Job Title: Senior VoIP / Unified Communications Engineer

Location: New York, NY

Duration: 1 Month

We are seeking a seasoned Senior VoIP / Unified Communications Engineer to provide remote, ad-hoc professional services in support of a mixed Cisco CUCM and Webex Calling environment. This role is intended to augment and partner with our internal senior VoIP engineer and help execute planned initiatives and ongoing support activities, as overall internal resources are limited.

Key Responsibilities

The consultant will provide senior-level expertise and hands-on support, including but not limited to:

Installation, configuration, and upgrade support for Cisco Unified Communications systems

Advanced troubleshooting and root-cause analysis of VoIP and UC issues

Design review, validation, and documentation of voice architectures

Collaboration with internal engineering staff on audits, migrations, and upgrades

Providing best-practice recommendations aligned with Cisco standards

Upgrade Cisco CUCM from version 12.5 to 14 (CUCM 15 is not an option due to third-party application incompatibilities)

Update Cisco systems to comply with new TLS authentication requirements

Upgrade and validate the Informacast Paging system

Conduct a RedSky (E911) audit in collaboration with the internal senior engineer

Conduct a Cisco CUBE routing audit in collaboration with the internal senior engineer

Assist with the migration of the red phone environment to Cisco

Required Skills & Experience

10+ years of experience in VoIP / Unified Communications engineering

Deep hands-on expertise with:

Cisco CUCM

Webex Calling

Cisco CUBE

RedSky (E911)

Informacast Paging

Strong understanding of SIP, TLS, certificates, and voice security

Proven experience supporting enterprise-scale voice environments

Ability to work independently and collaboratively in a remote consulting model

Preferred Qualifications

Cisco Collaboration certifications (CCNP/CCIE Collaboration or equivalent experience)

Prior experience performing system audits, upgrades, and migrations

Strong documentation and knowledge-transfer skills