Management Team
The GCT executive team consists of the following members:


Dr. Kyeongho "K.H." Lee President & CEO, Chairman of the BOD
Mr. John Schlaefer Chief Operating Officer
Mr. Ron Wilderink VP, Finance & Administration and CFO
Mr. Alex Sum VP, Marketing
Mr. Tony Bozzini VP, Worldwide Sales
Dr. Joonbae "J.B." Park VP, Engineering/Analog
Dr. Suwon "Steve" Kang VP, Engineering/Communication
Dr. Jeongmin "Jeemee" Kim VP, Engineering/Digital
Dr. Sukkyun "Albert" Hong VP, Engineering/PEG
Mr. Jeff Lee VP, Production Technology
Mr. Jason Lee VP, Corporate Development
Mr. Jongdo "J.D." Yoon VP, System Operations
The Management Team of GCT Semiconductor
Dr. Kyeongho "K.H." Lee
President & CEO / Chairman of the BOD
Kyeongho Lee is the driving force behind the operations and engineering innovations that give GCT its competitive advantage in the wireless industry, including their mobile handset and wireless multimedia SOC. "K.H." is credited with the successful fundraising efforts at GCT, which to date have secured more than $73.4 million over four rounds. In addition, Dr. Lee has served as GCT's Chief Technical Officer since 1999 and became President and Chief Executive Officer in 2001. As president, he is responsible for ensuring the strategic direction of the company, business development and the seamless day-to-day operations across the three companies in the U.S. and Asia that together make up GCT Semiconductor.

"K.H." holds 17 separate U.S. patents relating to GCT's direct conversion architecture and RF technology. Dr. Lee has authorship credits on eleven separate white papers or presentations dealing with communications semiconductor design, and was the winner of the Distinguished Dissertation award in 2000 from Seoul National University -- a tribute to his leadership in the wireless industry.

Prior to founding GCT Semiconductor, Dr. Lee worked at Silicon Image where he created and patented the architecture behind Silicon Image's PanelLink flat panel display technology, which became a worldwide standard. K.H. holds a Ph.D. in Electrical Engineering from Seoul National University.
Mr. John Schlaefer
Chief Operating Officer
As Chief Operating Officer, Mr. Schlaefer heads all sales, marketing, program management and production operations at GCT. Based in the San Jose, California, office, Mr. Schlaefer offers a strong background in the wireless semiconductor industry, including extensive experience in marketing, business development and operations. He is responsible for the management of daily operations as well as sales and marketing for the company.
Mr. Schlaefer joins us after working for twelve years with National Semiconductor Corporation. From 2001 to 2005, Mr. Schlaefer lead National's RF Products Group as Product Line Director with P&L responsibilities for National's industry leading PLL family - including the industry's first monolithic PLL + VCO product family - and PHS radio products.
Previously, Mr. Schlaefer held development and project engineering roles, including program management, at Watkins-Johnson Company in San Jose and Scotts Valley, California, where his responsibilities included the development and production of advanced antenna systems and missile components.
Mr. Schlaefer holds BSEE and MSEE degrees from Stanford University and an MBA from the University of California at Berkeley.
Mr. Ron Wilderink
Vice President of Finance & Administration and Chief Financial Officer
Mr. Wilderink leads the finance and administrative functions at
GCT. He is responsible for management of the financial, planning,
legal and other administrative activities for the company.
From 1998 to 2002, he was Vice President of Finance and Chief
Financial Officer of Conductus, Inc., a manufacturer of filter
and amplifier systems for the wireless communications market.
Previously, Mr. Wilderink was Vice President and Corporate
Controller of Oak Technology, Inc., a fabless semiconductor
company providing solutions to the optical storage, digital
imaging and digital home entertainment markets. His prior
experience includes various finance positions with Bell
Microproducts, VMX, Inc. and KPMG Peat Marwick, LLP. Mr.
Wilderink holds a B.S. degree in Accounting from San Jose State
University and is a Certified Public Accountant.
Mr. Alex Sum
Vice President, Marketing
Mr. Sum leads the product marketing and program management functions at GCT. He is responsible for directing the product definition and marketing research efforts, and setting corporate business objectives and "time to market" goals.
Prior to GCT, Mr. Sum was a product marketing manager at Philips Semiconductor with the global responsibility for managing the successful launch of sigma delta synthesizers, as well as CDMA and TDMA RF products. Before joining Philips, Mr.Sum served as a product/test engineering manager at Supertex and Fairchild Semiconductors. Mr.Sum has various experiences in start-up, growth and mature businesses. He has a BS degree in Electrical Engineering from San Jose State University.
Mr. Tony Bozzini
Vice President, Worldwide Sales
Mr. Bozzini leads worldwide sales efforts at GCT Semiconductor. He joined GCT with nearly 30 years experience in management, marketing and sales for semiconductor and systems companies.
Prior to joining GCT, Mr. Bozzini served as vice president of worldwide marketing and sales at FyreStorm, a fabless semiconductor company that provides digital power management ICs to manufacturers of portable devices, where he built a strong marketing, applications, and sales staff, and where he was instrumental in raising funding for Series B and C.
Mr. Bozzini was also involved in the founding of I-Control (now Atrua), one of the first companies to develop a fingerprint swipe sensor for biometric identification applications.
Prior, Mr. Bozzini served as vice president of sales at Veridicom. Mr. Bozzini also achieved record sales growth while working at Cirrus Logic as vice president of corporate sales and operations.
He also held management positions for Fujitsu Microelectronics' Advanced Products Division (USA), Signetics (now Philips Semiconductor), and he was the founding vice president of marketing for the SPARC International consortium. Mr. Bozzini holds a B.S. degree from Santa Clara University.
Dr. Joonbae "J.B." Park
Vice President, Engineering/ Analog
As head of GCT's Analog division, Dr. Park is focused on developing products that leverage GCT's industry-leading direct conversion architecture for mobile handsets. Dr. Park is focused on developing products that leverage GCT's industry-leading direct conversion architecture. Dr. Park is credited with developing the "timing ruler" concept for the frequency acquisition of the clock recovery circuit, which has been implemented into GCT's PLL product line. Dr. Park holds a Ph.D. degree in Electrical Engineering from Seoul National University, and has authored numerous articles in electrical engineering journals and major semiconductor conferences. In addition, he has been recognized on several occasions for his semiconductor design expertise, most notably in 1994 when he received the Gold Medal in Semiconductor Design by the Federation of Korean Industries.
Dr. Suwon "Steve" Kang
Vice President, Engineering/Communication
Dr. Kang is leading the development of GCT's communications products including Bluetooth, PLL and WLAN focused on RF systems and baseband modem. He brings to GCT more than 10 years of experience dedicated to the development of wired and wireless communication systems like CDMA handset transceivers, V.34 dial-up modem, HDTV transceiver and Bluetooth, etc. He received his Ph. D degree from the Seoul National University with specialty in cellular mobile communications. He holds 4 patents in the field of wireless communication systems.
Dr. Jeongmin "Jeemee" Kim
Vice President, Engineering/ Digital
As a VP, Dr. Kim is focused on developing wireless multimedia SOC based on Bluetooth or Wireless LAN and associated embedded cores for GCT Semiconductor, as well as overseeing the company's mobile media processor initiative. Dr. Kim brings a great deal of experience to the position, with more than nine years of service with Samsung Electronics and Korea Telecom working on multimedia semiconductor design.

