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Sr. Individual Contributor / Sr. Network Architect / Sr. Software Engineer / Sr.

QA Engineer
/ Sr. Technical Support Engineer / Founder and Seasoned Instructor actively involved in
Advanced Research and Development of networking software for the U.S. Government Agencies
(NSA, CIA, FBI, DoD, U.S. Weapon Systems, NASA, Lockheed, NAVY, Air Force, ARMY, County
of Marin, Bay Area Air Quality Management, NGC, DISA, etc.) and commercial industries. Over
30 years of wide ranging experience, including teaching at the university level.


HARDWARE & SOFTWARE: PCs, Sun, Mac, Network Cards, MAUs, HUBs, LAN/WAN
Switches, ATM Products, Optical Communication Products, Bridges/Routers ( C6500, C4900,
C2900, C2600, 3560E series, Cisco 25xx, 36xx, 4000 & 7000 series, GSR, HFR (Terabit Switch
Router), 3COM Products), DSU/CSU, Muxes, Terminal Servers, Cascade Frame Relay Switch,
Sniffer, Traffic Generator, Digitizing Oscilloscope, Microtec X-Ray, Navtel Protocol Analyzer,
Telenex Interview Network Switch Emulator, HP OpenView, Network Encryption Unit, Network
Management Stations, Cisco IOS, Cisco ENA, Extreme Networks Products, D-Link Wireless
Broadband Router, Earthlink BroadMax DSL Modem, Adobe GoLive, Dreamweaver, Cisco
Catalyst, Network Security Products (Safenet IRE Client, SonicWALL VPN/IPSec product,
ActivCard, Baltimore Unicert, Entrust/PKI, Microsoft Baseline Security Analyzer, Ethereal, Harris
Stat Scanner, LC4, Ping Plotter, Sam Spade, Super Scan, Trip Wire, Web Ferret, WS Ping Pro,
ISSNT, Air Snort, AP Scanner, Dstumbler, Net Stumbler, PIX Firewall, Symantec Norton Internet
Security 2003, Symantec ManHunt), VMware, Cisco CallManager, Tasker, WatchGuard Firebox X
Peak/Core e-Series, Qualys AuditScan, AccuRev, IXIA 1600T, WWP LE-311v, Mercury Quality
Center 9.0, Juniper M20, CloudShield CS-2000, Extreme Network Products, EPICenter, SoapUI,
2Wire Home Portal 3000 Series, CMS (CPE Remote Management System), HP Proliant Server,
VNC, iPad 2, Dell EqualLogic Storage Array, Dell OpenManage Essentials, Dell PowerEdge R710
/ R910 Systems, Packet Tracer 6.0/6.1, Squish, Eclipse IDE, NETLAB+, vSphere, vCenter, MS,
ESX host, Cisco Cloud and System Management Technology, REST API, OpenStack, VMWare

OPERATING SYSTEMS: UNIX (BSD, SYS V, Linux, Fedora, Red Hat, SELinux, CentOS), Win
98/Win 2000/Win XP/Windows 7, NT, POSIX, Real-Time Embedded OS (VxWorks, pSOS,
Nucleus RTOS, RTX, QNX).

PROTOCOLS: TCP/IP, OSI, AppleTalk, IPX, WAN (PPP, cHDLC, X.25, Frame Relay, ATM, xDSL,
VPDN), LAN (Ethernet, Gigabit Ethernet, Token Ring, High Speed Token Ring), Routing
Protocols (RIP, IGRP, EIGRP, OSPF, Integrated IS-IS, BGP-4), Bridge Protocols (IEEE 802.1d),
Network Management (SNMP v1/v2/v3), UNIX Networking, VoIP, MPLS, VPLS, VPN and Traffic
Engineering, VLAN, ESRP, QoS, Content Delivery, SAN, NAS, Network Security (Internet
Security Monitoring and Filtering, VPN/IPSec, Firewalls, PKI, AAA, SSO, IDS, Intrusion
Prevention, Policy Based Provisioning, Wireless Security, Cryptography, SSL), LDAP, EMISTP,

PROGRAMMING LANGUAGES: C, C++, Pascal, Ada, Shell, Tcl, Perl, Pthreads, Java,
Python, Jython

CERTIFICATION: Extreme Network Certified Expert, CCNA (Cisco Certified Network Associate),
Certified CloudShield Solution Developer


