Senior Voice Infrastructure Engineer & Team Lead at R&R Telecom, Inc. (2004-03 – 2025-05-31)
Carrier-grade VoIP service provider operating mission-critical Ribbon/Sonus soft-switch infrastructure supporting high-volume enterprise and carrier voice traffic across globally distributed operations. Serve as senior technical authority, L3 escalation point, and team lead for all voice infrastructure engineering, platform operations, and incident management. Lead end-to-end configuration, optimization, troubleshooting, and administration of Ribbon/Sonus GSX 9000 and SBC7000 platforms alongside full supporting ecosystem including PSX policy servers, SGX, EMS, and NFS systems.
Coordinate on-call rotations and after-hours incident response for 24/7 mission-critical voice environment. Act as primary technical liaison and strategic partner with Ribbon/Sonus for advanced troubleshooting, platform upgrades, and feature enhancements. Collaborate cross-functionally with network, security, and engineering teams to deliver end-to-end voice solutions aligned with enterprise security and cloud best practices.
- Led and mentored engineering teams in Ribbon/Sonus platform operations, SIP troubleshooting methodologies, and operational procedures — building technical depth, operational consistency, and team capability across all voice infrastructure functions
- Served as L3 escalation authority for complex voice incidents, leading root cause analysis and rapid service restoration using Wireshark, tshark, tcpdump, and Sonus GSX call trace and log analysis to isolate and resolve signaling and media layer issues across SIP, SS7, H.323, ISDN, and CAS environments
- Managed on-call operations and incident coordination in 24/7 mission-critical voice environment, ensuring rapid response, clear communication, and minimal service disruption across all voice platform incidents
- Partnered directly with Ribbon/Sonus for advanced platform troubleshooting, feature development, upgrades, and infrastructure enhancements — pushing platform capabilities beyond standard configurations to unlock new service offerings and revenue streams
- Engineered and maintained SBC and carrier integrations on Ribbon/Sonus SBC7000 and GSX 9000, managing SIP trunk configurations, policy server rules, dial plans, and call routing across complex multi-carrier environments
- Reduced voice operational costs by 30% through systematic redesign and scripting-based automation of VoIP provisioning workflows, reducing manual effort, minimizing configuration errors, and improving platform reliability
- Drove 100% increase in provisioning and voice traffic revenue by engineering innovative new features that expanded Sonus switch-partitioning capabilities, directly enabling new managed services offerings and enterprise revenue streams
- Implemented secure voice architecture leveraging IPSec, OpenVPN, and Wireguard for encrypted voice connectivity, with Cisco ACL and iptables-based access controls to prevent unauthorized carrier access, mitigate toll fraud risk, and enforce SIP security policies
- Developed scripting-based automation using Perl, Bash, and Tcl to automate repetitive voice operational tasks, standardize configuration management, and implement proactive performance monitoring across Ribbon/Sonus infrastructure
- Engineered high availability and disaster recovery strategies for carrier-grade voice infrastructure, maintaining platform resilience and ensuring continuity of voice services across failure scenarios and planned maintenance windows
- Proactively identified and resolved capacity and performance issues through ongoing analysis of voice traffic patterns and platform metrics, preventing service-impacting events before they reached customers or end users
- Identified critical gap in CDR collection processes, documented requirements, and successfully drove leadership approval for corrective development — demonstrating ability to translate operational observations into strategic infrastructure improvements
- Created and maintained comprehensive technical documentation library including system administration procedures, Sonus API specifications for Java application development, SBC configuration guides, and process flows — standardizing team practices and ensuring operational continuity
System Engineer — Networking & ISP Operations at Computer Stars, Ltd. (1997-11 – 2004-02)
Regional ISP holding approximately 50% market share, providing managed network and telecommunications services to state institutions, Romanian enterprises, and multinational companies across two counties. Led all Networking Department technical operations including design, deployment, and management of enterprise data networks. Managed team of 5 technical staff.
Provided direct customer technical support and served as primary technical liaison for managed services clients and national partner programs.
- Managed and led a team of 5 technical engineers, providing day-to-day leadership, task coordination, performance oversight, and technical guidance across all networking and customer support operations
- Designed and deployed enterprise network solutions for key clients across IP/IPX/NetBIOS environments using active/passive networking equipment and remote access technologies, enhancing company reputation and competitive position
- Implemented network performance monitoring and management for ISP infrastructure, proactively identifying capacity and performance issues to ensure uninterrupted service delivery
- Engineered advanced security solutions for Internet services customers, improving both performance and security posture through innovative data communications technologies
- Led national partner program initiative — among the first in the country — securing company involvement in national technical support network with personal responsibility for IT and networking support across two counties
- Delivered Microsoft networking training to IT professionals under Ministry of Education and Culture program, earning formal recognition for the company and demonstrating strong ability to translate complex technical concepts to varied audiences
- Engineered billing and tracking system for dial-up clients that significantly improved accuracy, reduced manual processing time, and improved overall departmental performance and customer satisfaction
