Silicon Labs Management


Tyson Tuttle

Chief Executive Officer

Tyson Tuttle, Silicon Labs CEOMr. Tuttle joined Silicon Labs in 1997 and helped design the company’s first product, a silicon DAA, that subsequently achieved market share leadership in PC modems and allowed the company to go public in 2000. Mr. Tuttle led the marketing effort behind the company’s first RF transceiver products for mobile handsets. He also spearheaded the development and market penetration strategy of the company’s successful radio and TV tuner ICs, creating the broadcast business that today represents about one third of the company. Mr. Tuttle led the broadcast product lines until 2010 when the R&D team was consolidated under his leadership as chief technology officer. He then took over as chief operating officer in 2011 and was responsible for managing all of the company’s business units and R&D. He became the CEO in 2012. Prior to joining Silicon Labs, Mr. Tuttle held senior design engineering positions at Crystal Semiconductor/Cirrus Logic and Broadcom Corporation. Mr. Tuttle holds an M.S. in electrical engineering from UCLA and a B.S. in electrical engineering from Johns Hopkins University. He has 70 patents issued or pending in the areas of RF and mixed-signal IC design.

Bill Bock


Bill Bock - Director and Chief Financial OfficerMr. Bock is Silicon Lab’s President and Board Director. He began his association with Silicon Labs by joining the Board of Directors in 2000. Mr. Bock then served as Chief Financial Officer from 2006 until stepping down in 2011. He returned to Silicon Labs in 2013, assuming his present position mid-year. Mr. Bock participated in the venture capital industry, principally as a partner with CenterPoint Ventures, from 2001-2006. Before his venture career, Mr. Bock held senior executive positions with three venture-back companies: Dazel Corporation, Tivoli Systems and Convex Computer Corporation. He began his career with Texas Instruments. Mr. Bock holds a BS in Computer Science from Iowa State University and an MS in Industrial Administration from Carnegie Mellon University.

Geir Førre

Senior Vice President and Chief Strategy Officer

Geir Førre, Silicon Labs SVP and GMMr. Førre is the Senior Vice President and Chief Strategy Officer for Silicon Labs, responsible for driving the company’s product and market strategies in the Internet of Things, Internet Infrastructure and Industrial segments. Mr. Førre joined Silicon Labs in July 2013 as Senior Vice President and General Manager of Microcontroller and Wireless Products following the company’s acquisition of Energy Micro. Mr. Førre founded Energy Micro in 2007 and helped spearhead the development and market introduction of the world’s most energy-friendly MCUs, the EFM32 Gecko MCU portfolio. Mr. Førre has more than 20 years of semiconductor industry experience spanning research, development, marketing and management. Prior to founding Energy Micro, he was a co-founder of Chipcon, serving as its President and CEO from Chipcon’s beginning in 1996 until August 2007. Mr. Førre led Chipcon’s development from its inception as a design house to becoming the market leader in low-power RF solutions a decade later. He holds an M.S. in electrical engineering from the Norwegian University of Science and Technology, commonly known as NTNU, in Trondheim, Norway.

John Hollister

Chief Financial Officer

John Hollister, Silicon Labs CFOMr. Hollister joined Silicon Labs in 2004 as financial planning and analysis manager and was promoted to director of finance, worldwide operations in 2005. In 2007, Mr. Hollister took over as managing director of Asia operations and was ultimately promoted to vice president of manufacturing and Asia operations where he served until 2012, when he relocated back to the US and became vice president of business development. Mr. Hollister’s 20 years of professional experience include vice president of finance at Cicada Semiconductor, a private company, and various finance positions at Cirrus Logic, Veritas DGC, 3-D Geophysical and PricewaterhouseCoopers LLC. Mr. Hollister is a CPA and has a Masters in Accounting and a bachelor’s degree in Business Administration from the University of Texas at Austin.

Michele Grieshaber

Chief Marketing Officer

Michele GrieshaberMichele Grieshaber joined Silicon Labs in April 2014 as Chief Marketing Officer (CMO), driving the company’s marketing strategies and overseeing marketing and corporate communications programs including digital and content marketing, lead generation, event marketing, media and analyst relations, social media and corporate branding. Previously she was the Vice President of Demand Programs at IBM North America where she drove over $20 billion in marketing-generated sales pipeline annually and led a team of 200 marketing professionals and agency partners. A 20-year IBM veteran, Ms. Grieshaber also served as Vice President of Marketing for IBM’s Global Financing unit. During her IBM tenure, she has held strategic positions in software, hardware and services businesses including positions based in Europe. Ms. Grieshaber has a PhD in mechanical engineering from Virginia Polytechnic Institute and was a Fulbright scholar to France in 1988. She is an adjunct professor teaching Global Business Ethics at St. Edward’s University in Austin, Texas, and a guest lecturer at The University of Texas McComb’s School of Business on a variety of marketing topics.  

