIP services, cloud telephony, and unified communications. You’ll provision and configure extensions, users and permissions, call routing features (e.g., IVR, queues, voicemail), and monitor voice quality and availability while troubleshooting issues. You’ll also collaborate with network and security teams to ensure secure VoIP connectivity and support migration from classic to IP-based telephony.

Responsibilities

• Operate and administer telephone systems, including IP telephone systems, VoIP and SIP systems, cloud telephony, and unified communications

• Provide and configure extensions and phone numbers

• Manage users, permissions, groups, and delegation rules

• Configure call forwarding, queues, hunt groups, IVR voice menus, voicemail, and time schedules

• Connect and monitor SIP trunks, provider connections, and site interconnections

• Monitor voice quality (latency, jitter, packet loss) and outages; analyze and resolve incidents

• Coordinate closely with network and security teams on network prioritization, VLANs, firewalls, and secure access

• Introduce new telephony solutions and accompany the migration from traditional to IP-based telephony

Requirements

• Completed vocational training as an Electronics Technician (m/w/d), IT Specialist for System Integration (m/w/d), or comparable qualification

• Relevant professional experience in the telephony domain

• Knowledge of operating and administering telephony systems and voice communication solutions

• Experience configuring phone numbers, permissions, and availability functions

• Knowledge of VoIP environment technical requirements, especially network prioritization, VLANs, firewalls, and secure access

• Independent, structured, and reliable working style with enthusiasm for new technologies

• Strong solution- and quality-orientation and analytical thinking in dynamic, complex environments

• Very good German (at least C2) and good English (at least B1), written and spoken

Benefits

• Secure position and attractive compensation

• 30 days of vacation

• Contributions to company pension plans

• Employer savings benefits

• Vacation and Christmas bonuses

• Flexible working hours with flextime and options to compensate for overtime

• Possibility of mobile work on individual days after successful onboarding and probation