SUMMARY:

Over 28 years experiences in network infrastructure design. Extensive experiences and expertise in IP network architecture, Core Routing/Switching design and implementations; Served as a Senior Consultant and Senior Engineer for companies . Two graduate degrees in Electrical Engineering and Physics. Flexible, results oriented and superior performer as project team leader as well as team player.

TECHNICAL SKILLS:

MPLS, MPLS/VPN, SONET , DWDM, ATM, Gigabit Ethernet , Wireless 802.11, Frame Relay, Confidential /IP , OSPF , Confidential, EIGRP , RIP2 , RIP, IS - IS, NHRP, IP Multicast, DMVPN, MGRE, QoS, Network Security, Firewall/PIX, IPSEC, VPN , Confidential IOS-XR/XE, ASR, CRS, NX-OS, VLAN Trunking, Spanning Tree, Confidential, SNMP , RMON , IPX, OSI, PPP, SLIP, Confidential, IT/SP Guru, ACE, Confidential, HP Openview, NetScout, Confidential Works/NMS, Confidential ACS, AAA, Unix, X-Window, NFS.

EXPERIENCE:

Network Architect

Confidential

Responsibilities:

• Served in Sr. Network consultant capacity for Confidential Technology/ Confidential . for global MPLS/Optical, network architecture design and implementation. Designed global MPLS VPN, MPLS/Optical transport network with Confidential SPG /IT Guru Network Planner, and Transport Planner. Designed and implemented DOD mission critical, fault - tolerant MPLS/Optical transport network infrastructures.
• Designed and implemented MPLS network infrastructure and MPLS VPN architecture; Developed network configurations of P, PE, CE routers for MPLS transport networks. Designed and implemented large scale network infrastructures involve MPLS, Confidential, OSPF, EIGRP, Confidential ASR 9000(XR/XE), CRS-X, Nexus, 7600, 6500. Designed secure VPN architecture, including MPLS VPN, DMVPN (Dynamic Multipoint VPN), and IPsec VPN platforms for DoD and other government agencies; Designed and implemented VRF (Virtual Routing Forward) architecture in MPLS to separate various DoD functional networks. Deployed MPLS/VRF configurations as well as implementation in DoD global network infrastructures.
• Performed network assessments, network traffic trending analysis for large scale enterprise networks, telecom service provider networks and DoD global networks. Performed global wide area network circuit analysis, circuit reroute impact studies, circuit provisioning and overall WAN circuit redesign for DoD /MDA. Performed network traffic analysis, capacity planning, and network design implementations. Performed network security assessment, secure VPN design.
• Performed network infrastructure design and implementation for Fortune 500 corporations, DoD and government agencies; Project tasks include: Wide/Metro/Local Area Network design and deployment; IP over network design; Large scale network architecture design, configuration and implementations; Systems involve: Confidential SONET ADM, ML series Gigabit Ethernet over SONET module, 7300/7600 series routers, 6500 switches, and Marconi ATM switches. Performed network architecture simulation, network traffic analysis and capacity planning using Confidential IT Guru/SP Guru and Flow Analysis. Designed and configured Confidential VNE (Virtual Network Environment) servers to input global network devices and map out network topologies. Performed network traffic and application analysis with Confidential ACE and Panorama. Designed DoD mission critical network infrastructure to deliver secure IP multicast, QoS services on high-availability network platforms. Architected and implemented secure DoD IPSec VPN global network.
• Performed Traffic Engineering of Confidential and Internet traffic among different Internet Service Providers (ISPs) using route-map, Local-preference, Prepend and other Confidential metrics. Designed MPLS network for airline network service provider. Developed and designed network traffic performance monitoring system based on Confidential IP-SLA probes (RTTMON, formally SAA (Service Assurance Agent)). The system monitors packet round trip/one way latency, jitters and response times of network traffics including VoIP, IP Multicast, and various IP services. Performed network architecture design in DoD classified network environment using encryption devices such as Fastlane and Taclane. Developed route redistribution mechanism between Confidential and OSPF for large scale international networks. Troubleshoot IP routing, SONET, ATM circuit problems with carriers. Performed SONET circuit provisioning, network performance testing, traffic trending analysis and capacity planning. Architected and implemented NTP(Network Time Protocol) infrastructures.
• Designed and implemented Layer 3 switching architecture. Conducted security and VPN architecture design. Designed and implemented network management platform to pro-actively monitor network activities.
• Conduct network consulting services in IP and optical network architecture design. Provide network planning, modeling, strategic solutions, and network support for DoD, telecom carriers and enterprise companies. Provided professional services include: network architecture design and implementation, network assessment, network performance analysis/testing, network capacity planning, network troubleshooting/debugging, network management and operation support.
• Conducted large scale switched VLAN design and implementations. Designed and deployed EIGRP/OSPF configurations, including route distributions and summarizations. Designed and implemented Layer 3 switching architecture, including Confidential Catalyst 6500, 4000, 3700, 3500, 2900 series switches and 7600, 7500, 7300, 7200, 3700, 3600 series routers. Performed VoIP configuration and performance test. Conducted security and VPN architecture design. Configured and implemented network security with Confidential firewalls. Designed and implemented wireless LAN, 802.11 architecture using Confidential Aironet product families. Designed and implemented network management platform to pro-actively monitor network activities.
• Conducted complex Wide Area Network design using ATM, Frame Relay and MPLS VPN technologies. Performed core backbone network design using Confidential 15454, GSR routers and SONET, DWDM, MPLS technologies. Conducted large scale IP, Confidential network design and implementation. Designed and implemented mobile IP networks for worldwide service providers. Developed and implemented VLAN architecture and IP subnet address scheme for client's complex IP network infrastructure. Designed and configured network security architecture using Confidential PIX and VPN technologies. Project lead for developing Confidential Content switching solution.
• Provided strategic guidance and solutions for service providers, telecom carriers and enterprise customers. Performed complete network architecture design, including ATM, IP backbone and optical network; Technologies involved: IP, ATM, SONET, DWDM, Gigabit Ethernet. Routing protocols involved: Confidential, OSPF, MPLS, VPN, VLAN. Switch/router configuration involved Confidential ATM switches, 12000/7600/7500/7200 routers, Catalyst 6500/5500 switches. Responsible for troubleshooting client ATM, SONET and IP network problems and issues. Conducted switch performance test on SONET APS, Diff-Serv/QoS, and MPLS using ADTECH, Confidential, Sniffer and other network testers/analyzers. Performed switch configuration test on POS (Packet over Sonet), ATM, and Gigabit Ethernet.

