Board of Directors

Robert Assell | Founder

Jim Bullock | CEO

Kirk Nielsen | Versant Ventures

Brian Halak, Ph.D. | Domain Associates

Mike Sherman | MB Venture Partners

Dave Stassen | Split Rock Partners

Robert Weigle | Benvenue Medical

Executive Management Team


Jim Bullock | President and CEO

Jim joined Zyga Technology as President and Chief Executive Officer (CEO) in Nov. 2011. Prior, he served as President and CEO of Atritech, Inc. until it was sold to Boston Scientific and of Endocardial Solutions, Inc., which was acquired by St. Jude Medical. Jim began his career at American Hospital Supply, which was later acquired by Baxter Healthcare. During his 13 years at the company, Jim served in a variety of Sales & Marketing leadership positions. He holds a Bachelor of Science degree in Hospital Administration from the University of Arizona.

Brad Swatfager | Chief Financial Officer
Brad joined Zyga Technology in March 2013. Most recently, he served as Chief Financial Officer (CFO) of Atritech, Inc, where his responsibilities included Finance, Clinical Affairs and Regulatory. Atritech was sold to Boston Scientific in 2011 and Brad was named Vice President/General Manager of the Atritech business. Prior, Brad’s work experience included positions at Velocity Express and Ernst & Young, LLP. He is a graduate of the University of North Dakota with a degree in Accounting.
Maggie Wallner │Vice President of Marketing
Maggie has over 25 years of senior management, marketing and training experience, with early stage, medium and large medical device companies. Before joining Zyga Technology in March 2016, Maggie held senior positions at Torax Medical as well as Atritech, Inc. (acquired by Boston Scientific in 2011). During her tenure at Atritech, she was responsible for commercial and clinical marketing, training including field and physician training, US and OUS reimbursement strategies as well as management of the US field and marketing teams. Prior, she held positions at St. Jude Medical and Pharmacia/Smiths Deltec. Maggie holds a Bachelor of Science in Business Administration & Marketing and a Master’s in Business Administration from the University of St. Thomas.
Chris Welch │Vice President of Sales, Western United States
Chris brings more than 25 years of experience in sales, marketing and general management to Zyga. Prior to joining Zyga in 2016, Chris served as President and CEO of TransCorp Spine as well as holding positions increasing in responsibility within the healthcare industry, including Baxter, Johnson & Johnson, I-Flow and Kimberly Clark. While serving at these companies, Chris generated triple-digit sales growth and multi-million dollar revenue streams. Most notably, he was General Manager and Vice President of Sales at I-Flow, where he led a sales transformation that resulted in the I-Flow acquisition made by Kimberly Clark. Chris is a graduate of the University of South Florida.

Dave Michaelson | Vice President of Sales, Eastern United States
Dave has over 25 years of senior management, sales and business development experience, specializing in launching new technologies in the medical device industry for Fortune 500 companies, as well as early stage companies. Before joining Zyga Technology in May 2012, Dave sold Cardiac Rhythm Management for Guidant/Boston Scientific and Medtronic. Prior, he held positions of increasing sales management and leadership responsibilities with SCIMED (now Boston Scientific Corp), Conceptus and Urologix. Dave started his career with American Hospital Supply where he held various positions in Marketing & Sales. Dave holds a Bachelor of Science in Business Administration/Marketing from the University of Arizona.