Tcom - Network Support Senior Specialist

NTT DATA, Inc.; Bengaluru; On-site; INR 3,000,000 - 4,000,000; Full time

Job summary

NTT DATA Services in Bangalore, Karnataka, India, is seeking a Tcom - Network Support Senior Specialist to join our team. The role focuses on advanced UC administration, integration with SBCs and PSTN, and leadership in Cisco CUCM deployments.

You will drive architecture decisions, security hardening, and upgrade planning. The ideal candidate brings deep CUCM and Unity Connection expertise, strong dial-plan design skills, and experience with CUBE and SIP/trunking in hybrid cloud/on-prem

Qualifications

• Deep hands-on experience with CUCM design, deployment, and cluster management.
• Expertise administering Unity Connection and E911.
• Proven dial plan design experience with E.164 and SIP.
• SIP trunk management and SRST site-survivability know-how.
• Hands-on with CUBE and voice gateways (TDM/PRI/SIP).
• Knowledge of VoIP protocols (SIP, RTP, SRTP, MGCP, H.323).
• UC security best practices including SRTP/TLS and hardening.

Responsibilities

• Advanced UC Administration & Operations: route calls, optimize numbering plans, configure features, own incidents escalated from L2, deliver RCA.
• Integrations with SBCs, gateways, PSTN, and contact centers; ensure hybrid UC compatibility.
• Design and implement Cisco UC solutions; produce architecture docs for deployments.
• Security & Compliance: enforce UC security measures and E911 configuration.
• Plan upgrades and migrations for CUCM and related infrastructure.
• Governance: define UC best practices and create SOPs for L1/L2 teams.
• Vendor Coordination: liaise with Cisco TAC and carriers for escalations.

Skills

CUCM design/deploy

CUC Unity Connection

E911 configuration

Dial plan design

SIP trunk management

SRST site-survivability

CUBE/Voice gateway

VoIP protocols

UC security best practices

UC health monitoring

Automation (Python/PowerShell)

UCCE familiarity

UC integrations

Education

BE/B.Tech or MCA or equivalent

Cisco CCNP Collaboration

Cisco CCIE Collaboration (preferred)

ITIL v4 Foundation (advantage)

Job description

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Tcom - Network Support Senior Specialist

Date: Aug 6, 2026

Company: NTT DATA Services

NTT DATA strives to hire exceptional, innovative and passionate individuals who want to grow with us. If you want to be part of an inclusive, adaptable, and forward-thinking organization.

We are currently seeking a Tcom - Network Support Senior Specialist to join our team in Bangalore, Karnātaka (IN-KA), India (IN).

Key Responsibilities

• Advanced UC Administration & Operations: Perform advanced call routing, numbering-plan optimization, and feature configuration (hunt groups, call queuing, call forwarding, call admission control); own complex incidents and problems escalated from L2, delivering RCA and permanent fixes; ensure compliance with UC redundancy, failover, and disaster-recovery strategies.
• Integration & Interoperability: Support integrations with SBCs, gateways (CUBE), PSTN providers, and contact center solutions (UCCE); ensure compatibility across hybrid UC environments (on-premises plus cloud UC such as Webex or Teams voice, where applicable).
• Architecture & Design Leadership: Design and implement Cisco UC solutions, including CUCM clusters, SRST sites, SIP trunking strategies, and dial plan configurations; produce HLD/LLD documentation for UC deployments and migrations.
• Security & Compliance: Enforce UC security measures and participate in E911 configuration and regulatory compliance audits.
• Upgrades & Migrations: Plan and execute version upgrades, product migrations (CUCM 12.x+), and infrastructure refresh projects.
• Governance & Documentation: Define UC best practices, SOPs, and knowledge-transfer documentation for L1/L2 teams.
• Vendor Coordination: Act as the primary liaison with Cisco TAC and carrier vendors for L3 escalations, service-request creation, and post-incident reviews.

Required Skills & Experience

• Deep hands‑on experience with Cisco Unified Communications Manager (CUCM), including design, deployment, and cluster management.
• Expertise administering Cisco Unity Connection (voicemail) and Cisco Emergency Responder (E911).
• Proven expertise in dial plan design (E.164 numbering, global route patterns, SIP normalization).
• Strong experience with SIP trunk management and SRST site‑survivability configuration.
• Hands‑on experience with CUBE (Cisco Unified Border Element) and voice gateway deployments (TDM, PRI, SIP).
• Strong knowledge of VoIP protocols: SIP, RTP, SRTP, MGCP, and H.323.
• Expertise in UC security best practices, including SRTP/TLS configuration and UC hardening.

Nice-to-Have Skills

• Experience automating UC provisioning (Python, PowerShell, Ansible) or using orchestration tools.
• Familiarity with UCCE (contact center) integrations.
• Knowledge of UC health‑monitoring tools (Prime Collaboration, DNA Center, or equivalent).

Education & Certifications

• BE/B.Tech, MCA, or equivalent degree in IT or Telecommunications.
• Cisco CCNP Collaboration required (or actively held) at this level; Cisco CCIE Collaboration (or written exam cleared) preferred; ITIL v4 Foundation an advantage.

About NTT DATA

NTT DATA is a $30 billion business and technology services leader, serving 75% of the Fortune Global 100. We are committed to accelerating client success and positively impacting society through responsible innovation. We are one of the world's leading AI and digital infrastructure providers, with unmatched capabilities in enterprise-scale AI, cloud, security, connectivity, data centers and application services. our consulting and Industry solutions help organizations and society move confidently and sustainably into the digital future. As a Global Top Employer, we have experts in more than 50 countries. We also offer clients access to a robust ecosystem of innovation centers as well as established and start-up partners.NTT DATA is a part of NTT Group, which invests over $3 billion each year in R&D.

Whenever possible, we hire locally to NTT DATA offices or client sites. This ensures we can provide timely and effective support tailored to each client’s needs. While many positions offer remote or hybrid work options, these arrangements are subject to change based on client requirements. For employees near an NTT DATA office or client site, in-office attendance may be required for meetings or events, depending on business needs. At NTT DATA, we are committed to staying flexible and meeting the evolving needs of both our clients and employees. NTT DATA recruiters will never ask for payment or banking information and will only use @nttdata.com, @nttdatafed.com and @talent.nttdataservices.com email addresses. If you are requested to provide payment or disclose banking information, please submit a contact us form, https://us.nttdata.com/en/contact-us .

NTT DATA endeavors to make https://us.nttdata.com accessible to any and all users. If you would like to contact us regarding the accessibility of our website or need assistance completing the application process, please contact us at https://us.nttdata.com/en/contact-us . This contact information is for accommodation requests only and cannot be used to inquire about the status of applications. NTT DATA is an equal opportunity employer. Qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability or protected veteran status. For our EEO Policy Statement, please click here . If you'd like more information on your EEO rights under the law, please click here . For Pay Transparency information, please click here .

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