Himalayas Candidate
candidate@example.com
Remote
Dear Hiring Manager,
I am excited to apply for the Cisco Voice Engineer position at América Móvil. As a voice and collaboration engineer based in Mexico with a strong background designing, deploying, and supporting Cisco Unified Communications solutions, I am enthusiastic about contributing to your efforts to deliver reliable, scalable communications across Latin America. América Móvil’s mission to connect people and businesses resonates with my commitment to building resilient voice platforms that improve user experience and lower operational cost.
Over the past six years I have led voice initiatives for large carriers and enterprise customers (including implementations for clients working with Telcel and regional enterprise accounts), focusing on Cisco CUCM, Unity Connection, UCCX, Cisco Expressway, Cisco SBCs, and SIP trunking. In my most recent role I architected and deployed a CUCM cluster serving 2,500 users with multi-site dial-plan and geo-redundancy, reducing inter-site call failures by 30% and improving average MOS from 3.6 to 4.1. I also led a SIP migration from legacy PSTN circuits to SIP trunks with CUBE that lowered monthly voice transport costs by 20% while preserving E911 and billing integrity. My daily skill set includes SIP troubleshooting, QoS design and verification, call-flow optimization, automation with Python and Ansible for configuration management, and integration with collaboration endpoints such as Cisco Jabber, IP Phones, and Webex Calling.
I am particularly drawn to this opportunity at América Móvil because of your scale and focus on accessible, high-quality communications across diverse geographies. I enjoy solving the operational and architectural challenges that arise when scaling Cisco voice platforms across mobile and fixed networks, and I am motivated by roles where I can both lead implementation projects and mentor local NOC/operations teams. My experience integrating Cisco voice environments with Microsoft Teams Direct Routing and hybrid cloud Webex solutions would help accelerate any strategic initiatives to modernize contact centers, enable remote work, and improve service continuity for your subscribers.
I would welcome the chance to discuss how my technical experience and project leadership can support América Móvil’s voice and collaboration objectives. Thank you for considering my application; I look forward to the opportunity to speak with you about how I can help strengthen and scale your voice services across the region.
Sincerely,
Mariana López
