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Officers and Senior Management
Raul Carreras
President
Raul Carreras has a career spanning over 25 years as a global leader in complex international environments across the medical device, healthcare technology, and automotive sectors. His extensive background includes executive roles at Confluent Medical Technologies, Terumo Cardiovascular, and Medline Industries, where he led major initiatives resulting in significant growth, operational excellence, and performance improvements in supply chain and global operations.
Earlier in his career, he held several Engineering and Manufacturing leadership positions at Michelin in both Europe and North America (Canada and the U.S.), ultimately advancing to Worldwide Vice President of Manufacturing. Raul’s educational background includes executive programs at Harvard Business School, Stanford Graduate School of Business, Ashridge University (UK), and HEC Paris, as well as a Master’s degree in Electrical and Electronics Engineering from Universidad Pontificia Comillas.
Beyond his professional achievements, Raul is actively involved in supporting his community as a board member for nonprofit organizations including United Way, Greenville Symphony, South Carolina Ballet, and the Chamber of Commerce. He also serves as a volunteer firefighter and has been recognized on multiple occasions for his community service by members of the U.S. Congress and U.S. Senate, as well as by two governors as an “Ambassador for South Carolina.” Raul is particularly proud to have received the “Firefighter of the Year” award in Greenville County.
Corey Eckhoff
Sr. Vice President Global Sales & Marketing
Corey Eckhoff is a seasoned professional with over two decades of experience in the healthcare, respiratory diagnostics, and medical device industry. Before his current role, he served as Sales Director for the West Region at MGC Diagnostics, where he further developed his expertise in sales leadership, strategic growth, and customer relationship management within the cardiorespiratory diagnostics market.
Corey’s extensive background includes key roles at Vyaire Medical (formerly CareFusion and VIASYS Healthcare), where he contributed to business development and sales strategy for pulmonary and respiratory care solutions. He also gained valuable experience at Velocity Sports Performance. His career began in athletics as a relief pitcher for the Fargo-Moorhead RedHawks, an experience that instilled the discipline, resilience, and team-oriented mindset he applies to leadership today.
Corey holds a master’s degree from the University of Wisconsin–La Crosse and a bachelor’s degree from North Dakota State University, where he also played collegiate baseball.
James McGurran
Sr. Vice President Global R&D, QA/RA
James McGurran is a seasoned professional with a 15-year tenure at MGC Diagnostics, where he has continually advanced through leadership roles while contributing to innovation in medical device technology and product development. Starting as a Hardware Engineer, he quickly progressed to the role of Program Manager, overseeing the successful coordination and execution of new product introductions for respiratory and cardiorespiratory diagnostic solutions.
In 2015, James was appointed Product Development Director, responsible for leading both the Hardware and Software Engineering teams while spearheading all product development initiatives. Since 2020, he has led the global Engineering and Quality Assurance/Regulatory Affairs teams, supporting the development, quality, and regulatory compliance of MGC Diagnostics’ healthcare technology and pulmonary function testing solutions.
James earned a Master of Business Administration from the Carlson School of Management at the University of Minnesota with an emphasis in Corporate Finance and Medical Industry Leadership. He also holds a bachelor’s degree with honors in Biomedical Engineering from the University of Iowa College of Engineering.
Michael Heino
Vice President Global Service & Support
Michael Heino, Vice President of Global Service and Support for MGC Diagnostics, is a seasoned professional in healthcare technology and medical device service with a career spanning more than three decades. His journey began with a strong technical foundation, earning an Electronics Certification from Lake Superior College and a Certificate of Biomedical Technology (CBET) from Hibbing Technical College.
In April 1991, Michael joined MGC Diagnostics, then known as MedGraphics, as a Field Service Technician, traveling extensively throughout the United States and internationally to support and enhance respiratory and pulmonary diagnostic systems. In 1995, he advanced to the role of Technical Support Specialist, beginning a progression through multiple domestic and international service leadership positions.
Michael became Service Director in 2010 and was appointed Vice President of Global Service and Support in 2020. In his current role, he oversees global service and support operations for MGC Diagnostics, helping ensure high quality standards, operational excellence, and exceptional customer support for healthcare providers worldwide.
