Silicon Labs Management
Chief Executive Officer
Mr. 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 President and 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.
Mr. Bock joined Silicon Labs’ board of directors in 2000 and was appointed CFO in 2006. He retired from Silicon Labs’ management team in 2011, returning as interim CFO in early 2013. Mr. Bock brings more than 30 years of experience spanning finance, operations and sales. Prior to joining Silicon Labs, he was president and chief executive officer of DAZEL Corporation. Prior to DAZEL, Mr. Bock served as executive vice president and chief operating officer of Tivoli Systems, CFO and senior vice president of sales of Convex Computer Corporation and spent nine years in various finance roles at Texas Instruments, including vice president and controller of TI’s data systems group. Mr. Bock holds a bachelor’s degree in Computer Science from Iowa State University and a master’s degree in Industrial Administration from Carnegie Mellon University.
Senior Vice President and Chief Strategy Officer
Mr. 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.
Chief Financial Officer
Mr. 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.
Chief Marketing Officer
Michele 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.
Senior Vice President and Chief Technology Officer
As 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.
Senior Vice President and General Manager, Internet of Things Products
James 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.
Senior Vice President and General Manager, Timing Products
Mark 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.
Senior Vice President and General Manager, Internet Infrastructure Products
Mr. Bresemann joined Silicon Labs in 1998 as the Director of Marketing and helped craft the company’s marketing strategy for its first Wireline products. Mr. Bresemann served as the Vice President and General Manager of Silicon Labs’ Wireline products from 2002 to 2009, and then as the Vice President and General Manager of Broadcast products until 2012 when he was appointed Senior Vice President and Chief Product Officer. In 2014, he became Senior Vice President and General Manager of Internet Infrastructure products, overseeing Silicon Labs’ timing, analog, power and sensor portfolios. Prior to Silicon Labs, Mr. Bresemann served as the Director of Marketing for Consumer and Professional Audio Products at Crystal Semiconductor/Cirrus Logic from 1992 to 1998. From 1988 to 1992, Mr. Bresemann held various sales positions for Analog Devices, a designer and manufacturer of integrated circuits. Mr. Bresemann holds a B.S. in electrical engineering from the University of Arizona.
Senior Vice President of Worldwide Operations
Dr. 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.
Senior Vice President of Worldwide Sales
Mr. 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.
Vice President of Human Resources
Ms. 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.