Senior Lead System Engineer (AD, DC, DNS, DHCP)
Bengaluru, India | Onsite | Full-time | 10–15 Years Experience
About The Role
We are a leading global financial institution looking for a seasoned Active Directory Subject Matter Expert to join our enterprise infrastructure team in Bengaluru. This is a senior technical role that demands deep expertise across directory services, identity management, and core Windows infrastructure — combined with the leadership presence to guide and mentor a high-performing team.
Infrastructure Management
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Manage and maintain Active Directory infrastructure including domain controllers, forests, trusts, and replication
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Administer and troubleshoot DNS and DHCP services to ensure high availability and consistent performance
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Design, implement, and manage Group Policies (GPOs) to enforce security and operational standards across the environment
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Deploy and manage Public Key Infrastructure (PKI) and Microsoft Certificate Services throughout the certificate lifecycle
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Administer and support Distributed File System (DFS) for data replication and access management
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Manage Microsoft Key Management Services (KMS) to ensure licensing compliance
Operations & Engineering-
Perform root cause analysis and advanced troubleshooting for complex infrastructure-related issues
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Automate administrative tasks and operational workflows using PowerShell scripting
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Monitor system performance, availability, and capacity to ensure proactive infrastructure health
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Ensure adherence to security best practices and regulatory compliance standards
Collaboration & Transformation-
Collaborate with cross-functional teams on migrations, upgrades, and enterprise transformation initiatives
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Support planned change activities to minimise risk and operational disruption
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Contribute to documentation, SOPs, and knowledge base maintenance
Leadership & Mentorship-
Act as the technical lead and go-to SME for the team on all Active Directory, Domain Controller and identity-related matters
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Provide guidance and mentorship to junior and senior engineers
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Engage with stakeholders at all levels with clarity, confidence, and ownership
Technical Skills Required-
Active Directory (ADDS) — Architecture, design, upgrade, and migration
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DNS & DHCP — Configuration, troubleshooting, and optimisation
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Group Policy (GPO) — Design, implementation, and troubleshooting
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PKI & Certificate Services — Deployment and full lifecycle management
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DFS — Namespaces and replication
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Microsoft KMS — Setup and ongoing maintenance
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PowerShell — Advanced scripting and automation
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Windows Server — 2016 / 2019 / 2022 /2025 administration
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Knowledge on SCCM, MECM, INTUNE will plus
Good to Have
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Experience with Azure AD and Hybrid Identity environments
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Knowledge of Active Directory security hardening and auditing tools
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Exposure to ITIL processes — Incident, Change, and Problem Management
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Hands-on experience in migration, consolidation, or infrastructure transformation projects
Certifications (Preferred)-
Microsoft Certified: Identity and Access Administrator Associate
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Microsoft Certified: Windows Server Hybrid Administrator Associate
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MCSE or equivalent
What You Bring-
10–15 years of progressive experience in enterprise Active Directory and Windows infrastructure environments
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Strong problem-solving and analytical capabilities with a structured approach to troubleshooting
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Excellent communication and stakeholder management skills
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Ability to lead with authority and collaborate with humility in a fast-paced enterprise setting
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A disciplined, security-conscious mindset with a commitment to operational excellence
