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Jeff leads the day-to-day operations and strategic vision of Brightstorm. Prior to co-founding Brightstorm, he was the regional vice president and later senior principal at Convergys Learning Solutions (formerly DigitalThink). Before joining Convergys, Jeff was a consultant at Mitchell Madison Group, an international strategic management consulting firm with about 1,000 consultants and offices throughout the United States and Europe. Jeff has also held the role of product development manager at LeapFrog, a leading educational company.

Jeff's passion for learning started when he was teaching humanities, math, English, and Spanish in public schools in California and Arizona. He helped start Serramonte High School in Daly City, Calif., where he designed and implemented an interdisciplinary, project-based curriculum with authentic assessments. Additionally, he was on the board of the Coalition of Essential Schools, a leading nationwide school reform non-profit, and most recently served as its president.

Jeff holds a Bachelor of Arts degree in English from Stanford University, a Master of Arts in teaching from Brown University, and an MBA from the Haas School of Business at the University of California, Berkeley. While at Haas, Jeff was president of his class and continues to serve on the development council, as well as acting as an occasional visiting lecturer for the "Speaking as a Leader" class.

Favorite high school teacher: "I had two favorite teachers in high school. Mr. Helgeson, my calculus teacher, wrote notes ambidextrously, and pushed us hard to succeed in front of everyone. If I was confused, he'd declare loudly, 'To the board, Mr. Marshall,' and he and the class would help me work out the problem. Mr. Adkins, my literature of fantasy teacher, encouraged us to 'break the rules' with our ideas, and stretched and provoked us with arguments like, 'Bilbo Baggins cheated in the riddle with Gollum.' Mr. Adkins taught me the delight of thinking in new ways."

Bumsoo Kim is responsible for managing Brightstorm's day-to-day business operations as well as business development and global business initiatives.

Prior to Brightstorm, Bumsoo was the principal at KTB Ventures, a Palo Alto, Calif.-based venture capital firm, where he focused on investments in wireless communications, consumer electronics, and Internet media and services.

Before joining KTB Ventures, he was responsible for international investments at KTBnetwork, the largest and oldest investment firm in Korea with more than $10 billion under management worldwide. During his time with KTBnetwork, Bumsoo made investments in companies focused primarily on global IT markets and disruptive technology. Bumsoo has a successful track record of customer engagements and business development in the IT business division of Samsung Corp. He brings unique industry insights to the Brightstorm team, leveraging his operating experience at Samsung and VC experience at KTB.

Bumsoo received his Bachelor of Science degree in electrical engineering from Yonsei University.

Favorite high school teacher: "Mr. Byung Seok Lee, my math teacher in high school. He solved math problems unlike any other teachers or books, focusing on efficient and easier-to-understand methods. He seemed to enjoy solving the problems, as opposed to just focusing on preparing us for tests. Until his class, math was not my favorite subject, and I often struggled with it. With Mr. Lee's help, I started actually enjoying math and ultimately decided to become an engineering major in college."

Sung Y. Yoon is the managing partner and CEO of KTB Ventures in Palo Alto, Calif., where he oversees investment operations in the United States. Since 1994, Sung has led KTB's investments in 44 U.S. companies including Xylan/Alcatel, Copper Mountain Networks, Berkana Wireless/Qualcomm and Bitfone/HP. He is active as a board member or a board observer of companies under KTB's current investment portfolio, including Beceem, Inphi, and Brightstorm.

Sung also is managing director of KTB Securities, a global private equity and investment banking firm supporting innovations and growth opportunities in Korea, the United States, China, Japan, and Southeast Asia.