Voice Engineer

Auxis LLC; Bogotá; On-site; COP 286,451,000 - 381,934,000; Full time

Job summary

Auxis LLC in Bogotá seeks a Voice Engineer to own day-to-day engineering support of the voice and unified communications environment for the Mosaic Infrastructure Managed Services engagement, spanning roughly 60 sites across the United States, Canada, Brazil, Peru, and Paraguay. The role stabilizes the legacy CUCM estate while migrating to cloud-based calling, handling MACDs and issue resolution.

You will work with the network team to plan migrations, troubleshoot voice quality, coordinate with

Qualifications

• Bachelor's degree or equivalent professional experience in IT/Telecommunications.
• 3+ years of hands-on voice/UC engineering experience incl. CUCM administration.
• Knowledge of SIP, RTP, QoS, voice gateways, and SIP trunking.
• Experience executing MACDs and troubleshooting voice quality in multi-site environments.
• Experience with telecom carriers on trunks, circuits, and number porting.
• Familiarity with ITIL incident and change management processes.
• Strong English communication skills (B2+).

Responsibilities

• Provide day-to-day operational support for CUCM, including call routing, dial plans, voicemail, and UC services.
• Execute voice MACDs for users, devices, and call flows.
• Troubleshoot voice quality, registration, and connectivity across sites.
• Support decommissioning of legacy CUCM estate and migration planning.
• Coordinate with carriers on circuit, trunk, and porting activities.
• Document the voice environment and configurations.
• Collaborate with Network Engineer Lead on voice-impacting changes.
• Assist Teams Phone/Direct Routing integration where in scope.
• Participate in after-hours change windows for voice changes and migrations.
• Track and report status of voice tickets and milestones.]

Skills

Voice/UC engineering

English proficiency (B2+)

Multilingual capability (Spanish/Port/

Education

Bachelor's degree in IT/Telecommunications or related field

Tools

CUCM

Unity Connection

SIP trunking

CUBE/ISR gateways

ServiceNow

Job description

Job Summary

The Voice Engineer owns day-to-day engineering support of the voice and unified communications environment for the Mosaic Infrastructure Managed Services engagement, spanning roughly 60 sites across the United States, Canada, Brazil, Peru, and Paraguay. The current environment includes a legacy Cisco Unified Communications Manager (CUCM) estate that is being progressively decommissioned as the client transitions to modern cloud-based calling. This role supports and stabilizes the existing voice platform, executes moves/adds/changes/deletes (MACDs), troubleshoots voice quality and connectivity issues, and plays a hands-on role in migration and decommission activities in coordination with the network team.

Responsibilities

• Provide day-to-day operational support for the Cisco CUCM environment, including call routing, dial plans, device registration, voicemail, and related UC services.
• Execute voice MACDs (moves, adds, changes, deletes) for users, devices, hunt groups, and call flows through the account's request and change processes.
• Troubleshoot voice quality, registration, and connectivity issues across sites, including SIP trunking, gateways, and QoS-related problems, escalating to carriers or the network team as needed.
• Support the phased decommission of the legacy CUCM estate, including site-by-site discovery, migration planning inputs, cutover execution, and post-cutover validation.
• Coordinate with carriers and telecom vendors on circuit, trunk, and number porting activities in support of migrations and incident resolution.
• Maintain accurate documentation of the voice environment, including dial plans, trunk inventories, gateway configurations, and site voice profiles.
• Partner with the Network Engineer Lead and network team on voice-impacting network changes (QoS, VLANs, firewall rules for voice traffic).
• Support Microsoft Teams calling/telephony integration activities where in scope of the client's target-state voice platform.
• Participate in scheduled after-hours change windows for voice changes and migration cutovers.
• Track and report status of voice-related tickets, projects, and decommission milestones to the Network Engineer Lead.

Skills and Experience

Required Qualifications

• Bachelor's degree in Information Technology, Telecommunications, or a related field, or equivalent professional experience.
• 3+ years of hands-on voice/UC engineering experience, including administration of Cisco Unified Communications Manager (CUCM).
• Working knowledge of voice protocols and technologies: SIP, RTP, QoS, voice gateways, and SIP trunking.
• Experience executing voice MACDs and troubleshooting voice quality issues in a multi-site environment.
• Experience working with telecom carriers on trunks, circuits, and number porting.
• Familiarity with ITIL incident and change management processes.
• Strong verbal and written communication skills in English B2+

Preferred Qualifications

• Experience supporting voice platform migrations or decommissions (CUCM to cloud calling, Teams Phone, or similar).
• Cisco Collaboration certification (CCNA/CCNP Collaboration) or equivalent.
• Experience with Microsoft Teams Phone / Direct Routing.
• Experience in a managed services environment supporting enterprise clients.
• Trilingual Spanish/English/Portuguese is a MUST, given the engagement's multi-country footprint.

Technical Skills & Tools

• Cisco Unified Communications Manager (CUCM), Unity Connection, and related UC tooling.
• SIP trunking, voice gateways (ISR/CUBE), and dial plan administration.
• Voice troubleshooting tools (packet capture, RTMT, or similar).
• Microsoft Teams Phone / Direct Routing is a plus.
• ITSM/ticketing platforms (ServiceNow or equivalent).

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