The primary role of this position is to serve as the Telephony Engineer on the Infrastructure Engineering team.
Lead the design, standardization, implementation, and management of global voice/telephony infrastructure.Liaison with operations team on voice service operations: monitoring/events, incidents, problems, and escalations.Define full lifecycle service management (roadmap, transition, operation, continuous improvement) for all voice/telephony hardware.Implement, coordinate and support telephony changes.Isolate, diagnose and resolve voice/telephony problems individually and through coordination with others.Maintain system access and security in order to safeguard company data.Work with various telephony providers on service deliveries, billing, maintenance, support and configuration changes for legacy PBX infrastructure, POTS lines, PRI lines, etc.Plan and perform Teams telephony migrations from legacy telephony setupProject contributor to other IT projects where and voice communication changes may be neededAssist with design of disaster recovery and business continuity plans
Demonstrated experience, including but not limited to: PBX telephone systemsCisco Unified Communications Manager and Voice over IP systemsTeams telephonyTeams based contact center solutionsTeams admin centerCisco call center solutionsCisco FinesseNetwork protocols and standards, including TCP/IP, DHCP, DNS, and VLANsFundamentals of TCP/IP routing and WAN designs Industry certifications such as CCNP Collaboration, or equivalentIndustry certifications such as Microsoft 365 Certified: Collaboration Communications Systems Engineer Associate, or equivalentStrong analytical and troubleshooting skills with the ability to diagnose and resolve complex telephony issuesExperience coordinating and working with teams of multiple disciplines globallyProven success of collaborating with non-IT stakeholdersPractical experience in IT infrastructure design, implementation and supportAbility to document precisely and at right level of detailAbility to define and follow processesAbility to translate business requirements into IT solutions and associated costUnderstanding of financial impact of decisionsAbility to clearly define problem statements and determine solutionsMust have strong planning skillsExcellent communication and interpersonal skills with the ability to collaborate effectively with cross-functional teamsRequired Years of Experience:~ 5 years of designing, deploying, and supporting voice/telephony systems and networksRequired Education:University or similar degree

Celanese is a global leader in chemistry, producing specialty material solutions used across most major industries and consumer applications. Our businesses use our chemistry, technology and commercial expertise to create value for our customers, employees and shareholders. We are committed to sustainability by responsibly managing the materials we create for their entire lifecycle and are growing our portfolio of sustainable products to meet increasing customer and societal demand. We strive to make a positive impact in our communities and to foster inclusivity across our teams. Celanese is a Fortune 500 company that employs more than 11,000 employees worldwide with 2024 net sales of $10.3 billion.
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