Gajan Rajaratnam

• Enterprise administrator for BMO Financial Group’s Active Directory forests which includes over 40, 000 users, across 10 domains and 128 domain controllers. • Implementation and support of virtual environment which includes virtual domain controllers running on multiple hosts. • Perform daily operations support and maintain currency with new technologies for the bank-wide Active Directory infrastructure. • Installed, Configured and manage Azure AD Connect to integrate on-premises identity infrastructure to connect with Microsoft Azure AD and Office 365 • Upgraded Azure AD Connect from 1.1 to 1.265.0 • Implemented and manage Azure MFA for the portal administrative accounts. • Implemented and maintaining the Synchronizing Directory from On-premises to Office 365 using different Identities as per business needs. • Have extensive knowledge and experience in creation of SPN, keytabs with various encryption methods, Kerberos delegations, troubleshoot Linux servers/Linux based applications with AD authentication issues. • Have involved many ADFS projects - Built and maintaining multiple ADFS farms with many IDP & SP initiated Relaying parties trusts. • Involved and completed successfully several ADFS farm upgrade ADFS 2.0 to ADFS 3.0 • Successfully completed multiple ADFS farm certificate renewals. • Created reports in ServiceNow for management to review how an incident/task re-assigned by various team • Lead resource for SOX Audit for User Access Management, Change Management, Removal of Access, Password Management and all AD infrastructure related • Created checklists and collected audit data for compliance with SOX

 VMware virtual infrastructure Architecture, Management & support - Installed & configured VMware vSphere4.1/vSpgere5 environment with clusters including HA & DRS. Monitored the performance and make suggestions to the management. Maintain and support all VMware infrastructure components including licensing, data stores, networking, backup solutions, deploy guest machines, upgrades and templates/images for builds, host profiles, update manager & auto deploy hosts. Carried out patching and upgrades from VMware 3.5 to 4.1 & from VMware 4.1 to 5.0 Involved & designed polices to monitor the environment, configured SMTP notifications. Also designed and implemented security by adding, modifying and removing users and groups, also define and apply roles and permissions for securing virtual guest OS.  XenApp5/6 - As a Citrix administrator, implemented & maintained the Citrix Farm using XenApp 5.0 and 6.0 with Windows 2008 Server on VMware virtualized environment in a larger scale. Support application integration, management, deployment, publishes and/or streaming technologies and part of team responsible for escalation  Active Directory – Built and configured windows 2008 R2 AD environment & completed the windows 2003 Active directory infrastructure demotions successfuly.  Microsoft Exchange 2010 migration – Involved in planning sessions, architect & designed Exchange 2010 environment and completed success of migrated approx 2000 mailboxes all within a virtualized environment  MS Lync server built, setup, configured & managed for cooperate and customer care users.  Microsoft PKI – Involved in planning sessions, designed, implemented the two PKI (Two-tier CA hierarchy) and decommissioned the old environment  Datacenter Migration – Heavily involved in several tasks and completed successfully transformation of the data center using virtualization technologies to increase capacity, improve performance and lower management costs

 Designed and implemented the overall company’s WAN/LAN Network infrastructure to meet the internal/external applications usage and productivity.  Manage and support the LAN environment with 11 Microsoft Windows 2000 servers, 17 Microsoft windows 2003 servers, Windows 2003 AD with Exchange 2003 Server, SQL 2000 Server, Microsoft CRM and ISA Server 2000 with over 600 Windows XP/2000 terminals (DHCP/DNS/WINS/Global-Catalog/Print servers in each location).  Installed, configured & administer MS Exchange 2003 & clustered.  Responsible for troubleshooting Directory Replication, Mailbox stores, Message routing, Message Flow, SMTP Connector Configuration, Public Folder issues and ADC connection agreements.  Resolved disaster/recovery of storage groups, presented users with customized solutions for disaster/recovery backup solutions to ensure minimal downtime.  Implemented and maintained VPN and remote connectivity (PC Anywhere & VNC) to branch office in Toronto, Winnipeg and New York.  Maintained Symantec Antivirus Corporate edition (configure & update the signatures and dat files)  Install, configure customize, Microsoft CRM, generate weekly & monthly variety of CRM reports.  Configured and Managed the TopLayer Attack Mitigator IPS & McAfee Intrushield IPS device for defends against devastating security threats including Hackers, Trojans, Web Server Attacks, Worms and DDoS Attacks, protocol and traffic anomalies, IP spoofing, SYN flood attacks.  Using Airmagnet wireless solution, the following tasks were done to secure the network.  Wireless Intrusion Detection & Prevention, Rogue AP Detection, Tracing and Blocking.  Construct and manage detailed security policies through an intuitive policy management interface  Wireless LAN Site Surveys & Determine Ideal AP Placement and Power Settings  Quantitatively analyze sources of RF interference and noise

Set up and Configured Windows NT/2000 with the following features for Global IT.  Setup Active Directory with DNS.  Active Directory with GPO (Group Policy Object) to provide high security.  NAT (Network Address Translation) services to provide private IP network to communicate with outside world using Remote admin.  Set up Exchange server 2000 on domain controller and restore all the data from the old system.  Set up Backup server and Schedule the services.  Diagnosed, troubleshot and solved PC/Laptop issues ranging from operating system, hardware/software applications and network connectivity  Performed hardware/software installation, de-installation, support/upgrades, moves, adds and changes  Created and used Desktop Imager to restore Microsoft desktop applications on laptops and desktops; performed configuration according to the documentation