Antonios Fragkakis
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Seasoned IP and Voice Technologist | Unflappable Problem-Solver, Committed to Client Success.
With over 10 years of expertise in IP and Voice technologies, I specialize in the implementation, configuration, and troubleshooting of Cisco Unified Collaboration applications across various industries. Adept at managing multiple projects in fast-paced, dynamic environments while maintaining keen attention to detail, I bring a proactive, solution-oriented mindset and thrive under pressure. Dedicated to delivering exceptional client service with a strong focus on achieving measurable results.
Certifications
Experience
Associate Consultant
Member of Global Service Assurance team supporting the Verizon account.
- Global VoIP support
- SIP Trunking Enterprise & SIP Trunking Carrier Grade
Senior Engineer Consultant
Member of Global Service Assurance team.
- Troubleshooting complex customer issues for Cisco UC applications / VoIP.
- Identify, analyse and drive cases as part of Problem Management.
- Support and guide customers how to setup and use the provided services.
- Liaising with suppliers to escalate technical issues and following up to conclusion.
- Build and maintain service and customer specific documentation and provide internal trainings.
Senior Voice System Engineer
Member of voice service delivery team for IBM EMEA account.
- Responsible for complex new site deployments and migrations to VoIP technology: Cisco based solutions.
- Troubleshooting issues within IBM environment for existing deployments, incidents and problems.
- Design IP Telephony solutions.
- Leading IP Telephony migrations for business units with up to 3000 users.
- Migration of Cisco UC collaboration applications from non-virtual to virtualized servers.
- Providing technical support to other teams.
- Mentoring junior team members.
Network Engineer
Pre-sales and infrastructure engineering role.
- Responding to RFPs, RFIs and RFQs as part of the pre-sales process.
- Preparing proposal documents including proposals, pricing sheets and solution presentations.
- Working closely alongside other technology owners for optimal solution design.
- Working with OEM partners to ensure appropriate solutions are proposed during the pre-sales cycle.
- Participating in due diligence meetings with customers to gather requirements.
- Supporting corporate data and voice network infrastructure (100-employee company).
- Developing, implementing and supporting data and VoIP solutions.
- Technical project management.
Network Engineer
Supporting IP data & voice network infrastructure
Network Engineer
Supporting data network infrastructure in Athens 2004 Olympics & Paralympics Games.
Education
Technological Educational Institute (TEI) of Athens - Faculty of Technological Applications
6.2/10 (Good)
Skills
- Cisco Unified Communications Manager
- Cisco Voice Gateway / CUBE
- Webex Calling
- Audiocodes SBC
- Ribbon SBC
- SIP Trunking
- Enterprise SIP Trunking
- Carrier-Grade SIP Trunking
- VoIP
- PSTN Integration
- IP Networking
- DNS
- Firewalls
- Load Balancing
- QoS
- Kubernetes
- Docker
- GitOps
- DevOps
- Cloud-Native Infrastructure
- Linux
- Git
- Bash
- CI/CD Pipelines
- Greek — Native
- English — Fluent
- German — Basic