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 Recent World of Communications

- Architect, plan, and implement enterprise-level AD infrastructure.
- Perform domain/forest upgrades, consolidation, and restructuring.
- Design OU models, delegation structures, GPO architecture, and security baselines.
- Plan and implement multi-site deployment, replication topology, site links, and DC placement. Handle P1/P2 escalations, critical outages, and deep-dive troubleshooting. Troubleshoot:

- AD replication failures
- Kerberos/NTLM authentication issues
- Trust relationship issues
- SYSVOL/DFSR/FRS problems
- FSMO role failures
- DNS-integrated AD issues Perform advanced diagnostics with: dcdiag, repadmin, nltest, ktpass, klist, ldp, ADSI Edit, Event logs.
- Design and manage complex GPO environments.
- Perform GPO impact assessments and conflict resolution.
- Establish GPO standards, baselines (CIS, Microsoft Security Baselines), and enforcement
- Implement AD tiering models (Tier 0/1/2) and privileged access security.
- Manage privileged groups with PAM/PIM (e.g., Azure AD PIM).
- Enforce secure domain controller policies.
- Conduct frequent AD security posture reviews and audits.
- Work with SIEM/SOC teams on identity-related incidents. Support and integrate AD with enterprise apps:

- ADFS
- Azure AD / Entra ID
- Azure AD/Entra ID Connect (sync, filtering, staging mode)
- SSO/SAML/LDAP-based applications Troubleshoot synchronization, token issues, or authentication flows
- Manage domain controllers (on-prem & cloud-hosted).
- Support DNS, PKI (ADCS), and time-sync architecture.
- Plan and implement backup/restore, authoritative/non- authoritative restores, and tombstone recovery.
- 12–20 years of experience managing and troubleshooting Active Directory in an enterprise environment.




- Lead AD/Identity projects end-to-end.
- Create RCA documents for high-severity incidents.
- Review L2 escalations and improve SOPs.
- Mentor L1/L2 team members.
- Advanced Active Directory architecture, forest/DNS design. Strong understanding of:

- Sites &
- Services
- AD replication internals
- Authentication protocols (Kerberos, NTLM, LDAP, LDAPS)
- Token size, SID filtering, and trusts
- Strong troubleshooting experience in enterprise-scale AD.
- Extensive PowerShell expertise (modules, advanced scripting).
- Windows Server (2012–2022) advanced knowledge.

Strong experience in:

- GPMC
- ADSI Edit
- LDP
- Event log RCA
- DFSR/SYSVOL troubleshooting Experience with:
- Azure AD / Entra ID
- ADFS
- Hybrid Identity architecture
- Azure AD Connect sync troubleshooting
- Understanding of AD replication topology and tools like repadmin, dcdiag.
- Familiarity with Azure Active Directory, MFA, or AD Connect is a plus.

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 large global environments (50k+ users preferred).
- Experience with Red Forest / ESAE / 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.
- 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.

📌 Manager - Network Operations & Support (Pune)
🏢 Tata Communications
📍 Pune