Eddwan Hallen

A technology consultancy delivering the two things that usually come from different vendors: the custom software the business runs on, and the engineering behind the critical communications underneath it.

How we work:

Software delivery — from discovery to production. Architecture, implementation, and operation of business platforms, internal portals, dashboards, and integration layers. Stack: Ne

EDCA Treinamentos is a technology training company focused on the practical development of telecommunications, networking, and VoIP professionals. Founded through the partnership between Eddwan Hallen and Caio Hernandes — who together bring over 25 years of work in mission-critical environments across service providers, system integrators, and enterprises — EDCA turns real field experience into tr

Technical leader on the BroadWorks delivery and consulting team, supporting Tier-1 service providers across the United States and Europe. End-to-end ownership of multi-million-dollar transformation programs spanning hosted voice, unified communications, and carrier-grade collaboration — from architecture through deployment and steady-state operations.

Scope: Cisco BroadWorks (Application Server,

Consulting engineer on the BroadWorks delivery team, designing and deploying carrier-grade voice and collaboration solutions for Tier-1 service providers across the United States and Europe. Hands-on technical ownership across the full delivery lifecycle — discovery, design, implementation, integration, migration, and post-deployment stabilization.

Scope: Cisco BroadWorks (Application Server, Net

Technical support engineer specialized in Cisco Unified Communications Manager (CUCM) for enterprise and service provider customers worldwide. Owned complex troubleshooting, root-cause analysis, and resolution of mission-critical voice incidents across CUCM clusters, gateways, SIP trunks, and endpoints. Acted as senior escalation point on high-severity cases, working directly with engineering on p

Solution-level support engineer for Cisco Hosted Collaboration Solution (HCS), supporting Tier-1 service providers delivering multi-tenant collaboration to thousands of enterprise customers. End-to-end ownership of complex incidents spanning the entire HCS stack — call control, voicemail, presence, contact center, session border, and the management/orchestration layer. Cross-product root-cause ana

First-line and advanced technical support for Cisco Collaboration deployments across Latin America. Handled mission-critical voice, video, and unified messaging incidents for enterprise customers, owning cases end-to-end from triage to resolution. Trilingual customer interface (Portuguese, English, Spanish) across multi-country, multi-vendor environments.

Stack: CUCM, Unity Connection, Webex Meet

Network support analyst at MRS Logística, one of Brazil's largest railway operators. Owned operation, monitoring, troubleshooting, and continuous improvement of the corporate networking, voice, and security infrastructure supporting mission-critical logistics operations across multiple sites in southeastern Brazil — serving thousands of users and 24/7 operational systems.

Stack: Cisco routers and

Worked as Fundador at Sol Informática Ltda.

Foco em técnicas avançadas de gerenciamento de projetos e liderança de equipes multidisciplinares para alcançar objetivos organizacionais.

Esta graduação é altamente focada no design de redes e na implementação de hardware e software, abrangendo créditos específicos em linguagens de programação e arquiteturas de computadores.

MBA in Project Management with focus on advanced project management techniques and leadership of multidisciplinary teams.