[4][5] He also was CEO of two Silicon Valley companies, Inphi Corporation and Oak Technology, and has been called "the best-connected chip executive in the semiconductor industry.

"[6] Sohn co-founded the Extreme Tech Challenge (XTC), one of the world’s largest global startup competitions, inspired by the United Nations' Sustainable Development Goals (SDGs).

Sohn graduated from the University of Pennsylvania with a BS in electrical engineering and received an MS from the MIT Sloan School of Management.

[9] Sohn was a chairman and chief executive officer at Oak Technology, a digital media semiconductor company.

[10] Sohn was the president of Agilent Technologies' semiconductor group, the launch of its spin-off entity, Avago as a senior advisor of Silver Lake.

[18][19] In 2014, Sohn, along with Bill Tai from Charles River Ventures, founded the Extreme Tech Challenge, or XTC, a nonprofit startup competition that aims to address United Nations' 17 Sustainable Development Goals.

[24] In 2017, Sohn launched the $300 million Samsung Automotive Innovation Fund, to focus on connected car investments.

[citation needed][31] He has also sat on the boards of ARM, Synnex Corporation, Cymer, Inc. Hyundai Electronics (now SK Hynix) and PLX Technology.