Management Team

Joe Goldberger 

President and CEO Joe Goldberger started as President and CEO of Interrad Medical in January 2005 and has utilized his leadership and management experience to bring financing, key advisors, and personnel into the company. Prior to Interrad Medical, Joe had 20 years of business experience at GFI, a privately held food manufacturing company. Joe attended the University of Minnesota, focusing his studies in the areas of business and political science.

Jeff Killion

Vice President and Chief Marketing Officer Jeff Killion has 20 years of experience in the medical industry, most recently as VP of Marketing at Velocimed. Previously, Jeff was a Group Marketing Manager at Boston Scientific SCIMED working on their leading TAXUS drug-eluting stent program. Jeff has a Bachelor of Science degree in Microbiology from the University of Minnesota and a Master of Business Administration degree from Northwestern University’s Kellogg School of Management.

Stephen Zielinski

Vice President of Sales Steve "Zeke" Zielinski comes to Interrad Medical with over two decades of successful medical device experience. He has run sales organizations at Boston Scientific, Angiotech, and most recently LifeWatch Services. He is also a veteran of product device launches and successfully launched Boston Scientific's new drug eluting stent to a #1 market share position. Zeke has a Bachelor of Science degree in Business Management from Purdue University.

Sew-Wah Tay, PhD

Vice President Regulatory and Clinical Sew-Wah Tay has a broad background in the areas of design, materials, quality, clinical, and regulatory. Her most recent position was VP Regulatory and Clinical Affairs for American Medical Systems. Prior to that she was VP of Regulatory and Clinical at Velocimed until it was acquired by St. Jude Medical. Sew-Wah has a BS from Universiti Pertanian Malaysia, and a MS in Chemical Engineering and PhD in Biomaterials from MIT.

Michael Rosenberg, MD

Chief Medical Officer Currently in private practice as an Interventional Radiologist in St. Paul, Minnesota, Dr. Rosenberg is also a Clinical Assistant Professor of Radiology, Department of Radiology, Division of Cardiovascular and Interventional Radiology, at the University of Minnesota Hospital and Clinics and has served as a consultant to several major medical device companies. Dr. Rosenberg is first author on the patent of two Interrad Medical devices and co-author on a third.

Nancy Ness, CPA

Chief Financial Officer Nancy Ness has served as acting CFO at a number of well-known medical device start-ups including Velocimed (acquired by St. Jude), Anulex Technologies, Kspine, CVRx, Coaxia, Lumen Biomedical and Hemosphere (formerly GRAFTcath). Nancy received her BA in Accounting and Business Administration from the University of St. Thomas and a Certified Public Accountant license in 1984.