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Meet our Leadership
Michael R. Kennedy
President - Global Physics Solutions
Vice President of Global Marketing - LANDAUER, Inc.
Michael Kennedy has over 25 years of healthcare technology innovation and commercial leadership experience in both Fortune 500 and smaller private healthcare companies. Previously, he has held C-level positions in strategic marketing, operations, product development, and general management at Baxter Healthcare, GE and private healthcare companies. In these roles, he led significant medical device innovations and business transformations in dialysis, blood component therapy, inhaled drug delivery and diagnostic imaging lifecycle management services. Mr. Kennedy received a BS in Chemical Engineering from the University of Washington and an MBA from J.L. Kellogg Graduate School of Business at Northwestern University.
Amy Cosler
Vice President of Sales - Global Physics Solutions
Vice President of Sales - LANDAUER, Inc.
Amy Cosler is a highly accomplished sales leader with more than 17 years of business experience concentrated in the healthcare market. She began her career with Medi-Flex Hospital Products and spent 11 years with Cardinal Health, Allegiance Healthcare and Baxter Healthcare where she earned such awards as Region Manager of the Year and the President’s Award. Amy has been a featured panelist at the Northwestern University Kellogg School of Management and the University of Chicago Booth School of Business. She is also a member of the Executives’ Club of Chicago. Cosler earned her Bachelor of Business Administration at Kent State University, graduating Magna Cum Laude.
Mike Shaffer
Vice President of Business Development
Therapy
John Swanson, PhD DABR DABMP
Senior Vice President, Therapy Services
Dr. Swanson has over 40 years experience as a Health Physicist and Medical Physicist. As an Air Force officer, he was responsible for managing all aspects of the radiation safety programs in Europe and Eurasia. Later in his Air Force career, he was the senior Medical Physicist and Air force consultant to the Surgeon General. Dr. Swanson has Board Certifications in both Diagnostic and Therapeutic Radiological Physics and has practiced in both areas for a majority of his professional career. He has supervised the creation of over 20 Radiation Oncology facilities and managed several of these facilities to a successful outcome. In 1996 he formed a Medical Physics practice group, which became the largest in the Midwest over a 12-year period. This group joined GPS in 2008 and Dr. Swanson assumed and currently occupies a senior role with GPS’s clinical leadership team.
Susan Folkerth
Vice President and Chief Operating Officer, Therapy Services
Susan Folkerth manages the operations for over 110 professionals in over 52 hospital-based and freestanding therapy treatment facilities. She has held leadership positions in the healthcare space for over 35 years, including both executive and senior consulting roles in clinical, business development and large-practice management initiatives for hospitals, freestanding centers and international imaging consortiums. Susan managed a $150 million hospital-system construction program, the construction of the first PET/Cyclotron facility in the Midwest, and the construction of the first radiation oncology facility in the Midwest to perform Stereotactic Radiosurgery. In 1996 she co-founded the largest imaging and therapy Medical Physics Practice Group in Ohio, Comprehensive Physics Services, Inc (CPSI), functioning as CEO for several years before merging with Global Physics Solutions in 2008.
Christopher T. Baird, MS DABMP
Regional Director, Therapy Services, West
Chris Baird has an MS in Medical Physics from the University of Texas, Health Science Center at Houston and is ABMP certified in radiation oncology physics. He is a clinically oriented physicist, responsible for the day-to-day operations of several centers, whose clinical offerings cover a majority of current patient treatment options. In addition to standard QA duties, he has personally planned hundreds of RapidARc, IMRT, brachytherapy, stereotactic, and 3D patient treatments. His experience in providing short-term program implementation services includes training in RapidARC and IMRT implementation with proprietary multi-day courses, and commissioning over 60 linear accelerators in the past five years. He is certified by Varian as a RapidArc commissioning services provider.
Douglas E. Boccuzzi, MS DABR
Regional Director, Therapy Services, Northeast
As VP of GPS’s Bridge Physics program, Doug Boccuzzi coordinates with new clients for initial physicist coverage and establishes GPS standards before staffing with permanent placement. He earned his BS in Physics at Fairfield University and his MS in Physics at the University of Connecticut with a thesis in permanent magnetic materials. He also earned his MS in Medical Physics at Columbia University. Douglas gained clinical experience at St Luke’s-Roosevelt Hospital/Beth Israel Medical Center in New York, New York and Roswell Park Cancer Institute in Buffalo, New York, specializing in Radiation Oncology Physics with a focus on stereotactic radiosurgery and high dose rate brachytherapy. He gained leadership/management experience as Chief Radiation Oncology Physicist at Hartford Hospital in CT. Douglas is currently the President of his local AAPM chapter (CAMPS).
