About Us

Renaissance Code Development, LLC (RCD) was founded in February 2018 by a group of scientists and engineers. RCD offsets the escalating costs of software development and maintenance by delivering unparalleled computational integrity and advancement. Today’s technological improvements make it easier than ever to upgrade dated codes making them more intuitive, easier to use, and with increasingly automated data analysis.

Headquartered in Corvallis, Oregon, with satellite offices in Austin, Texas and Seattle, Washington, our software developers and consultants have decades of combined experience in radiological health and safety, offering expert advice and perspectives to client projects. Our team can develop custom software solutions in many scientific/engineering areas.


Dr. David Hamby
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David M. Hamby Founder & Managing Partner
Dr. Colby Mangini
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Colby D. Mangini Partner
Dr. Roland Benke
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Roland R. Benke Partner
Mr. James Skinner
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James A. Skinner Controller


​Krystina Tack Ph.D., DABR Consulting Medical Physicist

​Dr. Tack received her PhD in Medical Physics from the University of Texas Health Science Center at San Antonio, and holds an MS in Radiation Health Physics, and a BS in Pre-Medicine, both from Oregon State University. Tack, Incorporated is a medical physics consulting company based in Camas, WA, providing expertise in areas where radiation and medicine intersect, taking contract work in Radiation Oncology, Diagnostic Imaging, and Radiation Protection. Krystina Tack has 12+ years’ experience working in the field of medical physics, education, and professional development.

Abdulsalam M. Alhawsawi Ph.D., MBA Consulting Health Physicist

Dr. Alhawsawi earned his Ph.D. in Radiation Health Physics from the School of Nuclear Science and Engineering at Oregon State University (OSU) in the summer of 2017. He earned an MBA from the OSU College of Business that same year. Salam is an active member of the Health Physics Society (HPS) and the Institute of Electrical and Electronics Engineers (IEEE). His research interests include: development of new generation radiation detectors, development of digital pulse processors, and digital signal processing. Salam is currently an Assistant Professor in Nuclear Engineering at King Abdulaziz University (KAU) in Jeddah, Saudi Arabia.

William K. Breeden M.S. Consulting Medical Physicist

Will Breeden is a consulting medical physicist certified by the American Board of Radiology in Diagnostic Radiologic Physics and Nuclear Medicine Physics. He volunteers for the American Board of Radiology and is actively involved in the American College of Radiology accreditation program as a Senior Reviewer and Committee member. He provides medical physics consulting services to clients across many different States.

Jarvis A. Caffrey Ph.D. Consulting Engineer

​Dr. Caffrey has over 10 years’ experience in Health Physics and Nuclear Engineering, starting as a radiation safety technician at Oregon State University while also pursuing detection and dosimetry research. His early research interests in space radiation dosimetry and radiation transport have led to a career at NASA that includes nuclear propulsion, cosmic and nuclear shielding, and radiation damage research.

Anthony J. Di Pasqua Ph.D. Consulting Scientist

Dr. Di Pasqua is an Assistant Professor of Pharmaceutical Sciences at Binghamton University in New York. His research interests focus on nanomaterials for chemo- and radio-therapeutics, as well as metals in medicine. He is a graduate of Syracuse University and recipient of the Ruth L. Kirschenstein Postdoctoral Fellowship at the Lombardi Comprehensive Cancer Center at Georgetown University. He’s held faculty/research positions at the University of North Carolina and the University of North Texas.

Abi T. Farsoni Ph.D. Senior Consulting Physicist

​Dr. Farsoni is an Associate Professor in the School of Nuclear Science and Engineering at Oregon State University (OSU). He has more than two decades of experience in academia and industry. Dr. Farsoni is an expert in nuclear detection systems, high-performance electronics for radiation detection, and digital processing hardware and firmware. At OSU, Dr. Farsoni teaches courses in radiation detection, radiation shielding, radiation dosimetry, and digital radiation spectroscopy.

