Leadership Team

Our management team and Board of Directors have been carefully selected to provide the best combination of scientific expertise and business acumen.

AATI Scientist


Steven J. Lasky, Ph.D., Chief Executive Officer

Dr. Lasky has served as a Director of AATI since 1997 and CEO since 2002. Prior to becoming CEO Dr. Lasky served as VP of Research & Development and VP of Sales & Marketing. Dr. Lasky has 19 years of management experience, which began at the Union Carbide Technical Center in 1990, where he managed the Process Spectroscopy Center and the Robotics Center, and was a key player in the corporate-wide SAP LIMS installation. Special recognition awards were bestowed five times for visionary concepts and successful implementation of new technology. Dr. Lasky received his B.S. degree in Chemistry from Western Illinois University in 1986 and Ph.D. in Analytical Chemistry from the University of Wyoming in 1990. Publications include the Journal of Physical Chemistry and the Journal of the American Chemical Society.

Brian J. Thompson, Chief Financial Officer

Mr. Thompson joined AATI in December 2012 and has over 21 years of executive-level corporate leadership, financial, operational and merger and acquisition experience. Prior to AATI (2006-2012) Mr. Thompson was SVP of Equity Dynamics, a venture capital company owned by John Pappajohn. In his role as SVP, Mr. Thompson evaluated investment opportunities, negotiated investment transactions, raised capital for new ventures and conducted management team guidance through various board and board observer positions. Prior to this, Mr. Thompson was the CFO and CAO for Kum & Go, LC, a regional convenience store chain. During his three-year tenure (2003 to 2006), KG revenue grew from $600M to $1.3B through an organic and acquisitions based model. Prior to KG (2000 to 2003) Mr. Thompson was the President and CFO of Astracon, Inc. of Denver, CO until negotiating the company’s sale in 2003. From 1995 to 2000, Mr. Thompson was a Partner and CFO of the Edgewater Private Equity Funds ($300M in capital), where he completed numerous transactions. After receiving his BS/BA in accounting from the University of South Dakota in 1991, Mr. Thompson spent four years in the audit department of KPMG, LLP in San Antonio and Des Moines.

Pierre Varineau, Ph.D, Chief Technical Officer

Dr. Varineau has over 24 years of experience with management, new product design, and implementation, beginning with the development of Chemical Sensors in Los Alamos (1989-1991), and continuing with the new product development & commercialization group at Dow Chemical (1991-2009). Pierre joined AATI in 2009. He is an expert in bringing new products and technologies to market. He was responsible for the implementation of multiple product lines within Dow Chemical as well as the Fragment Analyzer™ within AATI. Dr. Varineau's key focus at Advanced Analytical is the identification, development and commercialization of new technologies. Dr. Varineau is also a certified patent agent and coordinates the company’s complex patent portfolio. Pierre received his Ph.D. in Chemistry from the University of Wyoming in 1989, has 16 publications and 6 patents.

Steve Siembieda, Vice President of Commercialization

Mr. Siembieda has been with Advanced Analytical since 2007, with a primary focus on supporting sales and marketing efforts. Key accomplishments include defining, writing and promoting the strategic initiatives and business plan for the Fragment Analyzer, establishing and defining marketing efforts within the company and advancing sales of the Fragment Analyzer throughout the world. Prior to this, Mr. Siembieda worked at Kemin Industries (Des Moines, IA) for 8 years, holding several executive positions including Marketing Director for the Petfood division and Assistant Director of Business Development. Before moving to Iowa, Mr. Siembieda was employed for 9 years at a clinical hospital (St. Paul, MN) where he established and managed a Molecular Diagnostic Laboratory to train physicians and aid in clinical diagnosis of patient samples. Mr. Siembieda attained his BA in Biology from Saint Mary’s University (Winona, MN) and holds graduate degrees in Molecular Biology (MS, University of North Dakota) and Business Administration (MBA, Drake University). His accomplishments include being an invited speaker, author of several articles and graduate of leadership programs.