Systems Engineer

Confidential

Responsibilities:

• As a Senior Systems Engineer, SE III, in Confidential Core Network Group, Performed Optical/Core, MPLS network design.
• Provided end to end network architecture solutions using DWDM, Metro WDM, MPLS, SONET, Core Routing and ATM switching for various service provider customers.
• Performed technical support for Confidential product line of 15454 (Cerent Next Generation SONET ADM), 15200 (Qeyton Metro DWDM), 15540 (Metro DWDM), 15800 (Pirelli Long Haul DWDM) and DPT(Dynamic Packet Transport, RPR) technology.
• Responsible for supporting and troubleshooting customer WDM, SONET network problems. Active in various IP/Optical conferences to foresee future IP over Optical direction, and MPLS, GMPLS standard movements.
• As a member of Confidential Core Transmission Virtual Team (The Elite System Engineer team), Performed MPLS, MPLS/VPN switch network design, Core/backbone network design focus on Confidential GSR12000, 7600, Catalyst 6500, BPX/MGX ATM switches as well as 15454, 15200, 15800 and other core transmission product lines.
• Responsible for supporting and troubleshooting customer ATM switches, core routers, MPLS, Confidential and BPX network problems and issues.
• Attended Confidential 15454 (Cerent), 15800 (Pirelli), 15200 (Qeyton), 15540 DWDM, GSR12000 and BPX training.