Brian Dumke
Vice President Global Operations
Brian Dumke serves as Vice President of Operations at MGC Diagnostics. He brings more than 25 years of operational leadership experience across the medical device, healthcare technology, and manufacturing industries. Prior to joining MGC Diagnostics, Brian served as Vice President of Operations at Anteris Technologies and previously held senior leadership roles at Aeriax, Abbott, and St. Jude Medical, leading operational strategy, manufacturing, and process improvement initiatives.
Brian holds both a Bachelor of Science in Industrial Technology and a Master of Science in Management Technology from the University of Wisconsin–Stout.
Outside of work, Brian enjoys spending time with family, embracing classic Minnesota activities, and pursuing hands-on hobbies focused on creating and building.
Darren Drumsta
Vice President Global Product Management and Marketing
Darren Drumsta has been an integral part of the MGC Diagnostics team for nearly 16 years. He initially joined the company as a Technical Support Specialist before transitioning to the Product Management team after just one year. In 2009, Darren’s dedication and expertise led to his promotion to Associate Product Manager, where he focused primarily on the GX (gas exchange) product line and respiratory diagnostic technologies.
Over the following years, Darren progressed through multiple leadership roles within Product Management, ultimately advancing to Director and then Vice President overseeing Global Product Management and Marketing. Throughout his tenure, Darren has played a key role in expanding the company’s portfolio of pulmonary and cardiorespiratory diagnostic solutions through innovative product development, strategic partnerships, and mergers and acquisitions.
Darren is a graduate of The College of St. Scholastica in Duluth, Minnesota, where he earned both bachelor’s and master’s degrees in Exercise Physiology.
The Scientific Advisors
Charles Irvin, PhD
Charles Irvin, PhD, serves as a Scientific Advisor to MGC Diagnostics and is Professor of Medicine in Pulmonary Medicine within the Department of Medicine at the Vermont Lung Center at the University of Vermont. He also serves as Associate Chair for Research Affairs in the Department of Medicine and Assistant Dean for Faculty for the College of Medicine, a role he assumed in 2012.
Dr. Irvin received his PhD in Pulmonary Physiology from the University of Wisconsin in 1978 and completed a National Institutes of Health postdoctoral fellowship at McGill University in Montreal from 1978 to 1980. He is a member of both the European Respiratory Society (ERS) and the American Thoracic Society (ATS), where he has also served on the Board of Directors. In 2014, he was named an inaugural fellow of the European Respiratory Society.
Throughout his career, Dr. Irvin has served on numerous grant review panels for organizations including the National Institutes of Health, American Heart Association, and American Lung Association. He has maintained continuous NIH funding since 1976 and currently serves as Principal Investigator for a T32 training grant. Dr. Irvin has trained 19 postdoctoral fellows and mentored numerous junior faculty members who have gone on to successful research careers in pulmonary medicine and respiratory science.
Dr. Irvin’s research focuses on understanding the mechanisms of airway dysfunction in patients with asthma and advancing pulmonary and respiratory health research.
Bruce Johnson, PhD
Bruce Johnson, PhD, serves as a Scientific Advisor to MGC Diagnostics and is Professor of Medicine, Physiology, and Biomedical Engineering at Mayo Clinic. He also serves as a Consultant in Cardiovascular Diseases, Preventive Medicine, Occupational Medicine, and Aerospace Medicine, and directs the Human Integrative and Environmental Physiology Laboratory at Mayo Clinic in Rochester, Minnesota, and Phoenix, Arizona.
Dr. Johnson is Director of the Mayo Clinic Research Unit’s Energy Balance Core Laboratory and leads research in human integrative and environmental physiology. He also serves on the European Respiratory Society task force for the clinical use of lung diffusing capacity for nitric oxide.
Much of Dr. Johnson’s research has focused on factors limiting human performance across clinical syndromes, athletics, and extreme environmental conditions. He has led National Science Foundation-funded research expeditions in Antarctica and conducted field studies on Mount Aconcagua, Mount Everest, and Mount Kilimanjaro. His work has also included studies involving unique populations such as breath-hold divers in Croatia and U.S. Air Force F-22 pilots.
Dr. Johnson’s clinical research focuses on novel methods for detecting and monitoring chronic disease, as well as evaluating environmental factors that may contribute to disease risk. His current research examines the relationship between cardiovascular function and breathing, including neurohumoral, mechanical, hemodynamic, and genetic interactions related to pulmonary and cardiovascular health.