Jeremy R. Kenseth, Ph.D., Vice President

Dr. Kenseth is Vice President at Advanced Analytical and has over 15 years experience in basic research, and application and product development. Prior to joining AATI he was Laboratory Manager and an Application Scientist at CombiSep, Inc.

Dr. Kenseth received his B.S. degree in Chemistry from the University of Wisconsin-La Crosse (Biology minor) and a Ph.D. in Analytical Chemistry from Iowa State University, where his research focused on the development of novel immunosensor platforms. He holds one patent and has co-authored several review articles. Publications include the Journal of Pharmaceutical Sciences, Analytical Chemistry, and Journal of American Chemical Society.

Board of Directors

John Pappajohn

Mr. Pappajohn has served as a director since 2004. Since 1969, Mr. Pappajohn has been the President and principal stockholder of Equity Dynamics, Inc., a financial consulting firm, and the sole owner of Pappajohn Capital Resources, a venture capital firm, both located in Des Moines, Iowa. He also serves as a director for American Caresource Holdings, Inc. and CNS Response, Inc. From 2007 to 2009, Mr. Pappajohn served as a director for SpectraScience, Inc. From 1995 to 2010, he served as a director of Careguide, Inc., which was a public company through January 2009. Mr. Pappajohn received his B.S.C. from the University of Iowa.

Fredric Orkin

Mr. Orkin has served as a director since July 1999. Since 1992, he has been President of Fredric I. Orkin and Associates Inc., an engineering consulting firm specializing in product development and evaluation services for medical devices, and President of Czarnek & Orkin Laboratories, Inc., an applied physics laboratory specializing in measurement techniques for industrial applications. From 1985 to 1991, he was Vice President and General Manager of a division of Baxter International, Inc. that developed, patented and obtained FDA approval of a product that automated the delivery and charting of multiple intravenous fluids. He previously held positions with several companies in the areas of quality assurance and engineering. He received a Bachelor of Industrial Engineering degree from Ohio State University in 1957 and holds four US patents.

Daniel Buttry, Ph.D.

Professor Buttry earned a B.A. with highest distinction in chemistry, magna cum laude, in 1979 at the University of Colorado in Colorado Springs. He subsequently attended the California Institute of Technology in Pasadena, receiving a Ph.D. degree in Electrochemistry in 1983. After graduating, he accepted a position as a Member of the Research Staff at IBM’s San Jose Research Lab (now the Almaden Research Lab). In 1985, he moved to the University of Wyoming as an assistant professor, where his research effort was initially focused on applications of the quartz crystal microbalance in electrochemistry, thin film materials and chemical sensor research and development. He became a professor in 1992 and served as head of the department from 1999–2002. In 2008, he moved to the Department of Chemistry & Biochemistry at Arizona State University as a professor of chemistry, and became chair in 2012. Dr. Buttry has over 100 publications in the areas of advanced instrumentation, chemical sensors and environmental measurements, and 12 US patents. He is a reviewer for many technical journals and several private and government funding agencies, including the National Science Foundation and National Institutes of Health. His research group has been supported by many agencies and companies, including the W. M. Keck Foundation, the National Science Foundation, the Office of Naval Research, the Air Force Office of Scientific Research, the Army Research Office and the Department of Energy, including ARPA-E.

Brian Joe Baker

Mr. Baker joined as a director of the company in 2016 after having been a shareholder of AATI since the acquisition of CombiSep in 2006. Mr. Baker has been the President of the Baker Family Foundation for over twenty years focusing on investing in early stage companies, managing real estate holdings and serving on the boards of several charitable organizations. Mr. Baker is currently a member of the ISU Foundation Board of Governors and the Baker Council – ISU Agronomy Department. Mr. Baker received his Bachelors degree from Pepperdine University in 1980 and his Master's from Georgetown in 1983.