David Hong Email & Phone Number

Canada

Key Achievements• Configured Global Site Load Balance (GSLB) for multi-site for medium to large organization for applications for over 5000 users; Microsoft Exchange 2013, Citrix XenApp 7.x • Acted as primary consultant to architect and implemented Smart Access solution with Single Sign-On with seamless end-user experience• Implemented Web Application Firewall for Canadian Insurance Company for E-Commerce platformRoles and Responsibilities• Deployed Citrix NetScaler Application Delivery Controller appliance as the primary ADC solution• Configured Citrix NetScaler as an application proxy for WEB 2.0 based and SaaS applications• Troubleshot TLS communication issues between proxy appliance and web application servers• Implemented 2-factor authentication solutions Citrix NetScaler as an SAML Identity Provider• Integrated RSA RADIUS authentication on Citrix NetScaler and configured client through RSA administration console• Created Group Policy Objects for securing Next Generation Endpoints for Single Sign On with Citrix Receiver Application with Citrix Storefront• Configured Web Application Firewall to protect against OPSWAT Top 10 Common Web Attacks

Brampton, Ontario

Key Achievements• Configured Microsoft Exchange 2016 with Seamless failover• Scripted configuration build process of Citrix NetScaler to reduce implementation time and optimization by 50%• Implemented Citrix Endpoint Analysis for large to enterprise organization for granular access control to network infrastructure and organization resourcesRoles and Responsibilties• Administered advanced Fortigate/Cisco firewall for multi-tenancy; implementing firewall access control list, creating NAT rules as well as adding blacklist/whitelist URL filters• Created whitelist and blacklist policies on WebSense Web Filtering Appliance and Barracuda Web Filter• Troubleshot Identity Access Management system with integration with Remote Access solution• Review authentication logs for user access to assist with incidence response• Utilized Packet Capturing tool (Wireshark) for network troubleshooting sessions and to resolve connectivity issues between servers and networking devices• Procured Wildcard SSLs and SAN certificates for managed and non-managed clients • Operated network triage security support for network related requests and service incidents for over 60 managed organizations• Configured system redundancy for ADFS and Microsoft Exchange Systems• Participated and engaged as an active member of the disaster recovery planning and execution• Conducted quarterly infrastructure reports against managed client network infrastructure; identifying potential bottlenecks and providing recommendations

Brampton, Ontario

Roles and Responsibilities• Operated as Tier 1 Support team for investigating into malicious attacks for viruses on terminal severs • Provisioned user accounts with Role Based Access Controls and Discretionary Access Controls• Updated antivirus definitions on terminal services and updated Symantec Endpoint Protection Management console• Provide initial troubleshoot of LAN/WAN systems for IPSec Tunnels connecting back to employer’s data center• Provide onsite support for network troubleshooting in networking closets and network room facilities• Replaced failed hard disks in SAN storage as a means of data recovery• Performed data recovery using data backup solutions to restore data on file server and user mailboxes• Administrated Mobile Device Management policies and profiles to end user deployments• Managed antivirus deployments with Symantec Endpoint Manager for workstation policies• Administered Microsoft Window Server 2008, 2008R2, 2012, 2012 R2 and 2016 operating sytems• Engaged in managing hypervisors; Citrix XenServer, Hyper V and Vmware ESXi (5.0-6.5)• Performed quarterly reports on client infrastructure to assess system criticality and system updates to product roadmap• Provide internal and external support for clients (printers, mobile devices, workstations)

The George Brown College Computer Systems Technologist is a 3 year program which involves theory and practicality of computer systems, networking and system administration. The third year introduces project management delivery and a field project to reinforce project management methodologies and foundations learned over the course of the previous semesters. The program provides a broad technical base across all IT systems establishing a valuable understanding of each core component.