Independent collaboration specialist
CUCM to Webex Calling and contact centre migrations to Webex Contact Center. CCIE Collaboration #59074 and CISSP. Remote delivery worldwide, UTC-3.
Services
Migration approach
Review CUCM, PSTN, dial plan, sites, trunks, call flows and dependencies. Identify what must move, what can stay and what needs redesign.
Define the Webex Calling target state, Local Gateway model, routing, number plan, coexistence and rollback requirements.
Prove registration, inbound and outbound calling, emergency routing, feature behaviour and operational support before wider rollout.
Execute phased migrations, resolve day-one issues and leave the implementation documented for the team that will run it.
Security assessment
Collaboration platforms are routinely left outside wider security programmes. That creates gaps across the SBC, edge, signalling, media and firewall policy.
The assessment treats those components as one system. The deliverable is a written findings report with prioritised remediation steps, focused on practical exposure and configuration risk.
Assessments can be scoped as a standalone engagement without a migration.
About
Geovani Gonçalves is a CCIE Collaboration #59074 and CISSP-certified engineer specialising in enterprise collaboration, networking and cybersecurity.
His background spans global migrations, Cisco collaboration and voice infrastructure, network security, and vulnerability and exposure management. He has led multi-site programmes, supported complex enterprise environments, and trained technical teams across global organisations.
Based in São Paulo, Brazil, he works remotely in English and Brazilian Portuguese.
Credentials
MITRE ATT&CK, Threat Modelling, Splunk Fundamentals, AWS Security Essentials, Azure Fundamentals (AZ-900), Python for Network Engineers, and Cisco Cybersecurity Pathway.
How I work
Engaged as an independent subcontractor by Cisco partners, or directly by enterprises. Fully remote delivery.
Based in Brazil on UTC-3, with overlap into European mornings and the full North American business day. Scheduled out-of-hours and weekend cutovers are available, charged at the standard day rate with no premium.
Comfortable working to a partner's own design, governance and change process. UK and Brazil invoicing available.
Experience
Projects have been delivered across finance, healthcare, hospitality, education, manufacturing and technology sectors.
Engagements include multi-site enterprise migrations and university cluster environments, working within existing delivery, security and change-control frameworks.
Contact
Send the project outline, current platform and target state. I can quickly confirm whether the engagement is a fit.
Currently taking on new engagements.