Meet our Team

Please let us know how we can best meet your needs.

Craig Zadra CEO - 715-234-6518

Dan Petry, Account Executive- Dan initially took a position with SMT in 1991. He left in 1995 to earn his degree as an Ultrasound Technologist and returned in 1999. In 2004, he began a career at Siemens Healthcare for over 10 years as a Regional Sales Consultant. Lured back by the opportunity to be closer to his family, Dan returned in 2014 to work as an Account Executive to expand our current business. He can be reached on his cell at 715-651-5792 or email

Leo Dunlavy, Account Executive- Leo started with SMT in 2017 as an Account Executive, Service Manager, and New Projects Coordinator. He comes from a 19 year career with John Deere Power systems utilizing his Mechanical Engineering degree in both applications and sales. You can reach Leo on his cell at 715-651-2870, or email

Lisa Becker, Office Manager- Lisa came on board with SMT in 2014. She has 29 years of Customer Service background and has a diploma in the Office Technology Assistant program from WITC-Rice Lake. Lisa oversees the Dispatching Team to provide excellent customer service and efficiency in scheduling our technologists to provide medical exams to multiple facilities in three states. Lisa can be reached at 715-234-6518 or by email at

Greg Lyga, Director of Molecular Imaging & RSO - Greg has been working in the field of nuclear medicine since 1997. He earned his B.S. degree in Nuclear Medicine Technology, Inc. in 1997 from UW-LaCrosse and began his nuclear medicine career at Shared Medical Technology immediately after. He trained under David Ricci and became Radiation Safety Officer in 2014. He is currently the Director of Molecular Imaging. Greg can be reached at 715-651-5782 or by email at

Tony Anderegg, Director of Ultrasound -Tony has 21 years of ultrasound experience after beginning his career with Shared Medical Technology in 1999. After earning his Diagnostic Medical Sonography degree from CVTC, he started at SMT as a sonographer, and is currently the Director of Ultrasound. His current position allows him to focus on his passion of providing excellence in both patient care and customer service. Tony can be reached on his cell at 715-829-9333 or email at

Brian Simonson, Director of Echocardiography - Brian has 16 years of Echocardiography experience. After finishing his B.S. degree in Health and Human Performance in 1999, he went on to earn his Echocardiography degree in 2005 from St. Cloud Technical College. He joined the SMT team in 2006 and is currently the Director of Echocardiography. Brian can be reached on his cell at 612-345-1484 or by email at