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Corporate Officers

  • Luis A. Müller

    Chief Executive Officer, Board Member

    Luis A. Müller joined Cohu's Delta Design subsidiary in 2005 and has been President and Chief Executive Officer of Cohu, Inc. since December 2014. Dr. Müller was previously President of Cohu's Semiconductor Equipment Group (SEG) from January 2011 until being named CEO, Managing Director of SEG's Rasco GmbH business unit in Germany from January 2009 to December 2010, and Vice President of SEG's High Speed Pick-and-Place handler products from July 2008 to December 2010. Prior to joining Cohu, Inc. Dr. Müller spent nine years at Teradyne, where he held various management positions in engineering and business development.

    Dr. Müller holds a PhD in Mechanical Engineering from the Massachusetts Institute of Technology.

  • Jeffrey D. Jones

    Vice President Finance and Chief Financial Officer

    Jeffrey D. Jones joined Cohu’s Delta Design in July 2005 as Vice President Finance and Controller. In November 2007, Mr. Jones was named Vice President, Finance and Chief Financial Officer of Cohu. Prior to joining Delta Design, Mr. Jones, was a consultant and Vice President and General Manager of the Systems Group at SBS Technologies, Inc., a designer and manufacturer of embedded computer products. Prior to SBS Technologies, Mr. Jones was an Audit Manager for Coopers & Lybrand (now PricewaterhouseCoopers).

    Mr. Jones is a CPA and graduate of the University of Redlands.

  • Thomas D. Kampfer

    Vice President, Corporate Development, General Counsel and Secretary

    Thomas D. Kampfer joined Cohu in May 2017 as Vice President Corporate Development, General Counsel and Secretary. Mr. Kampfer most recently served from June 2015 to May 2017 as Executive Vice President and Chief Financial Officer of Multi-Fineline Electronix, Inc. Prior to that, Mr. Kampfer served from 2012 to 2015 as President of CohuHD, formerly a division of Cohu, which was divested in 2014. Previously, Mr. Kampfer spent eight years with Iomega Corporation, holding several executive positions, including President and Chief Operating Officer and Vice President, General Counsel and Secretary. Earlier, Mr. Kampfer served in various legal and business development executive roles with Proxima Corporation, and also held various positions in manufacturing engineering and legal at IBM.

    Mr. Kampfer has a B.S. in Industrial Engineering from Purdue University and a J.D. from the Georgetown University Law Center, and is admitted to the State Bars of California and New York.

  • Christopher G. Bohrson

    Vice President and General Manager, Digital Test Handlers

    Christopher Bohrson joined Cohu in May 2016 as Vice President Sales and Service, Americas. Since January 2017, he has served as Vice President and General Manager for Digital Test Handlers. Prior to joining Cohu, Mr. Bohrson held a several executive positions at Bosch Automotive Service Solutions/SPX over eleven years, lastly as Vice President and General Manager of the OEM Diagnostics and Information Solutions group. Prior to this, Mr. Bohrson spent twenty years working in variety of management and technical roles at Teradyne’s semiconductor and broadband test division in the US and Asia.

    Mr. Bohrson holds a Sc.B. in Materials Engineering from Brown University and a Master of Science in Management from the Massachusetts Institute of Technology’s Sloan School of Management.

  • Hock W. Chiang

    Vice President, Global Sales and Service

    Hock W. Chiang joined Cohu in October 2012 as Vice President, Global Sales & Service for Cohu’s Semiconductor Equipment Group. Prior to joining Cohu, Mr. Chiang served as a Director for AXElite Technology Corporation. From 1989 through 2011, Mr. Chiang held a variety of positions at Teradyne including Director – Asia SOC Marketing & New Business Development, Managing Director of Teradyne’s Singapore and China operations and Director of Worldwide Field Total Quality Management.

    Mr. Chiang holds a B.S. in Electrical Engineering from the University of Texas and a MBA, Sloan Fellow from the Massachusetts Institute of Technology’s Sloan School of Management.

  • Ian von Fellenberg

    Vice President and General Manager, Analog Test Handlers

    Ian von Fellenberg joined Cohu in 2013 with the acquisition of Ismeca by Cohu. He was Vice President and General Manager of the Ismeca Business Unit from 2013 until his appointment as Vice President and General Manager for Analog Test Handlers in January 2017. In 2004, he set up operations for Ismeca in China and managed both the North Asia and South Asia regions. Prior to Ismeca, Mr. Fellenberg spent six years at Orell Füssli Security Printing where he held several executive positions in the document security technology business. He has also held various positions in sales and product management for companies in the automation components (sensors, drives) industry.

    Mr. Fellenberg holds a Master of Robotics Engineering from the Swiss Federal School of Technology (ETH).