Joseph M. Greco CLSO, CHP Consulting Medical/Health Physicist

Joe Greco has over 30 years of 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. Joe received his MS in Radiological Hygiene from the University of North Carolina at Chapel Hill, and has worked at Princeton Plasma Physics Lab and Eastman Kodak Company. Joe is currently a consulting medical physicist at Upstate Medical Physics in Victor NY. He is a Certified Health Physicist and Certified Laser Safety Officer, and remains active professionally.

Chris C. Nagle M.D. Consulting Physician

Dr. Nagle is uniquely educated and experienced both as a health physicist and practicing physician. He has expertise in the medical effects of ionizing radiation in clinical, industrial, military, aerospace, and disaster realms. He studied health physics at the University of Michigan and worked as a senior radiation health physicist for Georgetown University Medical Center. Later, Dr. Nagle trained in nuclear medicine at Johns Hopkins Hospital and in aerospace medicine with NASA. He is board certified in aerospace medicine and has worked as a corporate commercial pilot and contract flight surgeon with the United States Air Force.

Blake Orr M.S. Consulting Health Physicist

Mr. Orr is a Senior Scientist at the Australian Radiation Protection and Nuclear Safety Agency. He has over 10 years’ experience working in health physics and radiation protection. His areas of expertise include atmospheric modelling, radiation dose reconstruction, environmental radiation assessment, and spatial visualizations using GIS tools.

Vincent T. Remcho Ph.D. Senior Consulting Chemist

Dr. Remcho is a Professor of Chemistry and Professor of Materials Science at Oregon State University. His research group works at the interface of science and engineering to design, fabricate and optimize microfluidic instruments for biochemical, environmental, and nanomanufacturing problem solving. Research support is from DARPA, NASA, NIH, DOE, NSF, the Air Force, Army and Naval Research Laboratories, the Bill and Melinda Gates Foundation, the W.M. Keck Foundation and the Murdock Charitable Trust. He has authored ten book chapters and more than 100 technical papers.

​Modeste T. Tchouaso Ph.D. Consulting Scientist

Dr. Tchouaso is a postdoctoral research fellow in physics at North Carolina A&T State University. He earned his Ph.D. in Nuclear Engineering at the University of Missouri Columbia. Modeste is a co-author of Nuclear Battery and Radioisotope textbook and a Fulbright alumnus. His current research includes development of beta radiation detectors, detector instrumentation development, beta dosimetry, neutron dosimetry, and Monte Carlo transport simulation using MCNP, Penelope, and Geant4.

​Brian G. Woods Ph.D. Senior Consulting Engineer

​Dr. Woods is a Professor in the School of Nuclear Science and Engineering at Oregon State University. He has over 18 years’ experience in experimental and computational fluid dynamics, nuclear reactor safety analysis and advanced nuclear reactor design.

​David Boozer Ph.D., CHP Consulting Health Physicist

​Dr. Boozer started his career in the U.S. Navy's Nuclear Power Propulsion program in 2009 as a Power School Instructor. During his early years in the Navy, he developed an interest in nuclear power and health physics, which led to his master's in nuclear engineering and later his Ph.D. in radiation health physics. His research interests are in personal dosimetry and radiation transport modeling, specifically with the MCNP compute code. He is an expert in the field of dosimetry and incident response.

​Chris Graham CHP, MSNE Senior Consultant

​Mr. Graham has nearly 45 years of experience in Health Physics and Radiological Assessment. Chris worked at the industry-leading Ameren Callaway Energy Center for 38 years before retiring. During his time at Callaway, he developed expertise in Emergency Preparedness, offsite dose assessment, radiological environmental monitoring, internal dose assessment, radiation dosimetry, skin dose assessment, gamma ray spectroscopy, radiation detection and measurement, licensing, and radiation shielding analysis. During this time Chris was also a licensing engineer for the Chornobyl New Safe Confinement project and developed a nationwide radiation protection curriculum for a network of 17 junior colleges. During his time at the Missouri University Research Reactor, he developed cutting edge techniques for the instrumental analysis of geological material and biological material by gamma ray spectroscopy.