Senior Engineer, Infrastructure Engineering

Celanese · Hyderabad

  • Experience5+ yrs
  • SalaryNot disclosed
  • Work modeunknown
  • Levelmid
  • Posted20 Sept 2026

About Celanese

Celanese is hiring in Hyderabad in manufacturing industrial. This role looks for around 5+ years of experience.

The role

A mid-level Senior Engineer, Infrastructure Engineering role at a chemical manufacturing company; serves as a Telephony Engineer leading global voice/telephony infrastructure design, implementation, support, and lifecycle service management. Requires experience with PBX telephone systems, Cisco Unified Communications Manager, Voice over IP, Teams telephony, Teams based contact center solutions, Teams admin center, Cisco call center solutions, Cisco Finesse, and network protocols/standards including TCP/IP, DHCP, DNS, and VLANs, plus CCNP Collaboration or Microsoft 365 Certified: Collaboration Communications Systems Engineer Associate. Location is Hyderabad, Telangana, India with work mode not specified.

Full job description

Job Overview 综述

The primary role of this position is to serve as the Telephony Engineer on the Infrastructure Engineering team.

Responsibilities 职责

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 setup

Project contributor to other IT projects where and voice communication changes may be needed

Assist with design of disaster recovery and business continuity plans

Qualifications 要求

Demonstrated experience, including but not limited to:

PBX telephone systems

Cisco Unified Communications Manager and Voice over IP systems

Teams telephony

Teams based contact center solutions

Teams admin center

Cisco call center solutions

Cisco Finesse

Network protocols and standards, including TCP/IP, DHCP, DNS, and VLANs

Fundamentals of TCP/IP routing and WAN designs

Industry certifications such as CCNP Collaboration, or equivalent

Industry certifications such as Microsoft 365 Certified: Collaboration Communications Systems Engineer Associate, or equivalent

Strong analytical and troubleshooting skills with the ability to diagnose and resolve complex telephony issues

Experience coordinating and working with teams of multiple disciplines globally

Proven success of collaborating with non-IT stakeholders

Practical experience in IT infrastructure design, implementation and support

Ability to document precisely and at right level of detail

Ability to define and follow processes

Ability to translate business requirements into IT solutions and associated cost

Understanding of financial impact of decisions

Ability to clearly define problem statements and determine solutions

Must have strong planning skills

Excellent communication and interpersonal skills with the ability to collaborate effectively with cross-functional teams

Required Years Of Experience

~ 5 years of designing, deploying, and supporting voice/telephony systems and networks

Required Education

University or similar degree