About the Role We are looking for a highly skilled Senior NOC Technician with a strong background in transport networks to join our Network Operations Center (NOC) team. In this critical role, you'll ensure the integrity, performance, and stability of cutting-edge SDH, DWDM, and photonic mesh networks across a large-scale telecom infrastructure. You will be part of a high-performing team providing Tier 1 technical support, incident resolution, and network quality assurance, primarily for operations defined by Telefónica. If you thrive in fast-paced, high-responsibility environments and have deep knowledge of optical transport systems, we want to hear from you. Key Responsibilities Perform Level 1 incident management: diagnose, troubleshoot, and resolve complex issues in SDH and DWDM transport networks. Support circuit activation and monitoring across various technologies and customer services (E1, STM, GE, 100/400GE, etc.). Manage customer complaints and provide technical support to on-site field teams. Conduct network quality analysis, identify performance issues, and propose corrective measures. Coordinate shift activities, ensuring smooth handovers and 24/7 service continuity. Escalate issues to vendors and internal teams using GRI, Telefónica mail, and other tools. Your Expertise 7–10 years of hands-on experience as a NOC Technician specializing in transport network technologies. Strong working knowledge of SDH, DWDM, and advanced optical/photonic mesh networks. Familiarity with Huawei and Nokia equipment and network management systems. Proven experience supporting large telecom operators, with deep understanding of Telefónica's support and operation protocols. Technical proficiency in OTN, GMPLS, optical protections (1+1, MSP, SNCP), and high-capacity customer circuits. Ability to analyze and resolve complex incidents efficiently under pressure. Tools & Technologies Incident management platforms: GRI, GEISER, MAR/Genesys Network Management Systems: Huawei U2000, Nokia NFM/T Reporting & Analysis: Excel, PowerPoint, Word, Power BI Communication & Vendor Coordination Tools: GRI, internal email systems Languages Spanish – fluent (mandatory) English – intermediate or higher (preferred, not required) What We Offer A dynamic, fast-paced work environment supporting critical network infrastructure. Career growth opportunities in a global telecom environment. Competitive salary and shift-based benefits. The chance to work with leading technologies and top-tier vendors.