Aruba, a HP Enterprise Co. / Cal Lab Solutions, Inc., Santa Clara, CA
Jan. 2017
Independent Consultant

Backup and Restore. • Tested REST API and CLI on tail-f/CC/ESC components and automated them in Python/Jython under OpenStack. technologies. writing automation scripts. • Tested Layer 2 and Layer 3 protocols like Firewall ACL.Jan.9. parts of Cisco Mozart solution. A very short term contract  Installed and brought up QEMU/KVM environment on all 8 HP ProLiant DL 360 Gen 9 servers and deployed different VMs on KVM servers on the same rack at the data center at Aruba. 2012 .  Studied and practiced Python. 2014 .. Perl more in depth. CA Jul. Gray Hat Python..Mar. reported bugs and provided detailed bug reports through the project life cycle. 2014 QA Project Lead (CISCO) / Sr. San Jose. vCenter. "AT&T CMS 3. MS. NAT. Eclipse IDE. Inc. and controls deployed to protect data. MPLS on Cisco ASR 9k. 2014 QA Consultant • Tested "6HD-Light Gig RG". dynamic) on CSR1000v. Jun. "AT&T CMS 3.1 development using Python. and the associated infrastructure of cloud computing under OpenStack cloud environments. CA / Persistent Systems.. Routing (static. and filing bugs) for Packet Tracer 6. VMWare environment using Python • Tested Intellego 6. "Mauna Jea 6. Black Hat Python. DNS. KWANGNET. Zones. VMC. etc. San Jose.0 product using N* Simulator. ESX host.1. Squish. and submitted ClearQuest CRs Cisco Systems. Fusion-io and SS8. VMWare environment. CA Jan . Software Engineer) • QA works (testing. Talon HA. "NVG510 VOIP Configuration Settings". Violent Python CISCO SYSTEMS. 2013 QA Consultant (Sr. San Jose. Java. • Executed appropriate test methodologies such as manual and automated functional and regression tests through the development iterations. • Designed and executed test plan and test cases for tail-f/CC/ESC components. Architect (Persistent) • Worked at Cisco Cloud and System Management Technology Group on Cisco Mozart Solution. 2015 - Present Founder  Researched in Cloud Computing Security which refers to a broad set of policies. Inc. NTP. a HP.Dec. MR5" • Tested ioTurbine/ioVDI for performance under vSphere. • Attended Agile Training AT&T Labs.4 Targeted Ad Insertion Configuration MOP". CA May 2013 .0/6. Policy Based Routing. documentation.. DHCP Cisco PNR. San Jose. • Tracked. INC. C++. Inc.4 5168NV BDC Configuration". • Worked with other test engineers and development teams on extending test automation. additionally Python with Network Security such as Python Penetration Testing Essentials. applications.45 Firmware Upgrade Testing. testlink. "Disable VOIP For Supported Motorola RGs". NETLAB+ .

Java under Windows/Linux UNIVERSITY OF CALIFORNIA.". 2010 . and Hitachi High Technologies America..Network Security. This is to make sure the bulk transferring from IPTV servers are marked as Best Effort if originating from port 4900-4999. VMWare. San Jose. and provided slides "Policy Configuration of PCEF. 2010 Consultant at Network Architect Group  IPTV-DCOLL Project (Light Speed Unified Data Collection Project)  Worked on the solution to help the legacy data collection migrating to UDC architecture. Redhat.Jul. Inc. 2009 . "Business_Requirements_For_LTE_UDC"  E2E (End-to-End) Policy Configuration Project  Discussed about "LTE Policy configurations”.• Presented IPSec at Internal Symposium • Scrum/Agile environment DELL/AT&T/TURN.Routing and Switching. and "Tier-2 SCOM management responsibility"  LTE (Long Term Evolution) UDC Project  Discussed about "LS UDC slides & LTE UDC req. Inc. AT&T Labs. and submitted a proposal to Operations Users and PSL Lab to Solve CR3753. trained FSEs to release the products. If this rule is removed. and resolved customer issues. "CuteFTP 8 Professional”. CMS (CPE Remote Management System) using TR-069. CA Mar.1”. and provided slides "Lightspeed UDC Overview". Python. Inc. Pleasanton. This request is for opening ports 20 and 21 from the IPTV servers to the Tier-1 DCOLLS and from the Tier-1 DCOLLs to the Tier- 2 DCOLL. 2014 Instructor  CCNA . 2010 QA Consultant  Tested 2Wire Home Portal 3000 Series. Networking Basics for Non- Technical Professionals . SoapUI. CG4000 and CG5000). The new firewall rules only allow 4900-4999 passing through for the data collector traffic.  Discussed about "AT&T/ALU Architecture Network Capabilities".Apr. CCNA . "IPTV-DColl / DB Backup & Restore Project".  Tested various ftp clients including “Core FTP LE 2. 2011 .Dec.. BERKELEY EXTENSION Evenings Sep. CA Sep. “Cygwin”. i- Frame.  CR3753: Change to Data Collector flows. CA Feb. 2010 . San Ramon. This flow will be used by legacy Data Collector flows.. the bulk data transferring will subject to risk to compete with other traffics through the firewall link. and i-Recipe under Fedora.Draw a graph for Rx Util % and Tx Util % 2Wire. 2012 QA Consultant  Supported DELL/AT&T/TURN Systems at QTS Data Center  Tested CD-SEM (Hitachi’s CD-Measurement SEM. PCRF and Gx"  Some answers and insights into the questions about 3GPP standards  Analysis of IPTV UDC traffic . VNC environment for INTEL.Dec. e-Admin.

