Danny Tsai

Technical Certifications
Cisco Certified Internetwork Expert #17266 (CCIE-RS)
Cisco Certified Internetwork Expert #17266 (CCIE-Security)
Cisco Certified Internetwork Expert #17266 (CCIE-Service Provider)
Cisco Certified Internetwork Expert Voice (In Progress)
Cisco Certified Systems Instructor #32658 (CCSI)
Cisco Certified Network Associate (CCNA)
Cisco Certified Design Associate    (CCDA)
Cisco Certified Network Professional (CCNP)
Sun Certified Solaris System 8 Administrator

Work Experience

04/2007 – Present    Sirius Packet Solutions, Inc             Corona, CA
Title: Principal Network Consultant            Company Function: Consulting

Primary engineer for an independent consulting firm focused on large network deployments, architecture design refreshes, and enhancements. Expertise primarily focused on core network design, implementation, and documentation. Along with data center design and improvements.
Hands on with the latest network technologies such as Cisco WAAS, F5 BIG-IP GTM/LTM, Juniper SSL VPN, Juniper firewalls, Cisco Optical Transport (ONS), Cisco ACE Module, Cisco ASA/FWSM Firewalls, and among others.

Major Clients and Projects  –

Comcast Entertainment Group (E! Entertainment, Style Network, G4 Television):
Design and implement optical 40G DWDM network utilizing latest Cisco ONS15454 MSTP optical equipment, gathering dark fiber leases, and building 10Gbps metro Ethernet core network.
Implementation of redundant and load balanced Cisco ACS for radius/tacacs authentication for future expansion on 802.1x port security and improved network device management inventory.
Allocation of IP network strategy and route summarization scheme for entire network infrastructure. Including 5 data centers and collocation facilities along with multiple branch offices. Improving IP routing efficiency and OSPF convergence times, reduced failover time on most areas of the network to sub-second, and thus greatly enhancing customer experience.
Network Virtualization: MPLS core and edge label switching implementation. Virtualized routers and routing protocols to efficiently utilize the network and improve security between business units. Developed templates for MP-BGP configuration to operate VRF in multiple locations.

Symantec Corporation:
Designed the next-generation data center using MPLS VPN and MPLS CsC to expand network functionality while meeting strict security and other customer requirements.
Developed configuration of over 90 Foundry MLX-16 L3 switches, multiple Juniper NS-5400 firewalls, and F5 BIG-IP LTM load balancers in 120,000 sqft data center facility and spearheaded the project from start-to-finish. Opened the path for existing engineering team to have exposure to BFD, OSPF, MP-BGP, MPLS VPN, Label Distribution Protocol, and Virtual Routing.
Authored documentation of MPLS-enabled data center, Expertly designed Visio diagrams and composed architecture overview design document that detailed exact technologies.

IndyMac Federal Bank:
Cisco Data Center 3.0 deployment by redesigning and rebuild existing data centers to utilize the latest products and services available such building configuration templates/standards for the Cisco ACE modules, ASA5580 firewalls, Cisco Wide Area Application Services (WAAS 4.0.19), Nexus 7000 switches, along with 6500-NEB-A switches in VSS-1440 implementations.
Provide 3rd tier support for network troubleshooting, outage situations, and unexpected device behaviors such as identifying bugs, improper configuration, and verify best practices.
Principal engineer for large design projects and “last resort” troubleshooting scenarios.
Document new deployments and improve network availability by implementing features to enhance failover response times such as stateful failover and non-stop forwarding in routing and switching protocols (NSF, SSO, Graceful Restart, MST, Rapid STP, GLBP, IP SLA, IOS OER)

eBay Inc:
Support network infrastructure trouble issues and capacity planning for bandwidth allocation.
General network staff augmentation to increase service productivity and team efficiency.

Global Knowledge/ICM:
Technical course instructor for Cisco advanced data center and general routing courses.
Provide training from beginning network technicians to advanced level engineers.

09/2004 – 03/2007    IndyMac Federal Bank             Pasadena, CA
Title: Senior Network Engineer            Company Function: Financial

Department lead engineer responsible for architecting/maintaining LAN and WAN in retail banking, mortgage lending, and other financial products in all data centers and regional offices.  Duties include proactive monitoring of network health, provisioning new network installation, design redundant and stable network infrastructure, clearly document activities and provide clear concise reports to management.

Provide 3rd tier support for all network services including VLAN changes, Cisco VOIP services, and WAN circuit provisioning and various IP multicast troubleshooting.
Principal engineer for design, deployment, and securing wireless, data center, regional LANs, and wide area network data infrastructure using WAN acceleration, Cisco ACE/F5, 802.1x, and other technologies. Lead in initiatives to improve and enhance ALL network infrastructures.
Troubleshoot over utilized WAN circuits ranging from T-1, DS-3, OC-3, 10GE, and Microwave.
Providing detailed real-time traffic analysis of network usage using sniffers, netflow, and nTop.
Cisco router and switch configuration.  (Cisco 2800/3800/7200VXR/Catalyst 6500[sup720]).
Management of Nokia firewalls, Cisco PIX, Cisco FWSM, and F5 Load Balancers (GTM / LTM).
Expertly designed and configure MPLS/BGP networks and documenting IP traffic engineering.
Lead in Data Center design and refresh of network technology within IndyMac Bank.
Subject matter expert of Multicast, QOS, WAAS, BGP, Wireless Infrastructure technologies.