Nathan Davis, MS, DABR
Regional Director, Therapy Services, Midwest
Nathan Davis earned a BS in Physics with a minor in Mathematics from Indiana University in Bloomington, Indiana, where he participated in a research program at the Cyclotron Facility. He went on to earn his MS in Medical Physics from the University of Wisconsin – Madison with a focus on instrumentation and calibration. During this time, he worked and performed research at the Radiation Calibration Lab (Accredited Dosimetric Calibration Lab). Following graduation, he came to work for GPS (formerly ARC/Arete Medical Physics) in South Bend, Indiana, where he spearheaded their venture into the Indianapolis radiotherapy market. He obtained his ABR certification in 2007.
Yuri Ellis, MS DABR
Regional Director, Therapy Services, Midwest
Yuri Ellis earned his M.Sc. from Loyola University in 1998. In 2000, he went on to receive his MS in Medical Radiation Physics from Rosalind Franklin University in Chicago. He earned his ABR certification in 2005. Yuri began his career as a Junior Medical Physicist with US Oncology. In 2002, he joined GPS (then Advanced Radiotherapy Consulting) and now serves as the Vice President of Clinical Operations for the Western United States. Yuri has specific expertise in shielding design/site development, Varian Linear Accelerator commissioning, Varian Eclipse Beam Modeling and various special procedures including HDR, LDR, SRS, SBRT, TBI, TSET and Tomotherapy.
Steven A. Gasiecki, MS DABR
Regional Director, Therapy Services, Midwest
Steven Gasiecki received his MS in Physics with a concentration in Medical Physics from SUNY at Buffalo in 2002. His clinical experience and medical physics-related coursed were at Roswell Park Cancer Institute in Buffalo, NY, under the guidance of Matthew Podgorsak. Steven became ABR certified in 2006 and has eight years of experience as a clinical Medical Physicist with experience in all modalities of radiation therapy including stereotactic radiosurgery and high dose rate brachytherapy. He has been in management since the spring of 2008, specializing in establishing new centers and enhancing operations at existing centers.
Norm Lehto, MS DABMP
Regional Director, Therapy Services (Commissioning Services)
Based in Thousand Oaks, California, Norm Lehto brings 20 years of medical physics experience to the GPS commissioning team. He has provided IMRT implementation training to over 50 treatment centers and has commissioned over 150 linear accelerators. Norm received his MS in Medical Physics from the University of Wisconsin. He went on to receive his ABMP in Radiation Oncology Physics and in Diagnostic Imaging Physics. He is the co-founder of many companies, including Medfiz, Inc., Arete Medical Physics, Ascend Medical Physics and Global Physics Solutions (GPS).
Francisco Nunez, MS DABR
Regional Director, Therapy Services, Midwest
After graduating with a BS in Physics from the University of Wisconsin – Eau Claire, Francisco Nunez worked for five years at IBM as a Software Engineer and Quality Engineer. He then attended graduate school at the University of Wisconsin – Madison, where he received his MS in Medical Physics. He has extensive Pinnacle beam modeling experience and has traveled the country helping to both open new cancer centers and update aging ones. He obtained ABR certification in 2008.
Bill Root
Regional Director, Therapy Services, Southeast
Bill Root is a graduate of Emory University and is certified by the American Board of Radiology. Bill served on the Emory faculty prior to moving to Charlotte, N.C. in 1978 where he joined with a Radiation Oncologist to create one of the first Linear Accelerator based Radiation Therapy facilities in the Southern Piedmont area – P&CP. For 32 years Bill pioneered many innovations in the practice of Medical Physics, from implementing one of the first 3D treatment planning systems to designing the first Stereotactic RS program in the region. P&CP joined GPS in 2010. Currently, Bill specializes in TomoTherapy clinical applications and QA methodology. Bill is an active member of the AAPM, the Southeast Chapter of the AAPM, the ACMP and the ACR.
William R. Ruck, II, MS DABMP DABR
Regional Director, Therapy Services, Midwest
Bill Ruck earned a BS in Electrical Engineering from the Ohio State University, an MS in Nuclear Engineering from the Air Force Institute of Technology, and an MS in Medical Physics from Wayne State University. He is board certified in medical health physics and diagnostic imaging physics by the American Board of Medical Physics and in therapeutic radiological physics by the American Board of Radiology. Bill completed a 20+ year career in the United States Air Force, reaching the rank of lieutenant colonel. He has worked as a consulting medical physicist in the Dayton Ohio area for the past six years. His areas of clinical expertise include: external beam radiation therapy, high dose rate brachytherapy, radiation shielding design and radiation therapy equipment calibration/quality assurance. He is a Certified Radiation Expert in Ohio.