2007 .  Reducing active backlog by 5% month over month  Closing cases within 30 days other than exceptions such as Wait/software. Sunnyvale.11i. Linux/UNIX/Windows operating systems. recreating. and Experience of network test equipment (IXIA) and network management tools. maintaining and managing customer network monitoring systems. diagnosing and resolving technical customer issues associated with company’s equipment on-site at the customer site. phone shifts and weekend shifts. DoD. and maintaining on-call phone availability. TCP/IP). diagnosing and resolving technical customer issues associated with company’s equipment on-site at the customer site. HTTP. providing feedback from customers to product management and engineering teams via appropriate systems. on-site upgrade activities or investigations of reported problems. email or onsite support (if required).Extreme Networks.  Performing. Spirent) and network management tools. etc. providing informal and/or formal training on company products to the customer's staff. engineering and product management to escalate and resolve issues.  Automation script in Tcl.  Used Advanced networking skills. and verifying software defects in the field or under lab conditions reported by customers.  Troubleshooting. as required. Santa Clara. and maintaining on-call phone availability. recreating. providing feedback from customers to product management and engineering teams via appropriate systems.Nov. Technical Support Engineer  Supported Extreme Networks Products under ExtremeWare and EXOS using Siebel System  Troubleshooting. Technical Support Engineer  Supported CS-2000 and performed RFC 2544 throughput test using IXIA for NSA.  Replicating and testing customer configurations in a lab environment.  Working according to shift schedule. WPA2/AES/802.  Experience in WLAN testing in advanced/security protocols (WEP.  Developing 3 or more Solutions per month  Used Advanced networking skills. Interfacing with other technical support personnel.1 xs.11e. engineering and product management to escalate and resolve issues.  Experience of WLAN. 2007 Sr. tracking.  Providing entitled customer base a very high quality of support experience either via phone.  Providing entitled customer base a very high quality of support experience either via phone. 2008 Sr. maintaining and managing customer network monitoring systems. on-site upgrade activities or investigations of reported problems. and verifying software defects in the field or under lab conditions reported by customers. SNMP. providing informal and/or formal training on company products to the customer's staff. 2006 .  Experience of Functional / Feature Testing as well as System Testing.  Performing.Aug. tracking. Perl CloudShield.  Experience of using network monitoring and analysis tools to debug Ethernet/Wireless/IP layer problems. phone shifts and weekend shifts. 802. Firewalls). CA Oct. IPSec VPN. WME/WMM/802. L2/L3 (Ethernet. WPA/TKIP. and Experience of network test equipment (IXIA. as required. email or onsite support (if required).  Replicating and testing customer configurations in a lab environment.  Working according to shift schedule. Interfacing with other technical support personnel.  Reducing active backlog by 5% month over month  Closing cases within 30 days other than exceptions such as Wait/software. . CA Dec.

