Management Team

Rainer Cholewa
President and CEO

Rainer joined SMI in October 2007 as president and CEO, after serving as senior consultant to ELMOS Semiconductor AG since December 2006.

Before joining SMI, he was managing director and member of the executive board at Carinthian Technology Research AG in Austria. He holds a degree in Technical Physics from the Technical University of Graz, where he worked one year at the Institute of Experimental Physics. His professional experience comes from managerial roles at Voest-Alpine AG in Linz, Austria, the Siemens electronic device production unit in Villach, Austria, and Siemens AG in Munich. He also managed the IBM and Siemens manufacturing joint venture in St. Denis, France. From 1997 to 1999 he led the contract negotiations between Siemens/Infineon and IBM, and was then appointed general manager of the Altis/SC joint venture in France.

Holger DoeringChief Operating Officer (COO)

Holger joined SMI in 2007 as a consultant in operations and took over the responsibility for production, process engineering, IT, materials management, equipment and facilities at the beginning of 2008.

He started at ELMOS in 1995 as a process engineer and by 1997 was production engineering manager. From 1999 he was responsible for Production, Process Engineering and Plasma-Module Equipment.

In 2003 he began the transfer for 0.8µm process from the 6-inch fab in Dortmund to the 8-inch line of the joint ELMOS/ Fraunhofer IMS fab in Duisburg and in 2005 managed the 8-inch production in Duisburg.

Holger holds a diploma in electrical engineering from the University of Dortmund (Germany) with a focus on semiconductor manufacturing. He thesis work was carried out at ELMOS in 1994 where he developed a CMOS-compatible process module to produce monolithic integrated piezoresistive pressure sensors for a European project. 

Friedrich HolzChief Financial Officer (CFO)

Friedrich Holz joined SMI in 2008 as Director of Finance. He directs the financial affairs of the organization, being responsible for the company’s financial plans and policies, its accounting practices, the conduct of its relationships with lending institutions, the financial community, and the preparation of financial reports. With a Bachelor’s Degree in Computer Science from the University of Applied Sciences in Furtwangen/Black Forest, Germany, Frieder has had over 12 years of financial experience with various organizations in both Controller and Finance Director roles.

Michael RenoVP, Sales and Marketing

Michael Reno joined SMI in September 2008. He was most recently Director of Sales, Asia Pacific and Western USA, at the Spectrum Plastics Division of the Barnes Group, Inc., a $1.4 billion international aerospace and industrial components manufacturer and distribution company.

Prior to the Barnes Group, Reno served in key sales management positions at Eaton’s Aeroquip Air Conditioning and Refrigerated Products Division, and Carlisle Food Service Products. He received his bachelor of science in business administration from Bowling Green State University.

Dr. Michael Doelle
Director, Business Development EMEA

Michael joined SMI in 2006. His current responsibilities are the design and test of MEMS-based pressure sensors.

Prior to joining SMI, he was a researcher at the Microsystems Materials Laboratory at IMTEK, Freiburg (Germany) where he graduated with a Ph.D., specializing in field effect transistor-based CMOS stress sensors. He is co-author of more than 20 scientific papers. He studied Microsystems Technology at the University of Freiburg, Germany, and received his engineering degree in 2002.

Marc Konradt
Director of Process, Product and Test Engineering

Marc joined SMI in 2006 as a Process Engineering Manager, after working for ELMOS Semiconductor AG since 2002. In 2009 he took over responsibility for product engineering as well. He holds a Diploma in Electrical Engineering from the University of Dortmund (Germany), with a focus on Semiconductor Manufacturing. During his studies he worked on a project to create optical switches using Si micromachining and on the development of sub 100nm transistor structures in a CMOS compatible process flow. His diploma thesis was entitled: "Introduction and improvement of new cleaning processes with ozone and spiked chemicals for the industrial semiconductor manufacturing."

Sandy Taylor
HR Manager

Sandy is responsible for leading SMI’s human resources efforts, including: compensation, benefits, staffing, employee relations, training, and compliance. Sandy has an extensive HR background that includes 18 years of previous experience in all facets of human resources. Sandy joined SMI in 2007.

Prior to assuming her current role, Sandy held leadership positions in various manufacturing, semiconductor, hard drive, and telecommunication companies. Her experience ranged from start-ups to Fortune 500 companies.

Sandy has an MBA from Golden Gate University and a Bachelor’s degree from Union University in Tennessee. She is an active member of numerous professional organizations, including: Society for Human Resources Management (SHRM), Women in Technology International (WITI), Northern California Human Resources Council (NCHRC), Peninsula Compensation Association (PCA), and Bay Area Human Resources Forum (BAHRF).

Dr. Steve Terry
Director of Technology

Steve joined Silicon Microstructures in 2002 and currently serves as the Director of Technology. He is leading a process development group with the goal of bringing new MEMS processes and designs to a wide variety of products for both SMI and its MEMS customers.

He received his B. S. degree in Electrical Engineering from the Massachusetts Institute of Technology in 1970 and M. S. E. E. and Ph. D. degrees from Stanford University in 1971 and 1975 respectively. At Stanford, his pioneering work in silicon micromachining was the integration of a gas chromatography system on a single wafer of silicon. After he left Stanford, Steve founded Microsensor Technology to commercialize the miniature gas chromatograph. He later joined IC Sensors as Director of R&D where he lead the expansion of the pressure sensor product line, and the successful design and development of MEMS devices including accelerometers for airbags and inertial guidance, miniature silicon valves, pressure sensor arrays, optical switches and fiber alignment chips, and strain gages.

Omar Abed
Director, R&D Engineering


Omar joined SMI in January of 2012 to oversee the research and development of MEMS products and technologies. Prior to joining SMI, Omar lead the development of next generation automotive passive safety MEMS inertial sensors at Analog Devices. In this role Omar also lead the formation of the product development process and played a pivitol role in creating the strategy for the division. Omar also worked as the lead designer of integrated MEMS capacitive pressure sensors at Schneider Electric including the development of an ultra-low power monolithic sensor for TPMS and low power medical applications.

Omar holds a Bachelor of Science degree in Electrical Engineering and Computer Science from the University of California at Berkeley where he conducted research in wireless sensor networks at the Berkeley Wireless Research Center. Omar holds a Master of Science in Electrical Engineering from the University of Southern California with an emphasis in analog and RF circuit design. Omar is also a Stanford Certified Project Manager.

Ron Morin Director of Quality