During his doctorate program at Seoul National University, Dr. Kim studied the design and development of semiconductor circuits and systems, including an embedded DSP core, MPEG 2/4 coder-decoder, and low-power mobile media processor. He also was involved in developing embedded system software, including a simulator and compiler. "Jeemee" has been credited with authoring a number of articles for leading engineering journals in the U.S. and Korea.
Dr. Sukkyun "Albert" Hong
Vice President, Engineering / PEG

Dr. Hong is an expert in wireless communication systems, in particular, physical layer such as RF sub-systems and baseband modem. As head of GCT's principal engineering group, he is leading development of cellular RF sub-systems in GSM, PHS, WCDMA, CDMA, and next generation RF sub-systems of WiBro, and TD-CDMA. In addition, he is engaged in wireless multimedia systems such as Bluetooth and WLAN. He has more than 10 years of experience on physical layer development of wired and wireless systems. After joining GCT, Dr. Hong was leading development of high data rate QAM/OFDM modems and communication systems. He is credited with developing various "fractionally-spaced receiver architectures."

Dr. Hong holds a Ph.D. degree in Electrical Engineering from Seoul National University with specialty in modem designs.

Mr. Jeff Lee
Vice President, Production Technology
Mr. Jeff Lee leads the Production Technology division at GCT. He is responsible for directing process, device, assembly, testing, QRA and product engineering for the company, as well as overseeing customer service. Prior to joining GCT, he was a process and field service director at ASM Korea where he managed new process technology transfer and support such as Plasma CVD, EPI, Thin film, Diffusion, High-k HSG and SiGe process. Before joining ASM, he served as a process and device engineering manager and production engineering manager at Daewoo Semiconductor. Mr. Jeff Lee offers over 20 years of experience working in the field of semiconductor manufacturing including a strong background in customer support. He holds a B.S. degree in Material Engineering from Korea University.
Mr. Jason Lee
Vice President, Corporate Development
As Vice President of Corporate Development, Mr. Lee plays a key role in pursuing strategic partnerships and formulating new businesses for GCT Semiconductor. He is responsible for identifying and analyzing strategic initiatives including IP licensing and acquisitions, as well as recommending optimal business models to support the company¡¯s strategic direction. Based in the San Jose, CA, office, Mr. Lee offers a strong background in the wireless semiconductor industry, including extensive experience in executing joint development, marketing collaboration, and IP licensing arrangements with leading semiconductor companies.

Mr. Lee joined GCT in 2001 after working for Gartner Group in San Jose as a Senior Consultant where he evaluated technology companies for venture capital firms and investment banks; and assisted technology companies with expanding their customer-base as well as exploring new markets. He also consulted numerous institutions, including Korean securities industries, regarding BPR and other IT initiatives. Prior, Mr. Lee worked as a Web Strategy Practice Leader for the west coast, where he created and marketed new web strategy practice. He also served as a member of the technical staff at AT&T in Newark, NJ, where he played a key role in developing AT&T¡¯s proprietary ERP applications.

Mr. Lee holds an MBA from Yale School of Management, as well as a Bachelor¡¯s Degree in computer science from Brown University. He also pursued advanced studies in computer science from Stevens Institute of Technology.
Mr. Jongdo "J.D." Yoon
Vice President, System Operations
Mr. Yoon has over 20 years of experience in the electronics and semiconductor industries. He was a representative of Silicon Image in Korea who managed production and business development. Mr. Yoon holds a BSEE from Seoul National University.
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