System Architect: Provided technical direction for hard disk drive design and development. Specified system performance and feature requirements. Created hardware and firmware design specification for design engineers.Customer Lead: Acted as the main technical interface for enterprise customers. Presented technical information and explained detailed engineering implementation to customers.SOC: Acted as the main technical interface for SOC vendors. Prepared, reviewed and approved the SOC specifications. Coordinated regular meetings with vendors to track SOC delivery and to follow up on issues. SAS SSD: Supervised SAS SSD design and development. Hired a group of FW and HW engineers to design SAS SSD FW. Generated design specification and developed the SAS SSD FW. SED: Managed SED development project to produce the Opal SED. Tested the SSD with ISV and qualified the product for OEM customer. Managed the FIPS 140-2 Level-2 certification. Enterprise Storage: Directed enterprise FW development. Set up the enterprise lab to test the drives in the customer environment. Tested and qualified the 1TB, 2TB SATA HDD for major OEM customers.Standards: Managed company’s industry standard activities. Assigned engineers to attend various standard committees: SATA; T13, TCG, IEEE 1667, T10, IDEMA and other standard activities.

Led team in designing and debugging of firmware for 3.5 inch hard disk drives. Implemented Native Command Queuing (NCQ) and advanced SATA interface functions. Transferred HDD products to production line in Korea. Tested drives in the burn-in and final test processes. Evaluated parameters affecting yield and implemented firmware to improve yield in the production line.Managed SATA Phy and Link layer programming and testing. Verified OOB signal and handled the power management events.

Led a team of engineers on the creating architecture and implementing firmware for optical devices (CD-RW & DVD). Debugged the host interface and drive read/write function of the device.Implemented a commercial RTOS for the real-time FW task scheduling to control host command, buffer manager, and servo interface tasks.

Led the engineering team to architect, design, and test reference firmware for CD-ROM drives.Responsible for the optical controller validation. Designed and developed the hardware and firmware before the IC arrived. Performed system level validation for each functional block such as ATAPI, DRAM, and ECC. Tested the focus, tracking, sled servo, and low-level C1, C2 error correction.

Supervised firmware engineers in hard disk controller firmware design and development by defining the project requirement, schedule, architecture, and implementations. Directed engineers to design the firmware for ATA and SCSI hard disk drives. Oversaw writing of code and chip testing. Interfaced with customers to integrate disk controller to their platforms with the reference firmware. Designed multi-process firmware architecture for real time operation. Coded and debugged ATA and SCSI interface command executions. Defined, flowcharted, and designed the firmware for defect management, error recovery procedure, and read ahead cache.

Responsible for firmware design and development of the 20 and 40 Mbytes hard drive. Led firmware engineers to develop and test drive code for read/write/format, buffer manager, and track positioning. Granted a patent on the servo tracking.Worked as a project leader for the SCSI CD-ROM controller design. The team consisted of hardware, device driver, and firmware engineers. Design and debugged the code for the data transfer from disk to buffer to host SCSI interface. Wrote code for C3 layer ECC data corrections