SUMMARY

• Embedded Software/Firmware engineer of real - time projects:
• GBE Network Device Drivers
• Cryptographic Engine (IPsec/IKE)
• Network Clock Synchronization (ACR & DCR)
• DWDM/EPON Gbe, RODAM, and SONET/STM Transport systems,

PROFESSIONAL EXPERIENCE

Confidential, CA

Embedded Engineer/Contract

Responsibilities:

• Designed and demonstrated TDM-over-IP and Serial Nx64K traffic bundling
• Circuit Emulation Service (CESoPSN) with time slot grooming and cross-connect
• Synchroniztion with Adaptive and Differential Clock Recovery (ACR & DCR)
• Tail Defect signaling (3-bit coding) and OAM: Connectivity and Performance
• Developed and supported Google Fiber project/Linux ARM, GIT tooling,
• GBE Packet Generator full rate Gbe tester, DMA, PHY, UDP and MAC devices
• Optical Network Unit (ONU) DWDM module device (I2c), ONU EPON & GBE device drivers, and several fileSystem applicatons
• WLAN setupBox uboot diagnosis, PCIe-WIFI (802.11ac and 802.11n)

Confidential

Security Integration Engineer

Responsibilities:

• Developed Cryptographic Security (ARM9 & ARM7 Linux/threadX)
• Cryptographic Library: Hardware Random Number Generator (RNG)
• Linux shell scripts, Burn-In-Test program for cryptographic module
• Tested mobile server-devices (MDM), Winphone, for supporting VoIP and security over VPN, interoperating with SIP & Key Management servers
• VoIP call signaling on DTLS SIP-SDP implementation
• Media traffic channel: SRTP-AEAD/Suite-B implementation
• Certificate and Key Management: PKI X.509 Compliance
• Developed automated test and performed Pre-Integration Verification(PIV) with Android’s Compatibility Test Suite(CTS)
• Built Android-system loads with Security Framework/(ASF) GIT application package, integrated with McAfee Mobile Security (MMS) for Android phones and tablets,

Confidential

Cryptographic Principal Engineer

Responsibilities:

• Ported and developed IEEE 802.11 WiFi (WLAN over ARM9 with Linux/debian POSIX Pthread)
• network IP-Gateway configuration (DHCP & Static), DNS(open-DNS) services
• Wireless device, RaLink/RT3070, IP and Gateway configuration,
• multi-processes and threading multi-sockets TCP/IP networking programming
• Developed Airborne/Avionic Systems, DO-178B, to meet Command & Control with I/O message processing at highest assurance and verification (SVP/DOORS)
• SDS designed and developing Linux/LynxOS C++ SNMPv3 Client session process (SCS), embedded PowerPC-405, OOD/UML, and applied the USM security model to interoperate with the Joint Tactical Radio System (JTRS)
• SDS developed secured IPsec ESP tunneling between Client and gateway-Server; PPC-405, GreenHills MULTI OS, and BSP/Device Drivers; C++ and C
• IKE SA INIT exchange and IKEv2 Key Exchange (IKE/DH Group) payload

Confidential

Communications Embedded Principal Engineer

Responsibilities:

• Developed embedded software, GreenHills (GHS)/MULTI-ADA PC-405 and ARM9, to support IP Security products (HAIPEI-1.3.5)
• developed IPv4 with ICMP and IGMP with Router Discovery and Neighbor Discovery protocols, using GreenHills-Interpeak stack package.
• Developed HAIPE Inter-Operabilty Test (HIT) scripts to configure IPsec device to facilitate IP Security (IPsec ESP Tunnel) HAIPE conformance verification
• designed and developed IPsec Security Policy (SPD), Association (SAD), and Link Mapping table between black (Cipher Text) and red (Plain Text) gateways
• Designed and developed radio platform to support public safety hand-held radios
• developed GreenHills/Integrity PXA320/Xscale IO Device Drivers, Interrupt Driver Tasks, DSP TMS5510 Host Port Interface (HPI), Audio CODEC, Actionable Switch-Buttons, DMA traffic paths, and Power-Saving feature
• designed P25 CAI configuration and Trunking supports and design
• ported Linux boot software, modified and added new devices, interrupts, DMA, I2C, and MMU, to support PXA270/Xscale
• Designed and developed Media Signaling Gateway L2-Switching module and GbE
• PPC405 BSP/VxWorks-WindRiver, Data flow control, and device drivers
• Lead the Platform team to develop PPC405 VxWorks BSP/Kernel for high-level application software interface and to manage Functional test program to facilitate manufacture process and diagnose modules for quality assurance

Confidential

Principal Lead Engineer

Responsibilities:

• Lead, designed, and developed very high-speed digital transmission links and Optical channel adaptation technology for DWDM/CWDM/ROADM systems
• GbE interface, RMON feature, flow control, service provisioning and recovery
• MAC Link, Auto-Negotiation, Flow Control, RMON
• SONET/SDH OC192 and OC48 with Packet-Over-SONET interface modules
• Optical channel adaptation, OTU2/K2, OTU1/K1, Forward Error Correction (FEC) scheme at synchronous and asynchronous modes, and Surveillance SMON
• MC860 (32-bit CPU) device drivers, VxWorks BSP and Kernel

Confidential

Responsibilities:

• Lead a platform team and developed MC680x0 Administration Shelf, Matrix Shelf, and optical Link cards, with constructed Admin--Control Link (HDLC) among racks for system provisioning and autonomous event reporting
• Successfully completed RTOS transition from pSOS to VxWorks, used by all Cross-connect transport systems
• Lead and developed SONET/SDH Automatic Protection Swiching (APS) project to maintain highest service quality
• Developed high-speed links OC48/12/3 & STS-1, SDH/STM-1, and T3/T1 interface with various VT mapping schemes, and SONET/SDH Performance Monitoring, Alarm Surveillance, Maintenance Signals, and System Clock redundancy