01/2003 – 08/2004    China Telecom      Los Angeles, CA
Title: Network Engineer            Company Function: ISP

Functions include building out and maintaining IP network in the United States.  Develop traffic engineering for international STM/SONET circuits to China. Troubleshoot network routing and latency issues in a 24×7 environment. Heavy involvement in QoS/BGP/ISIS routing and able to think creatively in order to get problems resolved, and highly motivated to complete IP network projects.  Actively worked with executive officers to maintain project status and efficiency; provided technical and statistical weekly reports to the VP of Network Operations.

Provision and maintain nationwide optical network consisting of Cisco 12000/12400 GSR series core routers and Cisco ONS 15454 DWDM transport switching equipment.
Responsible for increasing network backbone capacity of international IP traffic from US to China consisting of over (40) OC-3 circuits and (8) OC-48 optical circuits.
Monitor nodes using: Concord NetHealth, MRTG/RRD, UNIX open-source software.
Responsible for VOIP gateway (Cisco AS5350) provisioning and lead telephony projects.
Maintain international IP nodes to China and test circuits with CHINA/US undersea cable station.
Work closely with domestic peering networks and international ISPs in bringing up new IP service or optimizing network routing, very heavy BGP routing and ISIS involvement.
Design and deploy Cisco CoS, QoS, and WRED to traffic engineer latency and congestion.
Optimized IP peering BGP routing policies and test OC-3/OC-48 circuits.
Promoted wide-use of GNU open source software for all Linux or FreeBSD systems for VOIP billing, IP interface bandwidth, BGP routing table prefixes, and latency monitoring for cost effective solutions.

08/2001 – 12/2002     XO Communications    Irvine, CA
Title: Lead Data Center Engineer            Company Function: CLEC

Responsible for hosting platform product engineering, enterprise server platform engineering, data center network engineering/design for the global data center teams.

Maintain nationwide data center network of over 50 core routers, 300+ Cisco Catalyst switches.
Monitor network nodes with CiscoWorks, NetCool, Compaq Insight Manager, and RILOE boards.
Configured and installed Cisco 2900XL switches, Catalyst 6500 series, and 12000 series routers.
Provisioned customer production servers on Linux, Windows 2000, and Sun Solaris 8 platforms.
Coordinate with technical sales engineers to implement feasible and scaleable customer solutions
Provide direction and guidance to other network administrators while taking lead on diverse projects and daily systems tasks
Design, structure, and implement quality assurance policies and risk analysis procedures
Provide 24×7 operational support and maintenance for demanding technical environment.

07/1997 – 06/2001    Multa Communications    Industry, CA
Title: Network Engineer                Company Function: ISP

Responsible for IP network engineering and data center network design, monitoring, and other functions include handling troubleshooting escalations. Implement and support Internet access/data center products in a 24×7x365 operating environment.

Responsible for implementing setup on routers and core switches in new sites.
Setup OSPF on internal network and set BGP peering between other ISP’s.
Trained team members on using HP OpenView, Lucent NavisCore, basic Cisco device operations, Lucent CBX500/GS550 ATM switch operations, and PIX 520.
Built ATM and Frame-Relay circuits for DSL/T-1 customers.  Worked on the Lucent Stinger DSLAM, RedBack SMS 1000 Routers, and Extreme Switches.
Maintained relationship with CLEC providers such as Verizon, SBC, and BellSouth to streamline provisioning processes of new T-1 and DS-3 circuits.
Management of Cisco ONS 15454 devices, IP provisioning, ATM circuit provisioning.
Performed initial tests on MPLS deployment and IOS revisions in test networks.
Install and maintained modem dialup POP in different cities, worked on 66/110 blocks, troubleshoot ISDN PRI circuits, and installed PRI on digital PBX systems.

Education
02/2004 – B.S. Degree (Network and Communications Management), Pomona, CA

Equipment Knowledge

Lucent CBX 500 ATM Switch        Cisco 15454 ONS    Adtran 2800 DS3 Multiplexer
3Com Total Control Modem Bank        Catalyst 6513 Switches    Juniper M20 Backbone router
Cisco 7513 series routers            Foundry Core Switches    Cisco PIX/FWSM Firewalls
RedBack SMS 1000 Router        Cisco 12400 GSR routers    F5 BIGIP and 3DNS Systems
Extreme Network Switches        Juniper Netscreen FW    Linux/FreeBSD Operating Systems

Additional Technical Skills
Dedicated to networking technologies and have extraordinary work ethics.
Experience in configuring Alteon / Cisco IOS / F5 load-balancing content switches
Experience with several UNIX based firewalls (ipchains, iptables, IP filter).
Experience with copper/fiber multiplexers (Cisco ONS, Nortel TransportNode, Adtran).
In-depth knowledge and experience with network technologies and concepts including: IP Packet Sniffers, NetFlow, EIGRP, RIP, OSPF, BGP, POS, SNMP, Cisco PIX, Ethernet, ATM, Frame-Relay, VLAN 802.1Q, QoS, and VOIP telephony gateways (Cisco VG224, CME)
Knowledge of UNIX Servers: Sun Solaris, Apache, MySQL, FreeBSD, RedHat, Fedora Linux.
Ability to maintain, implement, troubleshoot, publicly accessible UNIX servers including WWW, FTP, DNS, SQL Management, and SMTP/POP3/IMAP servers.
Actively involved in open-source VOIP gatekeeper and billing software for cost effective voice switching solutions. Familiar with ISDN and SIPv2 protocols for local POTS or IP voice calls.

References, Accommodations, and Recommendation Letters Available Upon Request