Leadership Team

Samuel Cho

Co-Founder, CTO, RFHIC HQ

Samuel Cho

Co-Founder, CTO, RFHIC HQ

Dr. Samuel Cho is the co-founder and chief technology officer of RFHIC Corporation, responsible for leading RFHIC's R&D department for wireless infrastructure, defense & aerospace, and RF energy applications.

Founded Radio Frequency Hybrid Integrated Circuits (RFHIC) in August 1999, starting with an incurable need for cost-effective GaAs components for satellite applications within South Korea. As Co-Founder and CTO he led RFHIC's pioneering movement towards gallium nitride (GaN) on silicon carbide (SiC) technology for commercial telecommunication, defense & aerospace, and ISM applications.

Cho has over 40 years of RF & Microwave expertise in gallium nitride (GaN) technology. As Co-founder and Chief Technology Officer of RFHIC, Dr. Cho focuses on pioneering breakthrough semiconductor technology for next-generation commercial RF & Microwave applications.

He holds a bachelor's degree in electrical engineering from Kwangwoon University, a master's degree, and Ph.D degree in electrical engineering from Yonsei University.

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David Cho

Co-Founder, CEO, RFHIC HQ

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David Cho

Co-Founder, CEO, RFHIC HQ

David Cho is the co-founder and chief executive officer of RFHIC Corporation, responsible for leading the world's first and only one-stop GaN solution company of 300+ employees and $100 million in annual sales.

He oversees the company's three business units, as well as its functions for finance, operations, quality, supply chain, human resources, engineering, and manufacturing. Cho brings a broad range of experience in business management, strategy, and finance. During his 20+ years, he led RFHIC's IPO for the Korean stock exchange (KOSDAQ) in 2017, as well as the company's acquisition of RFMTL in 2019.

Cho holds a bachelor's degree in finance from Suny Polytechnic Institute.

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In Yong Song

GM of Manufacturing , RFHIC HQ

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In Yong Song

GM of Manufacturing , RFHIC HQ

In Yong Song is the general manager of Manufacturing at RFHIC Corporation. He oversees the company’s manufacturing division for PA modules, T/R modules, and MW Generator systems for domestic and overseas markets.

Song joined RFHIC in 2000 as an R&D engineer for localized RF components in cellular 3g mobile communications. As head of R&D for the telecommunications division, he led the development and commercialization of gallium nitride (GaN) transistors and power amplifier modules for Samsung’s 3G and 4G markets. He also played a vital role in registering RFHIC as a certified vendor for Samsung Electronics.

Song brings a broad range of expertise and know-how for RF & Microwave components, strengthening the strategic direction of the company’s wireless infrastructure business through diverse innovative solutions.

Song received a bachelor's degree in electronic engineering from Kyeonggi University in 1998.

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Dong Sub Park

GM of RF Energy Division, RFHIC HQ

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Dong Sub Park

GM of RF Energy Division, RFHIC HQ

Dong Sub Park is the General Manager of Engineering of the RF Energy division. He oversees the RF Energy business and its technology and engineering functions. He is responsible for developing next-generation high-powered microwave generator products for industrial, scientific, and medical applications.

Park joined RFHIC in 1999 as an R&D engineer and served in multiple engineering positions before becoming the general manager of manufacturing in 2011. In 2021 he was appointed as the GM of Engineering for the RF Energy division. Park brings a broad range of semiconductor manufacturing, R&D, and strategy expertise. With over 27 years of experience and expertise, he drives the growth of RFHIC’s RF energy business by developing innovative GaN RF & MW solutions.

Park holds a bachelor's degree in mechatronic engineering from Daedeok University in South Korea.

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Stella Bae

CEO, RFHIC US Corporation

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Stella Bae

CEO, RFHIC US Corporation

Stella Bae is the chief executive officer of RFHIC US Corporation, an independent subsidiary of RFHIC Corporation. RFHIC US was founded to support ITAR-related customers and applications and various other applications. She oversees the US firm’s overall operations.

Bae has over 30 years of experience and brings a broad range of expertise in business management, strategy, supply chain, and administration. From the beginning of the company in 1999, she worked in the US as a liaison office officer and supported the needs between the headquarter and customers in the US.

In 2007, she established RFHIC US in Cary, North Carolina. In 2011, she led the firm’s facility expansion in Morrisville, NC, and incorporated the official US Corporation in Morrisville, NC.

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Sam Kim

GM/ VP , RFHIC US Corporation

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Sam Kim

GM/ VP , RFHIC US Corporation

Sam Kim is the general manager and vice president of RFHIC US Corporation, an independent subsidiary of RFHIC Corporation. RFHIC US was founded to support ITAR-related customers/applications and various other applications. He oversees the company’s three business units, as well as its function for technology, engineering, global sales, and operations.

