David Chan Email & Phone Number

Chicago, Illinois, Us

Bronx, New York, Us

New York, New York, Us

• Responsible in all technical aspects of LAN, WAN, Wireless, VoIP, VPN and security internetworking projects including, short and long term planning, implementation, project management and operations support as required.• Administrate and maintain the security policy on Juniper Firewalls such as ISG1000/2000 and SRX 1400 using NSM, and Cisco ASA 5500 series using SDM.• Administrate and maintain the security policy on Juniper SSLVPN appliances such as SA2000 and SA4500.• Administrate and maintain A10 LTM Load Balancers for Web application.• Administrate and maintain Cisco and Aerohive wireless network infrastructure.• Administrate and maintain Bradford Network Access Control (NAC) service.• Test and evaluate various equipment, systems, IOSs and procedures for use within the network infrastructure. • Continually monitor, assess and improve network security, test and implement new security technologies.• Schedule proposed network changes and worked with major business units to identify their impact.• Member of NY Headquarter Relocation team responsible for designing and planning of the migration of the datacenter and data/voice network. Minimize the downtime during migration for smooth transition.• Member of Emergency Responder team for the Network Engineering group on all major issues, such as outages, circuit issues, networking/security issues, and VoIP issues. Work with Cisco TAC, Level 3 and Zayo Support teams to resolve the problems. Provide support after normal business hours and respond to emergency work requests in critical situations.

New York, New York, Us

• Responsibilities include on call support for Level 2/3 network issues, change requests, configuration, maintenance, and redesign of the network. • Monitoring the network performance and utilization on all of Cisco routers/switches, Juniper firewalls, Juniper SSLVPN appliances, and A10 LTM Load Balancer.• Troubleshot multiple protocols including IP, OSPF, EIGRP, BGP, HSRP, STP, and VTP on Cisco routers and switches.• Interacted with a variety of telecommunication vendors (Cisco TAC, JTAC, Abovenet, AT&T, Verizon) who provided physical connectivity, circuits include (DS1, DS3, Frame-Relay, ISDN PRI/BRI, Metro Private line, DSL), guaranteeing uninterrupted production abilities. • Configured and Troubleshot Cisco routers 2600, 3600, 2800, and 7200; Catalyst switches 2950, 2960, 3550, 3750/3750X,4948, and 6513.• Maintained Visio documentation database of network topology and helped establish guidelines and standards for change procedures.• Managed traffic filters using Standard and Extended access-lists, Distribute-Lists, and Route Maps.

Stamford, Ct, Us

• Member of project planning team on datacenter migration project.• Mapped internal network infrastructure of approximately 400 servers and a multitude of network devices. • Documented the physical and logical connectivity of all Cisco switches, routers, Checkpoint firewalls, and other network appliances in the network• Wrote comprehensive move plans on all servers and network devices with minimal down time• Configured and troubleshot Cisco series routers 2600, 3600, 2800, and 7200, Catalyst switches 2950, 2960, 3550, 4948, and 6513 • Work closely with network architect and engineers on troubleshooting any network issues arise during the datacenter migration

• Designed, implemented, and configured network service using SonicWALL Network Security Appliance • Implemented, and configured Microsoft AD, DNS, Printing, FTP, and Exchange 2003 services • Provided technical support in network, server, and desktop (Macintosh and Windows)• Performed software and hardware installations and technical support in accordance with client priorities• Monitored the integrity of servers, user connectivity, and telecommunication service• Obtained quotations for computer equipment, software, and local services as required • Made recommendations for network software, hardware, and telecommunication venders to client • Troubleshot performance and connectivity issues on Microsoft Exchange 2003 Server and print server• Provided Macintosh users with access to files stored on a file server running MS Windows Server 2003.

Santa Clara, California, Us

• Built Microsoft Windows 2000 and 2003 Servers, Windows 2000/XP workstation, and Linux workstation for Engineering Validation labs• Administrated and maintained the Microsoft 2000/2003 servers (FTP, IIS, Print, License) and the network of Engineering lab domain• Setup and maintained the network security on servers and workstations according to Intel security guidelines• Backed up and restored Windows and Linux systems using Norton Ghost Enterprise edition• Analyzed and debugged all types of workstation, server, and network issues• Installed and configured system hardware in Win NT, 2000, XP, and Linux 7.0 and 9.0 workstations• Setup and configured networking devices such as network interface cards, hubs, Catalyst 2924 switches, and Cisco 2621 router for product validation test• Setup and configured WAN components (Async/Sync serial, ISDN BRI/PRI, frame relay)• Performed rollout of Windows 2000 and XP to the systems in hardware engineering test labs• Designed and implemented system backup and restore service using Norton Ghost Enterprise edition