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About Us: Executive Profiles

The success of a great company is rooted in strong leadership.

Pointe Scientific is guided by a dynamic executive team that carries on its strong management tradition by continuing to lead one of the foremost clinical diagnostics manufacturing companies in the world.

Our executives champion every aspect of Pointe Scientific's business from strategic direction, operations, design and development, regulatory compliance, financial management and capital investment.

As we look ahead, Pointe Scientific's bright future of growth and customer satisfaction could not be possible without the guidance of these seasoned industry professionals.

We are proud of our leadership and are excited to share their history and experience with you.

Randy Daniel -

Executive Chairman


Randy Daniel is currently an Operating Partner with Enhanced Equity Funds. In August 2012, he was named the Executive Chairman of MedTest Holdings, Inc., which includes the companies MedTest DX and Pointe Scientific. He has been actively engaged in the global clinical diagnostics industry for over 35 years.

Professional History

Mr. Daniel previously served as Executive Vice President, Global Customer Management of Siemens Healthcare Diagnostics 2008 to 2011. Prior to Siemens Healthcare Diagnostics, Randy was President of Global Customer Management for Dade Behring Inc. In these roles Mr. Daniel was responsible for Global Sales, Service, Customer Operations and Commercial Marketing organizations.

In 1982, Mr. Daniel joined American Hospital Supply and has held numerous executive positions in sales, marketing, and service for American Scientific Products, Baxter and Dade Behring.  In 2001, he was appointed President, North America Sales and Service for Dade Behring and then President, Americas Customer Management in 2003. He became President, Global Customer Management in January 2007.

Industry Leadership

Randy Daniel is a member of the American Society of Clinical Pathology for Medical Technology and IMD Alumni Association.


Randy holds a Bachelor of Science degree in Microbiology from Texas Tech University.

Wayne Brinster -

Chief Executive Officer


Wayne Brinster was appointed Chief Executive Officer in September of 2017.  Wayne’s proven track record includes successful revitalization of organizations.

Professional History

Most recently, Wayne was President and CEO of Wheaton Industries, a well-known supplier in the IVD and Life Science marketplace.  He re-engineered the organization to become more commercially focused while increasing the company’s presence on social media. The company’s revenue growth outperformed the industry average under Wayne’s leadership.

Prior to Wheaton, Wayne spend 31 years at Becton Dickinson.  His most recent position was division lead of BD’s Women’s Health and Cancer Diagnostic group.  While at BD, Wayne held successful positions in sales, marketing, program management, business development, strategy and general management. Wayne has also had experience as Committee Chair, The Clinical Laboratory Standards Institute – elected to the Board of Directors and Secretary of the Board to serve on the Executive Committee, and served on the Government Affairs Committee, LPA Trade Association.


Wayne completed his undergraduate work at the University of Miami and has taken graduate level classes at Miami, Nova Southeastern, Fairleigh Dickinson and Harvard.

Maricel Roberts -

Vice President, Operations and Solutions Development


Maricel Roberts joined MedTest in February of 2015 as Vice President of Process and Solutions Development. Ms. Roberts brings a distinct set of industry perspectives to our global growth strategies, and a proven ability to elevate corporate performance by managing and optimizing our business processes. As part of the MedTest leadership team, Maricel will work collaboratively with all department heads to deliver integrated solutions that will provide increased business value to MedTest customers. An innovative and transformative leader, Ms. Roberts has consistently demonstrated exceptional results and will provide leadership to all departments in becoming more efficient, more effective, and more capable of change in an ever-changing industry.

Maricel brings to MedTest over 25 years of direct experience in the healthcare industry. Her core areas of expertise include critical care nursing management in university and integrated health system networks, and lean based consultative workflow assessments in the clinical diagnostics industry (reference laboratories to multiple inpatient/ outpatient hospital settings). Maricel’s significant experience also includes change management facilitation within business processes, along with implementation of customer specific initiatives.

Professional History

Ms. Roberts spent 10 years of her career with Siemens Healthcare Diagnostics as the Senior Director of North American Healthcare Solutions. Responsibilities included overseeing end-to-end workflow processes between healthcare solutions, customers, and sales and technical teams. From 2000 through 2005, Maricel was the Manager of Healthcare Solutions at Dade Behring. One of her key focuses in this role was to provide customers within the laboratory a quantified understanding of how new technology would impact their existing processes and future state workflow design. Another focus was providing customers with a quantified understanding of key patient care product lines within the hospital setting.

Industry Leadership

  • Registered Nurse
  • Lean Healthcare Certification, University of Michigan, College of Engineering / Integrative Systems & Design


Maricel holds a Bachelor of Science Degree in Nursing from Capital University in Columbus, Ohio.

Ronald Jamison -

Vice President, Director of Technical Operations


Mr. Jamison is responsible for the technical operations required to support the technical design, development, direction, service, support, production, and performance of Pointe Scientific’s products and services. Together with the Vice President of Operations, Mr. Jamison develops policies that meet the company's planning and formulating goals and objectives. The superior performance of Pointe Scientific's products and services, from development to final use, is the direct result of Mr. Jamison's vision and leadership.