Sr. Network Consultant

Confidential

Responsibilities:

• Worked with Confidential Service Provider team, Provided technical support, such as network design, troubleshooting, performance testing, Traffic Engineering and network management support for large carrier/ISPs, such as Sprint, Verizon, WorldCom/UUNET. Provided network design solutions for Verizon,Worldcom/UUNET's internet backbone. Set up network performance test environment equipped with Confidential, ADTECH, IXIA and other high end network performance tester/analyzers to perform router/switch performance test. The setup includes Confidential GSR 12000/7513, Marconi/Fore ATM ASX 1000/4000 switches, Confidential /Cascade CBX500 and B - STDX 9000 Frame Relay switches, Fujitsu SONET ADM (Add/Drop Mux). Performed SNMP/counter testing for all Confidential major line cards, interfaces, including: POS (Packet over Sonet), ATM, Gigabit Ethernet, Jaguar (channelized OC12), POET (Packet over E3/T3), HSSI, etc.
• Test network scenarios include: SONET/POS, ATM, Gigabit Ethernet, Frame Relay, Confidential, ISIS, OSPF.
• Designed fault protection Confidential network; Performed network assessment for client s large-scale multi-service (voice, data) enterprise network. It consists of SONET ring, microwave and Frame Relay network. Analyzed client s TDM (N.E.T)network and performance issues. Based on the network performance assessment data, designed an ATM multi-service (voice, video, data) network using Confidential IGX switches to replace the legacy TDM network.
• Designed and implemented large scale, fault-tolerant trading floor switch network for a major brokerage firm using Confidential Catalyst 6500/5500 and 8500 series switches. . Implemented Confidential Netflow feature on the switches to collect network traffic statistics and effectively control traffic flows.
• Worked with Confidential Optical Network Group on WaveStar (DWDM, Optical switch) product series including OLS400G(80 channel long-haul DWDM) and AllMetro/Metro-point DWDM systems; Performed WDM network design based on WaveStar product lines. Developed DWDM/Optical internetworking training modules.
• Project leader/manager, performed Broadband (Cable modem, XDSL) network architecture design and technology transfer for a major ISP, GTE. Performed network assessment, traffic trending, capacity planning for GTE. Performed network traffic analysis for Cable Head-End and Core Backbone network; eliminated traffic bottleneck by applying traffic engineering in all network paths and flows.

Senior Network Engineer

Confidential

Responsibilities:

• Project lead/manager for the corporate backbone infrastructure upgrade.
• Designed ATM network to replace the corporate wide area backbone infrastructure.
• Conducted ATM switch evaluation test among major vendors.
• Installed and configured Confidential ATM switches on the corporate WAN core backbone. Integrated PBX voice, video and data into the ATM switches to provide a full multi - service transport network over the wide area backbone.
• Designed and implemented redundant internet access using BGP4 with multiple ISPs, thus to provide full fault-tolerant internet access services for the company.
• Designed and implemented enterprise scale switched Ethernet using Confidential Catalyst switches. Converted large scale Token Ring networks to a fully per port switched Ethernet switch network. Analyzed network traffic pattern and developed a VLAN (Virtual LAN) infrastructure among all switched networks for the optimal performance.
• Implemented OSPF routing algorithm on all routers on Confidential network. Developed a VLSM (Variable Length Subnet Mask) scheme and using it along with OSPF to create the most efficient flat switch domains.
• Completely set up corporate enterprise network management system on SNMP/RMON platforms. Configured and integrated the system with HP Openview , NetScout (RMON), Confidential VLAN Director, Confidential Works and CiscoView to provide network monitoring, troubleshooting and detail traffic, utilization, event log reports. Developed a sophisticated threshold/alarm trigging mechanism to report any abnormal network behaviors, such as extensive broadcasts or high network utilization, and other network errors. Conducted network trend analysis and proactive network capacity planning based on the detail network statistics provided by the network management system.
• Designed and built corporate remote network access infrastructure, including communication servers, PPP, SLIP and ISDN access. Integrated USR/3Com Enterprise Total Control Modem system with Confidential access servers. Developed a large scale fault-tolerant remote access security system.

Senior Network Engineer

Confidential

Responsibilities:

• Designed Confidential campus backbone network for major clients.
• Designed Internet access architectures using Confidential routers and other dial-up routers.
• Implemented IP address assignment algorithm for large complex/remote networks.
• Enhanced network performance by segmenting subnets with Ethernet switches.
• Using Sniffer to troubleshoot and analyze Confidential protocol stacks/packets in order to resolve interoperability problems in heterogeneous host and multi-protocol platform environments.

Senior Systems Engineer

Confidential

Responsibilities:

• Designed and implemented nationwide enterprise network including WAN/X.25, Confidential backbone and LANs (Token Ring, Ethernet).
• Troubleshoot/debug Confidential /IP traffic using HP and Sniffer protocol analyzers.