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
Job Title: Active Directory Administrator – L3
Experience: 6–10+ Years
Location: (As applicable)
Department: Infrastructure / Identity & Access Management (IAM)
Role Summary
The Active Directory L3 Administrator is responsible for the
design, administration, troubleshooting, and optimization of Microsoft Active Directory and identity services across on‑premises and hybrid environments. This role provides
Level‑3 escalation support, drives
architecture improvements, and ensures
security, availability, and compliance of directory services.
Key Responsibilities
Active Directory & Identity Management
- Design, manage, and support Active Directory Domain Services (AD DS) in large enterprise environments
- Administer and troubleshoot:
- Forests, domains, trusts
- Sites & services
- DNS, DHCP integration
- Group Policies (GPO design, optimization, troubleshooting)
- Handle complex AD replication, authentication, and trust issues
- Lead AD upgrades, migrations, and domain consolidation projects
Hybrid Identity & Azure AD / Entra ID
- Manage Hybrid AD environments using:
- Azure AD Connect / Entra Connect
- Password Hash Sync (PHS), Pass‑Through Authentication (PTA)
- Troubleshoot hybrid identity issues:
- Sync errors
- Duplicate objects
- Attribute conflicts
- Support Azure AD / Entra ID features:
- Conditional Access
- MFA
- Identity Protection
- Privileged Identity Management (PIM)
Security & Compliance
- Implement and enforce AD security best practices
- Manage:
- Tiered admin model
- Privileged access
- Secure LDAP
- Hardening of DCs
- Investigate and remediate:
- AD security incidents
- Compromised accounts
- Kerberos / NTLM issues
- Support audit, compliance, and security reviews
Operations & L3 Support
- Act as L3 escalation point for AD, authentication, and access issues
- Perform root cause analysis (RCA) for P1/P2 incidents
- Coordinate with:
- Security teams
- Network teams
- Application teams
- Create and maintain:
- SOPs
- Runbooks
- Architecture documentation
Automation & Optimization
- Develop and maintain PowerShell automation for:
- User and group management
- AD health checks
- Reporting
- Improve operational efficiency and reduce manual effort
Technical Skills (Mandatory)
- Microsoft Active Directory (AD DS)
- Group Policy Management
- DNS / DHCP
- Azure AD / Microsoft Entra ID
- Azure AD Connect
- PowerShell scripting
- Windows Server (2016/2019/2022)
- AD security & hardening
Good to Have
- Experience with ADFS
- Identity Governance & Lifecycle Management
- PAM tools (BeyondTrust, CyberArk, etc.)
- Microsoft Defender for Identity
- Large‑scale enterprise environments (50k+ users)
Soft Skills
- Strong troubleshooting and analytical skills
- Ownership mindset and accountability
- Ability to handle high‑pressure incidents
- Clear communication with technical and non‑technical stakeholders
- Documentation and process orientation
Click on Apply to know more.