Professional History

Mr. Jamison has been with Pointe Scientific since 1991, most recently as Vice President and Director of Technical Operations since 2010, and previously as the QA/Technical Service Manager. Prior to joining Pointe Scientific, Ron served for 11 years as Lead Chemistry Technologist for National Reference Laboratory.

Industry Leadership

Mr. Jamison is licensed and certified as, and is a member of the:

  • American Society for Clinical Pathology
  • Health Education and Welfare
  • Medical Technologist

He has authored or co-authored the following abstracts:

  • Determination of HDL using a Modified Dextran Sulfate-Magnesium Precipitate, Clinical Chemistry, Vol. 38, No. 6, July 1992
  • Development of a Total Bilirubin Method free of Organic Solvents, Clinical Chemistry, Vol. 38, No. 6,1992
  • Determination of Bicarbonate by an enzymatic method using Phosphoenolpyrate Carboxylase for a recombinant microbial source, Clinical Chemistry, Vol. 38, No. 6, 1992
  • Evaluation of an Automated Methodology for the Determination of HDL Cholesterol in Serum, 1997
  • Development of a liquid stable chemistry reagent line for Hitachi analyzers, Clinical Chemistry, Vol. 48, No. 6, 2002

Debbie Whitehair, BS, MT (ASCP), SC -

Vice President, Marketing


Debbie Whitehair joined the MedTest family in March of 2013. As part of the MedTest leadership team, Debbie brings over 22 years of experience from many different areas of the clinical diagnostics industry. These areas include technical support, customer training, product management and marketing, strategic and value-based marketing, and clinical education.

Professional History

Ms. Whitehair previously served as the United States Director of Chemistry and Immunochemistry Marketing at Siemens Healthcare Diagnostics from 2007 until March of 2013. Her responsibilities at Siemens Healthcare Diagnostics included overseeing assay launch strategies, product marketing, and clinical scientific education. From 1991 through 2007, Debbie held various marketing positions at Dade Behring, concentrating on cardiovascular and renal diagnostics. Prior to her management positions, Debbie spent 10 years in the clinical laboratory, both in a teaching and community hospital setting.

Industry Leadership

Debbie is a licensed and board certified:

  • Medical Technologist
  • Specialist in Chemistry

And is a member of the:

  • American Society for Clinical Pathology
  • American Association for Clinical Chemsitry


Debbie holds a Bachelor of Science Degree in Medical Technology from Duquesne University, located in Pittsburgh, Pennsylvania.

Jeff Thomas -

Vice President, North American Sales


Jeff Thomas was appointed Vice President of North American Sales for MedTest in December of 2013. He was also charged with leading the National Direct Accounts Division and National Distributor Sales. Jeff is building and maintaining relationships with all of MedTest's largest National Direct and Distributor Accounts. He started with MedTest in June of 2013 as the Vice President of West Area Sales and National Direct Accounts. Mr. Thomas is responsible for ensuring that MedTest's customer facing sales and service professionals understand and communicate the unique value that MedTest brings to its customers and business partners.

Professional History

A 25 year veteran of the Laboratory Diagnostics Industry, Jeff previously served as Director of Global Account Management for Siemens Healthcare Diagnostics, and was responsible for global customer development and management for the clinical research market. Prior to Siemens acquiring Dade Behring, Mr. Thomas held numerous national leadership roles with Dade Behring focusing on new business development, team development, national and global market strategies, and national and global account management, with special emphasis on cardiovascular point of care technologies.


Jeff Thomas holds a Bachelor of Science Degree in Marketing/Management, with a Minor in Economics/Finance, from Union University located in Jackson, Tennessee.

Willie Retana -

Vice President, International and B2B Sales


Willie Retana came to MedTest with over 18 years of experience in the Global Medical Diagnostics industry. During these many years in the industry, Willie learned the art of developing and maintaining business relationships with customers around the world. He also fine-tuned his ability to carefully listen to and evaluate the needs of each individual prospect and customer - a critical skill in the international sales business, where every laboratory's need is unique and every medical diagnostic solution is different from the last.

Today, as Vice President of International Sales for MedTest, Mr. Retana is responsible for leading a single, integrated international sales organization across the company's businesses and international geographies, fostering all of MedTest's efforts abroad. He works with the company's business units like marketing, technical service, delivery, engineering, and other groups to drive sales of the full portfolio of MedTest services, products and solutions. Willie is also expanding MedTest's footprint overseas through his many contacts in the international community and creating strategic opportunities for business partners around the globe.

Professional History

Prior to joining MedTest, Mr. Retana was CEO and Country Division Lead for the Diagnostics Division of Siemens Healthcare in Central America and the Caribbean. At Siemens, Willie had direct P&L responsibilities for the countries in his region, and leading 26 team members in achieving financial and operational targets. He was also accountable for managing and supporting business partners in the Latin American region, contributing to increases in market presence and improving customer satisfaction. 

Mr. Retana’s many responsibilities in the past have included: developing pricing strategies, product management, mergers and acquisitions, due diligence processes, distribution channel rationalization and optimization.



Willie Retana has a Bachelor of Science Degree in Medical Technology from Florida International University in Miami, Florida. Mr. Retana is a licensed Medical Technologist in the State of Florida and a member of the American Society for Clinical Pathology (ASCP).