Who We Are
NTT DATA is a leading global provider of infrastructure and platform services, partnering with some of the world’s most innovative technology vendors. We help organizations modernize their IT landscapes, increase operational efficiency, and enable sustainable business growth through reliable and scalable platforms. We’re looking for passionate, curious, and motivated individuals to join our team and work with clients to translate complex technology into real business value—driving transformation, resilience, and long-term success.
What You'll Be Doing

• Design, implement, and maintain enterprise unified communications solutions based on Cisco CUCM (Cisco Unified Communications Manager).
• Integrate and manage Audiocodes Session Border Controllers (SBCs) including Mediant series devices and OVOC (One Voice Operations Center) for monitoring and management.
• Support and maintain the VoIP backbone infrastructure, ensuring reliable connectivity between on-premises telephony systems, SIP trunks, and PSTN services.
• Provision, configure, and troubleshoot managed IP phones and ATA devices, ensuring seamless voice service for end users.
• Monitor system health and performance across the voice environment, proactively identifying issues and performing root cause analysis to resolve incidents.
• Troubleshoot complex voice, SIP signaling, telephony routing, and connectivity issues across enterprise communication systems.
• Collaborate with internal infrastructure teams, collaboration teams, and external vendors to support deployments, upgrades, and service improvements.
• Ensure systems meet security, compliance, and operational standards, maintaining accurate technical documentation and operational procedures.
• Support system upgrades, configuration changes, and lifecycle management for voice and collaboration platforms.
• Provide technical guidance and mentoring to junior engineers within the unified communications team.
• Participate in on-call rotations and out-of-hours support for live streaming events and critical service incidents.
  

What You'll Bring Along

• Bachelor’s degree in Information Technology, Telecommunications, Computer Science, or a related field, or equivalent professional experience.
• Minimum 3-5 years of experience in unified communications or voice engineering within enterprise environments.
• Strong hands-on expertise with Cisco CUCM administration, configuration, and troubleshooting.
• Experience working with Audiocodes SBCs (Mediant series) and OVOC management platform.
• Solid understanding of VoIP backbone architecture, SIP trunking, call routing, and PSTN integration.
• Hands-on experience provisioning and managing enterprise IP phones and ATA devices.
• Strong troubleshooting skills related to voice services, SIP signaling, telephony infrastructure, and call quality issues.
• Experience supporting enterprise-scale voice deployments and operational environments.
• Familiarity with automation or scripting (PowerShell desirable) for operational tasks and system administration.
• Excellent communication and collaboration skills, with the ability to work across technical teams and vendors.
• Cisco CCNP Collaboration certification is preferred.
• Audiocodes Certified Professional certification is desirable.
• Excellent command of both spoken and written English and German.
  

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