Voice/VoIP & Microsoft Teams Voice Expert

About the role

We are seeking a Voice/VoIP & Microsoft Teams Voice Expert to join our IT Foundation Services department. You will help operate, stabilize and evolve our global communication infrastructure, focusing on cloud‑based telephony technologies within Microsoft Teams.

Key responsibilities

• Operate, maintain and continuously enhance the global Microsoft Teams Voice infrastructure, including Call Queues, Auto Attendants, Direct Routing and Operator Connect.
• Ensure high‑quality end‑user experience with emphasis on usability, performance and stability.
• Manage SIP trunking and coordinate with telecom carriers across EMEA, AMER and APAC regions.
• Support implementation and operation of voice security controls, QoS measures and compliance requirements.
• Automate administrative tasks through PowerShell scripting.
• Troubleshoot and resolve complex telephony issues on Apple endpoints and mobile devices as 3rd‑level support.
• Collaborate closely with workplace services, security teams and end users to align voice solutions with operational needs.
• Evaluate and implement new technologies, features and best practices within the Microsoft Teams Voice ecosystem.
• Document configurations, processes and platform standards to ensure transparency and scalability.

Required profile

• Academic degree in Information Technology or a comparable qualification.
• Several years of professional experience with Microsoft Teams Voice architecture and telephony systems.
• Comprehensive knowledge of SIP, VoIP protocols and SBC configurations.
• Proficiency in voice networking troubleshooting and monitoring tools.
• Familiarity with Microsoft 365, Azure AD and Active Directory.
• Experience with PowerShell scripting.
• Strong communication and collaboration skills.
• Fluency in English and willingness to travel occasionally.

Required skills

• Microsoft Teams Voice architecture
• Operator Connect, Direct Routing, Cloud PBX
• SIP and VoIP protocols
• Session Border Controller (SBC) configuration
• Voice networking troubleshooting
• Monitoring tools for telephony
• Microsoft 365 and Azure Active Directory
• PowerShell scripting

What we offer

• Personal and professional development programs including mentoring, leadership courses and internal seminars.
• Attractive compensation package with vacation and holiday bonuses, pension benefits, a 40‑hour week and 25 vacation days.
• Comprehensive onboarding experience, including a virtual online platform before the start date.