Imaging
Bob Pizzutiello, MS, FACR, FAAPM, FACMP
Senior Vice President, Imaging Services
Bob Pizzutiello has over 30 years of experience as a medical physicist. Bob began practicing medical physics in the Cancer Center at the University of Rochester Medical Center in 1977. In 1979, he became Director of Medical Physics at Rochester General Hospital, where his areas of interest and expertise broadened to include diagnostic imaging physics and teaching medical physics to physicians. Bob has always believed in the value of being on the leading edge of professional and clinical developments. In 1987, he helped to pilot test the new “ACR Mammography Accreditation Phantom” at several client facilities. In the early 1990’s he became a medical physicist reviewer for phantom images for the ACR-MAP. After more than a decade of work with the ACR and the Conference of Radiation Control Program Directors (CRCPD), Bob was appointed to the FDA’s Mammography Quality Standards Advisory Committee. When Stereotactic Breast Biopsy was introduced in the early 1990’s, Bob worked with the American College of Radiology (ACR) to develop the ACR Stereotactic Breast Biopsy Accreditation program and co-authored the SBB QC manual. Bob continues to serve on several key committees of the AAPM, ACR and ACMP. Bob is an active lecturer, and has been invited to speak at over 100 programs in the last decade across the U.S., in South America and in China. Bob has also served as consultant to many major imaging manufacturers, contributing his knowledge of imaging and broad practical experience to the manufacturing sector. His current special interests include breast imaging, MRI, and cone-beam CT imaging. In 1983, Bob formed a medical physics practice group, which became the largest private practice imaging physics group in New York State. The group joined GPS in 2010 and Bob assumed and currently occupies a senior role on the GPS clinical leadership team.
Chris Massoll
Vice President and Chief Operating Officer, Imaging Services
Chris Massoll has over eight years of healthcare leadership experience in both large multinational firms and small privately held healthcare companies. Previously, he has held positions in operations, capital equipment sales, product development and marketing and general management at Philips Healthcare and Virtual Radiologic. In these roles he drove significant market share, redesigned and improved multiple business processes, led the business transformation for a paradigm changing healthcare IT SaaS model and was the lead for the combination of the largest US based teleradiology practice with multiple progressive onsite radiology practices. Mr. Massoll received a BS in Electrical Engineering Technology from the Dwight Look College of Engineering at Texas A&M University and an MBA from the Carlson School of Management at the University of Minnesota.
William DeForest, MSPH, CHP, DABR
Regional Director, Imaging Services, Southeast
Bill DeForest serves as President and principle health physicist at ProPhysics Innovations, Inc. Bill is an AAHP certified health physicist and is ABR certified in diagnostic radiological physics. He has held health physics positions in nuclear power, research, nuclear fuel fabrication, DOE and medical settings. As a graduate of University of North Carolina at Chapel Hill, he earned a Master of Science in Public Health and has since accumulated over twenty-five years of experience as a medical physics consultant, specializing in radioactive materials licensing, radiation protection, regulatory consulting and multiple modality accreditations (including CT, MRI, Ultrasound, Mammography and Nuclear Medicine).
Joe Greco, MS, CHP, CLSO
Regional Director, Imaging Services, Northeast
Joe Greco has thirty years diversified experience working with sources of ionizing and non-ionizing radiation and management of their safe use in medical, manufacturing, R&D, and fusion reactor environments. After receiving his degree in Biology, Joe began his professional career as a Nuclear Medicine Technologist. He then attended graduate school and received his Master’s degree in Radiological Hygiene. He spent 5 years as an operational health physicist at Princeton Plasma Physics Lab research reactor in New Jersey. He then joined Eastman Kodak in Rochester and served as their Radiation and Laser Safety Officer for 14 years. Joe joined Upstate Medical Physics in 2006 and is currently the Vice President. His specialties include nuclear medicine & PET support (assessments, acceptance testing), shielding design and calculations for various imaging modalities, radiation safety training, dosimetry, licensing and regulatory support, health physics, and laser and non-ionizing radiation safety.
Timothy Keys, MS, DABR
Regional Director, Imaging Services, Midwest
Tim Keys is a graduate of Washington University, St Louis and Saint Louis University and holds degrees in Biomedical Engineering and Physics. He began his professional career working in Medical Physics software development and FDA Regulatory Affairs / Quality Assurance and has been providing diagnostic medical physics services throughout the Saint Louis region since 2007. Tim completed his Board certification in Diagnostic Medical Physics in May 2011 and specializes in a variety of imaging modalities including R&F, CT, MRI, Ultrasound, and Mammography.
Martin Trefler, PhD
Regional Director, Imaging Services, Florida
Martin Trefler has over 30 years of medical physics consulting experience. He earned his BS in Engineering Physics, MA in Theoretical Physics and PhD in Physics at the University of Toronto. Martin held a number of different faculty roles at both the University of Toronto and the University of Miami and is a published author. Martin founded Diagnostic Physics Consulting, which joined Global Physics Solutions in 2010.