G. Hall Johnson

Co-founder / Past President / Board Treasurer

Hall started his career in advanced technology sales and sales management at Hewlett-Packard, Prime Computer, and FORMTEK. Later Hall joined MindLeaders, serving as Director of its ISV Division, Director of Strategic Partners and Alliances, and ultimately Sr. Director of Sales. He was Head of Operations for the Compassionate Communication Center of Ohio before starting MassMatrix.

Hall’s BS in Engineering Management is from Rensselaer Polytechnic Institute. Hall has commercialized new products and markets in operational and business development leadership roles. He has managed sales and service teams for enterprise software sold to Fortune 500 companies. At Hewlett-Packard, he learned to use mass spectrometers. At MassMatrix, he raised two rounds of seed funding, executing on State of Ohio and NIH grants. He formed and led a team of scientists and software engineers and acquired two development collaborations with pharmaceutical companies. Hall commercialized mmSearch—a valued mass spectrometry software tool with a worldwide user community developed by co-founder Michael Freitas. Over 750 scientists have used a freeware version of mmSearch.

Professor Michael A. Freitas, Ph.D.

Co-founder / Chief Science Officer / Board Secretary

Mike is the inventor of MassMatrix's protein and oligonucleotide analysis solutions for pharmaceutical companies and healthcare research centers. Mike oversees innovation, leading ongoing development and support of its RNA and conjugates analytic solutions.

Professor at The Ohio State University’s Department of Cancer Biology and Genetics in the College of Medicine at the OSU Wexner Medical Center, Mike has worked in mass spectrometry and proteomics for over 30 years with the last 20+ years developing and improving mass spectrometry and bioinformatic methods in cancer proteomics and chromatin biology. Mike received the American Society for Mass Spectrometry’s Research Award for his work excellence. He also directs the OSU College of Medicine’s Biomedical Science Graduate Program and codirects OSU’s Comprehensive Cancer Center Proteomics Shared Services.

Mike earned his BS and Ph.D. in chemistry at Oklahoma State and Kansas State Universities, respectively. His postdoctoral service was at Florida State University and the National High Magnetic Field Laboratory.

See Mike's bio and publications at https://cancer.osu.edu/find-a-researcher/search-researcher-directory/michael-a-freitas

Dave Ditmars

President / CEO / Board Chair

Dave Ditmars is a market and business development executive with extensive experience in marketing enterprise software systems and online information services, as well as capital equipment and analytical tools for R&D, QA, and QC, used for new product development in multiple industries worldwide.

Dave drove growth at CompuServe, Battelle’s Information Dimensions, Gilson Company, and United McGill Corporation. He has a BA from University of Vermont and an MA from Northeastern University. His studies in Ohio State University PhD, MPA, and MBA programs concluded with a thesis on healthcare cost containment.