RAMAKRISHNAN ADHIYAMAN
IAM SPECIALIST
Hoofddorp,NH
Summary
Adept at leading complex IT projects, I spearheaded the migration to Cloud Authentication at Tata Consultancy Services, significantly enhancing security. My expertise in PowerShell scripting and identity management, coupled with a knack for mentoring teams, underscores my ability to deliver impactful solutions and foster technical growth.
Overview
13
13
years of professional experience
2
2
Certifications
Work History
Associate Consultant
Tata Consultancy Services
07.2019 - Current
- Led the successful migration from Federated Authentication to Cloud Authentication, enhancing security and user experience.
- Expertly migrated applications from ADFS and ISAM to EntraID, ensuring minimal downtime and seamless user transitions.
- Extensive experience with OpenID Connect, OAuth, SAML, and Header-based applications, ensuring secure and efficient authentication mechanisms.
- Migrated applications to EntraID Application Proxy, optimizing secure remote access to on-premises applications.
- Utilized Microsoft Graph and PowerShell SDK to manage and automate EntraID operations, enhancing efficiency and reducing manual workload.
- Upgraded Azure AD Connect and resolved sync errors, ensuring seamless identity synchronization between on-premises and cloud environments
- Created and managed Service Principal Names (SPNs) for task delegation in EntraID through Microsoft Graph, enhancing security and access management.
- Managed Privileged Identity Management (PIM) and conducted Access Reviews to ensure appropriate access levels and compliance with security policies.
- Experienced in KQL scripting to analyze and extract valuable insights from Sentinel logs, supporting proactive threat detection and response.
- Designed and configured Administrative Units to streamline delegation and management of resources within EntraID.
- Performed FRS to DFRS Sysvol Migration, ensuring efficient and reliable SYSVOL replication.
- Configured Network Policy Server (NPS) by creating network policies, conditions, and reviewing logs to ensure secure and compliant network access control.
Lead Administrator
Wipro Technologies Ltd
08.2017 - 07.2019
- Primary responsibility for handling L3 incidents, ensuring timely resolution within SLA to maintain system stability and uptime.
- Engaged in P1 and P2 incident tickets, consistently meeting deadlines and ensuring high-priority issues are resolved promptly.
- Provided comprehensive Active Directory support for over 5,000 Windows servers globally in a 24x7 environment, ensuring continuous and reliable access management.
- Served as the Technical Team Leader for a 20-member team, guiding and mentoring team members to improve performance and technical expertise.
- Assisted the L2 support team with complex technical issues, providing expertise and support as needed.
- Actively participated in bridge calls with application teams to diagnose and resolve application-related issues, ensuring minimal disruption to business operations.
- Logged and managed complaints with Microsoft and other vendors, coordinating resolution efforts to address underlying issues.
- Documented new issues and solutions, maintaining an up-to-date knowledge base to facilitate faster incident resolution and improve team efficiency.
- Conducted detailed Root Cause Analysis (RCA) for recurring issues, providing insights and recommendations to prevent future occurrences.
- Responsible for automating day-to-day activities using Windows PowerShell, reducing manual effort and increasing operational efficiency.
- Created and managed SQL Always On clusters, ensuring high availability and disaster recovery for critical databases.
- Monitored ServiceNow incident and email queues, prioritizing tasks based on severity and business impact to ensure timely resolution
InfraTechnology Specialist
Cognizant Technolgies Ltd
09.2013 - 07.2017
- Led domain migration projects, including the consolidation of multiple forests and domains, ensuring smooth transitions with minimal disruption.
- Planned and executed the decommissioning of Domain Controllers, maintaining the integrity of the Active Directory infrastructure.
- Directed datacenter and domain migration projects, including server migrations using Platespin.
- Automated administrative tasks and data gathering with PowerShell, and managed Active Directory user migrations.
- Extensive experience in DNS management, Group Policy creation, OU structure design, and Sites configuration.
- Migrated Conditional Forwarder to Secondary Zone DNS, reducing TTL refresh time and improving DNS performance.
System Engineer
Sify Technologies Ltd
06.2011 - 08.2013
- Provided remote support for over 300 servers, managing Windows Server 2003, 2008, and 2008 R2.
- Configured and managed IIS, FTP, and Active Directory services, including group policies, OUs, and user accounts.
- Administered Exchange 2010, DNS, DHCP, and performed detailed RCA for system issues.
- Managed network configurations, including multiple NICs, static routes, and firewall requests.
Education
Diploma in Electronics And Communication -
Panimalar Polytechnic College
Chennai, India 04.2001 -
Skills
Identity Management: EntraID, Active Directory, Strong authentication,Life Cycle management
Certification
SC-300: Microsoft Identity and Access Administrator
Timeline
SC-300: Microsoft Identity and Access Administrator
04-2024
AZ-104: Microsoft Azure Administrator
04-2023
Associate Consultant
Tata Consultancy Services
07.2019 - Current
Lead Administrator
Wipro Technologies Ltd
08.2017 - 07.2019
InfraTechnology Specialist
Cognizant Technolgies Ltd
09.2013 - 07.2017
System Engineer
Sify Technologies Ltd
06.2011 - 08.2013
Diploma in Electronics And Communication -
Panimalar Polytechnic College
04.2001 -
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