Sam brings a broad range of experience in business management, sales, strategy, and engineering. Since joining RFHIC in 2009, Sam has played a pivotal role in expanding the company’s defense & aerospace business which strengthened RFHIC US’s position within the global cellular and radar markets. Under his leadership, RFHIC US successfully incorporated GaN RF & Microwave solutions for various applications in defense, aerospace, wireless infrastructure, and more. He treasures the trust he gains from his customers and partners.

Before joining RFHIC, he held key managerial and technical positions at Alcatel-Lucent from 2000 to 2007 respectively.

Sam holds a mechanical engineering degree from Penn State University, a master's degree (Sponsored by Lucent) in technical management/systems engineering from Johns Hopkins University, and an MBA from Duke University.

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Younggeun Kim

Director of Manufacturing, RFHIC HQ

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Younggeun Kim

Director of Manufacturing, RFHIC HQ

Younggeun Kim is the Director of Manufacturing at RFHIC Corporation. He joined RFHIC in July 2000 as Manager of the Operations Team. Since 2000 he spearheaded the innovation of our manufacturing line to greatly strengthen transistor assembly operation efficiency and maximize technology competitiveness. He has also played a crucial role in training our manufacturing staff to build and improve skills throughout the operational process.

He oversees the transistor and hybrid assembly and test manufacturing division, ensuring that production, performance, and quality standards are consistently met. Kim has a long history in the semiconductor industry, having spent 23 years in various operation and manufacturing sectors.

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Tom Kim

CFO/ Director of Administration, RFHIC HQ

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Tom Kim

CFO/ Director of Administration, RFHIC HQ

Tom Kim is the chief financial officer of RFHIC Corporation. He oversees the company's financial reporting and controls, planning and analysis, investor relations, internal audit, tax, and administrative personnel. He also oversees all financial reporting for RFHIC's subsidiary RFMTL.

Kim joined RFHIC in 2006 and served as the financial manager, finance controller, and financial administrator before being appointed CFO in 2017. He also played a key role in the company's IPO in 2017, as well as the company's acquisition of RFMTL in 2019.

He holds a bachelor's degree in economics from Sogang University in South Korea.

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Hyunchul Kang

Director of Engineering & Sales for Domestic Defense Division , RFHIC HQ

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Hyunchul Kang

Director of Engineering & Sales for Domestic Defense Division , RFHIC HQ

Hyunchul Kang is the Director of Engineering & Sales for Domestic Defense at RFHIC Corporation. He oversees the Domestic Defense business and has been responsible for driving the growth of RFHIC’s domestic Radar, Milcom, and Electronic Warfare sectors through developing diverse, innovative GaN solutions.

Kang joined RFHIC Corporation in 2000 as an R&D engineer and served in multiple leadership positions within the Engineering department. In 2017, he was appointed director of engineering and sales and led the division’s expansion for the Radar, Milcom, and Electronic Warfare markets.

Kang brings broad expertise and experience in business management, engineering, and strategy.

Kang holds a bachelor's degree in electrical engineering from Kyonggi University in South Korea and is working towards a master's degree in defense technology management from Kwangwoon University.

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June Sik Kwak

Director of Engineering for Advanced GaN Solutions , RFHIC HQ

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June Sik Kwak

Director of Engineering for Advanced GaN Solutions , RFHIC HQ

Dr. June Sik Kwak is the director of engineering for Advanced GaN solutions at RFHIC Corporation. He oversees the development of RF devices and fabrication processes.

Dr. Kwak brings a broad range of experience in semiconductor devices and materials, playing a vital role in developing the company’s next-generation products like GaN on Diamond transistors. Since joining RFHIC in 2021, he has led the development of cutting-edge RF gallium nitride (GaN) devices and fabrication processes, as well as the development and evaluation process of the foundry facility.

Before RFHIC, he focused on disruptive technology development and management for the AlGaN-based DUV emitter as R&D director at Seoul Viosys Inc. from 2019 to 2021.

He was the principal researcher and group leader for the development of high-power GaN devices at Seoul Semiconductor Inc. from 2011 to 2019.

Dr. Kwak received his Ph.D. degree in solid-state and semiconductors physics from Hanyang University in South Korea 2010.

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Wireless Infrastructure

RF Energy

Defense & Aerospace

Company

Samuel Cho

David Cho

In Yong Song

Dong Sub Park

Stella Bae

Sam Kim

Younggeun Kim

Tom Kim

Hyunchul Kang

June Sik Kwak