Corporate Governance

Timothy (TJ) B. Johnson
President and Chief Executive Officer

Mr. Johnson has served as the company’s President and Chief Executive Officer and as a member of our board of directors since January 2008. Mr. Johnson joined us from LVC Consulting, a consulting company, where he was a partner from April 2007 to January 2008. Prior to April 2007, Mr. Johnson spent five years in leadership roles at Ventana Medical Systems, Inc. or Ventana, a medical diagnostics company, prior to its acquisition by Roche Holdings, Inc., or Roche. At Ventana, Mr. Johnson held the positions of Senior Vice President, Global Business Services, Senior Vice President, Corporate Development and Operations, and Vice President/General Manager, Operations and Lean Systems. In these roles, Mr. Johnson’s responsibilities included product technical support, worldwide marketing, corporate development, strategic planning and manufacturing. Prior to working at Ventana, Mr. Johnson had an 12 year career at Hillenbrand Industries, Inc., a global diversified industrial company, where he held several leadership roles in the corporate offices and in the Hill-Rom Division, including Vice President, Global Marketing, Vice President/General Manager, Hill-Rom AirShields, Vice President, Operations, and Vice President, Continuous Improvement and Strategic Planning. Mr. Johnson spent part of his early career at PricewaterhouseCoopers LLP, a public accounting firm. Mr. Johnson previously served on the board of directors of Kalypto Medical, Inc. and was the Industry co-chair for the Biosciences Leadership Council of Southern Arizona. He earned a B.S. in Business from Indiana University. Our board of directors believes that Mr. Johnson’s extensive executive background in general management, strategic planning and managing operations of a diagnostic company and service as our President and Chief Executive Officer qualify him to serve on our board of directors.
John L. Lubniewski
Chief Business Officer

Mr. Lubniewski has served as our Chief Business Officer since April 2011. Mr. Lubniewski joined us from Ventana, a medical diagnostics company and member of the Roche Group and global headquarters of Roche Tissue Diagnostics, or RTD, where he served in leadership roles for nine years both before and after the acquisition of Ventana by Roche in March 2008. From August 2010 to April 2011, Mr. Lubniewski was Senior Vice President and Lifecycle Leader, Advanced Staining Platforms at Ventana. From January 2008 to August 2010, Mr. Lubniewski served as Senior Vice President and Lifecycle Leader, Clinical Assays at RTD, with responsibility for three lifecycle teams, technical marketing and medical marketing and global accountability for all RTD clinical assay products. Prior to the Roche acquisition of Ventana, Mr. Lubniewski served at Ventana as Senior Vice President, Advanced Staining Business Unit, Vice President Worldwide Marketing and Translational Diagnostic Business Unit, and General Manager, Research Products. In these roles, Mr. Lubniewski was responsible for a variety of assay and platform development and commercialization efforts. Prior to Ventana, Mr. Lubniewski worked for over ten years at Corning, Inc., a manufacturing company, in a variety of divisional, sector and corporate sales and marketing roles. Mr. Lubniewski earned a B.S. in Chemical Engineering from Clarkson University.
Shaun D. McMeans
Vice President of Finance, Administration and Chief Financial Officer

Mr. McMeans has served as our Vice President of Finance & Administration and Chief Financial Officer since February 2012. Prior to joining us, Mr. McMeans was Vice President – Finance of Securaplane Technologies, Inc., a product supply company and division of Meggitt PLC, an aerospace, defense and energy conglomerate, from May 2011 to February 2012. Mr. McMeans was a financial consultant from February 2008 to April 2011, working both in an individual capacity and as a partner for Tatum LLC, a consulting company. Prior to February 2008, Mr. McMeans was Chief Financial Officer for The Long Companies, a full service residential and commercial real estate division of Berkshire Hathaway, Inc. Mr. McMeans also worked for over five years at LXU Healthcare, Inc., a manufacturer and distributor of specialty surgical equipment, as Controller and then Chief Financial and Operating Officer. In his early career, Mr. McMeans worked in roles of increasing responsibility, including Director of Finance, for Burnham Holdings, Inc., formerly Burnham Corporation, a manufacturer and distributor of residential and commercial hydronic heating equipment. Mr. McMeans received his B.S. in Accounting from The Pennsylvania State University.
Patrick (Pat) C. Roche, Ph.D.
Senior Vice President, Research and Development