2005 Founder  Provided training classes for Network Security.  Automation script in Tcl. KWANGNET (www. and scanned using Qualys AuditScan (on-demand security audit and vulnerability management service). SYMANTEC Corp.3 ProviderBackbone Transport (PBT) using WWP LE-311v.kwangnet. INC. Citrix Design Studio for Cisco. Nortel. Santa Clara..0. TCP/IP).Sep. TCP/IP. CCNA.Dec. and designed websites for centralized security management (KwangNet). WatchGuard Technologies. HTTP. IXIA 1600T. CA Evenings Jan.  Experience of Functional / Feature Testing as well as System Testing. and tested Citrix Application Gateway. INC. Mercury Quality Center 9. Inc. CA Apr. and CITRIX. and encryption devices for wireless security (Cinensis.. Mobile User VPN Tunnels. 2002 - 2003 Founder/Co-founder of 3 Startups  Built a team. PPTP User VPN Tunnels for Pandora 9. 2002 . VNC. WINCOM SYSTEMS. defined a business plan. San Jose.  Tested Branch Office VPN Tasker and VMware. test plans. CA Jan. and AccuRev. and Bay Area Air Quality Management 2003 Consultant  Researched. Web Design. County of Marin. Inc. 2003 .. 2005 . and CINENSIS. 2002 Senior Development Test Engineer .  Tested and implemented automation scripts in Tcl.  Implemented testing tools.). Avaya IP phones and wireless devices in Perl using Cygwin.  Experience of L2/L3 (Ethernet. PIX firewall configuration and dual homed server setup KWANGNET.  Experience of using network monitoring and analysis tools to debug Ethernet/IP layer problems. Citrix Administration Tools. architected software/hardware products.. EIGRP.) to receive funding from VCs. Linux/UNIX/Windows operating systems. INC. Inc.0. San Jose.Nov. REDMEDIC. 2006 QA Consultant  Tested LE-OS 4. using WatchGuard System Manager.  Tested Citrix and Safenet SSL VPN clients co-existence. CA Nov. test plans to achieve Common Criteria certification of WatchGuard products for DoD. SNMP. Citrix Broadcast Server. Cryptography.. Perl World Wide Packets. San Jose. and developed IDS signatures for Symantec ManHunt  Cisco Catalyst 6513s in a redundant configuration. a smart card business for healthcare (REDMedic.

CCAST.0 to ATS-EASY. SAN.4. provided network security in LAN/WAN. and prepared CCIE. wrote ENA VPDN Feature Test Plan Document. and designed.. converted existing ENA cHDLC test script from ATS 3. IOS/ENA-WAN Connectivity Group  GSR/ENA Project – For White Box Testing. attended IETF. used some tools such as CodeTest. Routing Protocols. FlexeLint. Component Testing Framework (CTF). implemented. San Jose. NAS. Cflow/ENA to get code coverage. Ctrace. CA 1998 - 2001 Senior Software Engineer. Server and Storage Load Balancing. INC. as a Project Lead. ported ATM drivers for SCO UNIX. implemented functionality/stress testing tools in C and shell script to test boot/change management utilities. Implemented testing tools and tested Wincom Switching Server (Content Delivery. SSL. resulting in the development of Testing Application Software in C for ATM and cHDLC components under CTF. used Gdb. Source Navigator. resulting in the development of device driver for TMS380C27 comprocessor board in Network Encryption Unit. implemented the Internet firewall device driver under Solaris 2. CA 1995 - 1998 Network Analyst  Supported Lannet and Madge products. CA 1994 - 1995 Network Architect  As a Project Lead. Perl. CISCO SYSTEMS. resulting in the development of Tcl Automation Script for ENA/ATM on GSR such as OAM-PVC/ILMI-PVC/VC-CLASS/PVCD under ATS-EASY environment.  GSR/ENA Project – For Black Box Testing. San Jose.  HFR/Distributed ENA Project – Reviewed HFR Hardware/Software Architecture. UNIVERSITY OF CALIFORNIA. SYSDB TCL Extensions. Santa Clara. and built my own ATM Router to manage Ethernet/Token Ring ELAN/IP over ATM. SANTA CRUZ EXTENSION 1999 - 2002 Instructor  "TCP/IP Protocol Architecture" – covering TCP/IP/IPv6. 1993 - 1995 Consultant  Designed. Web Firewall Functions) in C. filed DDTS (Bug Report). and modified performance tools for the Transport Independent Interface (TII) client and endpoint for the new AppleTalk protocol architecture under MPW C++. Cscope. MADGE NETWORKS. Source Navigator to trace source code. SEMAPHORE COMMUNICATION CORP. established familiarity with ENA Component Development. analyzed Cisco Test Tools such as SYSDBCON.  Designed. INC. CSCCON. HTTP Tunneling. and MPLS. attended Cisco training classes. Shell under Linux.. completed automation of all test cases called out in the Test Plan. implemented stress test shell scripts for testing UNIX drivers. Cflow/IOS. BALLISTA. APPLE COMPUTER and 3COM CORP. .