Alessandro Piovaccari

Senior Vice President and Chief Technology Officer

Alessandro PiovaccariAs Silicon Labs’ Chief Technology Officer, Dr. Alessandro Piovaccari is responsible for the company’s product and technology research and development. Dr. Piovaccari joined Silicon Labs in 2003 to design the company’s single-chip FM radio products, which have surpassed 1.2 billion device shipments. He co-architected Silicon Labs’ single-chip TV tuner IC, used by nine of the world’s top 10 TV makers, with more than 50 percent market share. Previously, Dr. Piovaccari worked as a research scientist at Tanner Research, joining the company in 1997 to develop CMOS image sensors. From 1998 to 2003, he was a member of the design services team at Cadence Design Systems, focusing on CMOS RFICs and high-speed SerDes IP development. Dr. Piovaccari holds 38 patents (30 currently issued). He is a Senior Member of IEEE and a Full Member of AES. Dr. Piovaccari received Laurea and Ph.D. degrees in electronic engineering and computer science from the University of Bologna in Italy and a Post-Master's Certificate with Honors in electrical engineering from Johns Hopkins University.

James Stansberry

Senior Vice President and General Manager, Internet of Things Products

James StansberryJames Stansberry is the Senior Vice President and General Manager of Silicon Labs’ Internet of Things (IoT) products, which includes the company’s energy-friendly microcontroller, wireless connectivity, and automotive and consumer receiver portfolios. Previously, he served as Vice President and General Manager of Silicon Labs’ Broadcast products, responsible for the company’s worldwide broadcast audio and video businesses. Under Mr. Stansberry’s leadership in Broadcast, Silicon Labs has become the No. 1 supplier of silicon tuners to the global TV market. Mr. Stansberry joined Silicon Labs in 2009 from Sony Corporation where he served in a variety of management roles in corporate strategy, R&D and semiconductor products. Previously he held business management and engineering positions with Motorola’s semiconductor product sector in several product groups focusing on the computing, consumer and game console markets. Mr. Stansberry holds a bachelor’s of science degree in electrical engineering from the University of Minnesota and a master’s of science degree in electrical engineering from National Technological University in mixed-signal communication ICs.

Mark Thompson

Senior Vice President and General Manager, Timing Products

Michele GrieshaberMark Thompson serves as Senior Vice President of Silicon Labs’ Timing products, which include high-performance clock generators, jitter attenuators, buffers and oscillators. Previously, he served as Vice President of Analog, Power and Sensor (APS) products at Silicon Labs. Mr. Thompson joined Silicon Labs in 2000 as a product manager for the company’s silicon direct access arrangement (DAA) product family and has served in a variety of roles in multiple business units including marketing director, general manager and vice president. Prior to Silicon Labs, Mr. Thompson held various engineering and marketing positions at BMC Software and Motorola's semiconductor products sector (now Freescale Semiconductor). Mr. Thompson holds a master's degree in electrical engineering, a master's degree in business administration and a bachelor's degree in electrical and computer engineering from The University of Texas at Austin.

Sandeep Kumar

Senior Vice President of Worldwide Operations

Sandeep KumarDr. Kumar joined Silicon Labs in 2006 and is responsible for U.S.-based product and test engineering, quality, failure analysis, and foundry/device and assembly engineering, as well as the prototype production test labs. Prior to joining Silicon Labs, Dr. Kumar managed global test engineering teams and was responsible for all product and test engineering for a $650 million business at Agere/Bell Labs. As a member of the Bell Labs technical staff, Dr. Kumar also was a member of the group that designed ISDN U-interface chips, Speaker Phone Codec and Sigma-Delta A/D converters. Dr. Kumar has a B.T. in Electrical Engineering from the Indian Institute of Technology, a M.S. in Electrical Engineering from the University of Evansville in Indiana and a Ph.D. in Electrical Engineering from Lehigh University.

Kurt Hoff

Senior Vice President of Worldwide Sales

Kurt HoffMr. Hoff joined Silicon Laboratories in 2005 and served as the company’s Vice President of European sales and operations where he was instrumental in establishing a presence at key European accounts and in developing a distribution channel for the company’s expanding, broad-based business. In 2007, Mr. Hoff took over responsibility for the worldwide sales team. Prior to joining Silicon Laboratories, Mr. Hoff served as President, Chief Executive Officer and Director of Cognio, a spectrum management company. Mr. Hoff previously managed sales and operations for C-Port Corporation, a network processor company acquired by Motorola. Additionally, Mr. Hoff held various positions at AMD. Mr. Hoff holds a B.S. degree in physics from the University of Illinois and an M.B.A. from the University of Chicago.

Lyn Herr

Vice President of Human Resources

Lyn HerrMs. Herr joined Silicon Labs in 1998 and pioneered the company’s Human Resources department. She was instrumental in creating the company’s HR infrastructure, including global compensation and benefits programs, performance appraisal systems and employee development initiatives. During her tenure at Silicon Labs, Ms. Herr has held various positions in finance and human resources, including Director of Global Compensation and Benefits and Senior Director of Global Human Resources. Ms. Herr holds a BA in History from the University of Wisconsin, Eau Claire and an MA in History from Texas State University.