Tata Communications
Website:
tatacommunications.com
Job details:
About The Company
Tata Communications Redefines Connectivity with Innovation and IntelligenceDriving the next level of intelligence powered by Cloud, Mobility, Internet of Things, Collaboration, Security, Media services and Network services, we at Tata Communications are envisaging a New World of Communications
Designation/Title Active Directory (AD) Core Engineer/Administrator Sub-Band B3-2/B4-1 Education Qualifications B.E/B.Tech Experience 10+ Years of experience in relevant field Job Family IT Operations Purpose/Objective The Active Directory L3/L4 Core Engineer is responsible for the design, implementation, administration, and advanced troubleshooting of enterprise Active Directory infrastructure. This role acts as the highest escalation point for AD-related incidents, ensuring stability, security, and performance of identity services across the organization. Key/Major Activities Core AD Management Manage and support Active Directory Domain Services (AD DS) in multi-domain/multi-forest environments Perform forest/domain design, schema management, and trust relationships Handle Group Policy design, deployment, and troubleshooting L3/L4 Support & Troubleshooting Act as escalation point for complex AD issues (replication, authentication, DNS, Kerberos) Perform root cause analysis (RCA) and implement permanent fixes Troubleshoot: AD replication failures GPO inconsistencies Login/authentication issues Domain controller performance Infrastructure & Core Services Manage: Domain Controllers (physical/virtual/cloud) DNS (integrated with AD) DHCP integration (if applicable) Perform AD health checks and audits Security & Compliance Implement AD security best practices: Tiered administration model Privileged access management (PAM) Secure domain controllers Manage: Security groups Delegation models Access controls Directory Services Enhancements Support hybrid identity: Azure AD / Entra ID integration Azure AD Connect Implement: SSO (Single Sign-On) MFA integrations Automation & Optimization Develop automation using: PowerShell scripting Improve system reliability and reduce manual interventions Change & Incident Management Participate in: CAB meetings Change implementation Maintain documentation, SOPs, and runbooks Technical Skills Must-Have Skills Strong expertise in: Active Directory (AD DS) Group Policy DNS (Windows-based) Deep understanding of: AD replication Kerberos authentication LDAP Advanced Skills (L4 Expectation) AD Forest/Domain migrations Disaster recovery for AD (authoritative/non-authoritative restore) AD site topology design Security hardening (CIS benchmarks preferred) Good to Have Azure AD / Entra ID Azure AD Connect Identity Federation (ADFS) M365 Identity integration Certificates (AD CS) SCCM / Intune integration Tools & Technologies PowerShell scripting Active Directory Administrative Center AD Replication tools (repadmin, dcdiag) DNS Manager Monitoring tools Microsoft Certifications (one or more):
- SC-300 – Identity & Access Administrator
- AZ-305 / AZ-104
- AZ-800 & AZ-801
- MS-102 (Microsoft 365 Administrator)
- ITIL Certified Legacy but valuable: MCSE: Identity / Server Infrastructure
- Experience in largeenterprise-scale environments
- Experience with Red Forest / hardened identity models.
- Knowledge of PKI, certificates, and MFA systems.
- Automation and Scripting
- Monitoring and Reporting
- Maintain highly available AD infrastructure with minimal downtime.
- Ensure zero-impact forest/domain upgrades and migrations.
- Resolve P1/P2 tickets within SLA.
- Automate repetitive tasks—reduce manual interventions by 40–60%.
- Conduct monthly AD health and security reports.
- Implement secure baselines and eliminate high-risk findings. Optional Add-ons (Customize if needed)
- On-call / 24x7 support requirement
- Shift-based support
- Global infrastructure support Behavioural Skills High availability and performance of AD services Zero/Minimal unplanned downtime Timely resolution of L3/L4 incidents Secure and compliant AD infrastructure Ability to lead crisis troubleshooting and restore services quickly. Strong documentation, architecture diagramming, and SOP creation. Cross-team collaboration (Security, Network, Apps, Cloud). Mentorship for junior engineers. Ability to handle on-call rotation and critical outages. Strong analytical and problem-solving mindset.
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