VoIP. Ltd. Watching movies. Agile Training PROFESSIONAL PUBLICATION "Why do we have problems designing and implementing with Military Standard . Java Programming.11b and Other Protocols. Internet and E-Commerce Security...Internet Protocol (MIL-STD-1777) ?" (IEEE PCCC-86. Test Methodologies. KAIST. Traveling. Korea 1977 MS – Mathematics UNIVERSITY OF MICHIGAN. DAVID Systems. The Wollongong Group. Computer. Chinese (r/w. Arix Corporation. Korea Institute For Defense Analyses. and work as a Research Scientist/Educator at University of California. CATM. University of Michigan. ACRC. ICRC. Clearcase. ATM. Chungbuk National Univ.Lannet and Madge Products Training from Madge-U. Seoul National Univ. Learning) HOBBIES Violin. Hands- On VPN Design and Implementation (Grade A). Teaching. Berkeley Extension. Dong-Eui Univ.Dual majors in Mathematics and Computer Engineering PROFESSIONAL DEVELOPMENT TRAINING CLASSES: SunNet Manager. CIT. Internet Security: Advanced Topics. POSIX Threads Programming. Hebrew (r/w. Web. CISSP Review Sessions..ADDITIONAL EXPERIENCE 1980 - 1993  Includes work as a Senior Software Engineer with Extreme Networks. Become an Entrepreneur: Start Your Own Business. Eastern Michigan University. Conference Proceedings). Computer Engineering Courses from Stanford University thru SITN. Cryptography. Chinese. RAVE Programming. BGP (Grade A). Microkernel System Architecture. Wireless Security: 802. Seoul. Cello. MI 1980 MS .. Fujitsu. High Quality Software Engineering. Ford Motor Company. Cisco IOS Memory Troubleshooting. IMCR. E- Commerce Security: Firewall and Access Controls. LANGUAGES English (r/w/s).K. Cisco Internal Networkers Conference. Reading the Bible. Building & Debugging Cisco IOS Images. EDUCATION SEOUL NATIONAL UNIVERSITY. Bowling. CVOICE. GSR 12000 Series Technical Product Training. Invited from KIST. Getting Stated with IOS/ENA Programming. Japanese (r/w/s. Golf. IOS/ENA Architecture. IOS Device Drivers. French (r). Smart Card. Korea Information Assurance Society for seminars. HFR. Michigan Technical Institute. CMTD. Test Technology Boot Camp. MPLS Technology Essentials. Samsung Electronics Co.. Understanding QoS in IP.. Intrusion Detection. Korean (r/w/s). and Madge-Israel. German (r/w). Camping. Korea Univ. Inc. Drawing. Inc. and Frame Relay. Learning). Piano.. ETRI. Internet Cryptography. RSA Conference. Vitalink Communications Corp. Overview of Cisco Products. Informix Software. IOS Architecture. IXIA training. Listening to music. Business and Professional Writing. BCRAN. DDTS. CID. Wireless Security Forum. Advanced ENS training. Learning Foreign Languages. Ungermann-Bass. ExtremeWare CLI Switch Layer 2/Layer 3 Management & Configuration. Stanford Computer Forum (Security Workshop). Learning). Photography. Ann Arbor. Internet Systems Corp. Japanese. Sentriant AG/NG training. MCNS. .

Archery. CITIZEN . Provided "FREE INTENSIVE SAT I MATH class at New Vision Church" on every Saturday since June. 2015. Japanese Calligraphy (sho). I’ve been chosen to be an Extreme Star. Guitar. Cooking. Hand Acupuncture. Web Design. Dancing. Swimming. Harmonica.S. I have a photographic memory. etc. Pool.Singing. A tutor for CALCULUS BC. NSA SECURITY CLEARANCE IN 2009 U. I have an IQ of 162. Fishing.