Dr. Roche has served as our Senior Vice President for Research and Product Development since April 2014. Dr. Roche joined us from Ventana, a medical diagnostics company and member of the Roche Group and global headquarters of RTD, where he worked for 12 years and held a number of positions of increasing responsibility, including Vice President, Head Biomarker Strategy, Translational Diagnostics, from August 2009 to April 2014, and Vice President, Assay Development and Clinical Studies, from March 2007 to July 2009. In these roles, Dr. Roche was responsible for interfacing with pharmaceutical partners in their development of targeted cancer therapeutics and facilitating the transition of biomarkers into companion diagnostics and for leading reagent product development and launching over 30 in vitro diagnostic products, including the FDA-approved c-kit and HER2 tests. Prior to working at Ventana, Dr. Roche was at the Mayo Clinic Rochester, a medical research group, where he served as Director of the Immunohistochemistry Laboratory and as Associate Professor of Laboratory Medicine and Pathology. Dr. Roche has co-authored more than 125 peer-reviewed publications and is an inventor on a number of patent filings and two issued U.S. patents. Dr. Roche received a B.S. in Biological Sciences from the University of Southern California, and a Ph.D. in Experimental Pathology from the University of Southern California, School of Medicine.
Debra (Deb) A. Gordon, Ph.D., JD
Vice President, Chief Legal Counsel

Dr. Gordon has served as our Vice President and Chief Legal Counsel since June 2011. Prior to joining us, Dr. Gordon was General Counsel and Head, Patent Legal at Ventana, a medical diagnostics company and a member of the Roche Group and the global headquarters for RTD, from October 2008 to June 2011. Dr. Gordon was promoted to leadership of the Ventana legal function after serving at Ventana from February 2007 as a patent attorney supporting the assay development functions. For nearly ten years preceding Dr. Gordon’s in-house legal experiences, Dr. Gordon practiced as a business transactional attorney at the law firms Lewis and Roca LLP (now, Lewis Roca Rothgerber LLP) and Perkins Coie LLP, and as an intellectual property attorney at the law firm Klarquist Sparkman LLP. Prior to law school, Dr. Gordon completed post-doctoral fellowships at Brandeis University and the University of Arizona. Dr. Gordon is an author on 13 peer-reviewed scientific publications and an inventor on two patent filings and one issued U.S. patent. Dr. Gordon received a B.S. in Biology and Chemistry and a M.S. in Chemistry from Western Washington University, a Ph.D. in Physiology from the University of Arizona, College of Medicine, and a J.D. with honors from the University of Arizona, James E. Rogers College of Law.
Sam M. Rua, Jr.
Vice President of Regulatory Affairs and Quality Systems

Mr. Rua has served as our Vice President of Regulatory Affairs and Quality Systems since November 2011 and directs the quality systems organization as well as global regulatory and clinical affairs. Prior to joining us, Mr. Rua served in a variety of quality and regulatory roles with increasing responsibilities, most recently with Ventana, a medical diagnostics company and member of the Roche Group and global headquarters of RTD, where he successfully led initiatives for PMA approvals and clearances for multiple IVD and companion diagnostic tests. Mr. Rua also was the Vice President of Global Regulatory and Clinical Affairs at Beckman Coulter from 2007 - 2010, and Executive Director of Quality and Regulatory at Third Wave Technologies, Inc. (now Hologic) from 2004-2007. While at Third Wave, he led the regulatory and clinical strategies for the Invader® UGT1A1 test and the Invader® HPV test. Mr. Rua received a B.S. in microbiology from the University of Arizona.
David (Dave) M. Silverio
Vice President, Operations

Mr. Silverio has served as our Vice President, Operations since September, 2015. He is responsible for development and implementation of our manufacturing, supply chain, and facilities strategies. Prior to joining us, Mr. Silverio served as Director of Operational Excellence for two companies in the Meggitt PLC group of companies: Securaplane Technologies, Inc., or Securaplane, a supplier of avionics products, and OECO, LLC, a manufacturer of electromagnetic devices and power conversion products. From 2011 to 2014, he was the Vice President, Operations for Securaplane. Prior to the Meggitt PLC acquisition of Securaplane from the Danaher Corporation, or Danaher, in 2011, Mr. Silverio held roles of increasing responsibility in Danaher aerospace and industrial businesses, including Director of Operations, Business Unit Manager and Business System Leader. Earlier in his career, Mr. Silverio served various operational roles in divisions of Corning Incorporated, Honeywell International, Inc., and Norsk Hydro ASA. Mr. Silverio earned a B.S. in Mechanical Engineering from the Florida Institute of Technology.

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