Executive Team


Eugene de Ribeaux
President and CEO

Eugene de Ribeaux is passionate about evaluation and the technology available to help organizations collect and analyze data. His goal is to help PTG’s clients maximize their investment dollars and achieve positive change in organizational performance. He joined PTG in 2003, bringing nearly 20 years of software development and project management experience to the company, and took over at the helm as president and CEO in 2009. Certified in best-of-breed evaluation methodologies (Phillips, Kirkpatrick), he has conducted evaluation strategy and planning sessions, overseen long-term evaluation program efforts, and consulted on evaluation impact and ROI analysis exercises in government, private-sector, and non-profit areas. He writes regularly and contributes as an active member of industry groups such as the Federal Government Training Officers Consortium. Eugene received his bachelor’s degree in computer science from Carnegie Mellon University and an MBA degree from the University of Maryland’s R.H. School of Business. He has applied both his experience and education in guiding PTG to be a leader in the field of data analytics for HR initiatives and to be a trusted partner in government and private-sector settings.

Steve Madaras

Steve Madaras
Chief Technology Officer

Steve Madaras keeps IT and telecommunications operations humming for PTG and develops new technology offerings for our clients. He has been instrumental in harnessing MicroStrategy’s Business Intelligence platform to develop dashboards for training evaluation applications that enable PTG clients to gain insights and make critical decisions using learning evaluation data. Steve’s team also ensures that PTG applications comply with industry and government security and usability standards, such as FISMA and 508-compliance. He has bachelor’s and master’s degrees in engineering from Penn State University and an MBA from Johns Hopkins University. He has held security clearances from the U.S. Department of Defense (TS/SSBI) and the U.S. Department of Energy (Q). He also received a U.S. patent as chief architect of a cutting-edge online Digital Media Search System.

Denise Madaras
Director of Evaluation Services

Denise brings a zest for helping PTG’s clients evaluate their training programs, drawing on her in-depth experience in both instructor-led and computer-based training development, delivery, and evaluation. She has been in front of the classroom herself, giving instruction in technical and nontechnical topics in organizational development and education, and on a broader level, she has successfully developed and implemented training programs in government and corporate contexts. She is keen to promote best practices of evaluation methods (e.g., the Kirkpatrick Four Levels model) and the use of technology in support of evaluation. She earned a bachelor’s degree in mathematics from West Chester University and has certifications in mathematics education, Kirkpatrick and Phillips ROI evaluation models, and behavioral consultancy.

Michele Verebelyi

Michele Verebelyi
Director of Organizational Development

The newest member of PTG’s executive team, Michele has joined our team to lead our newest endeavors into Strategic Workforce Planning development and implementation.  She brings over 20 years of organizational development, leadership development and human resources experience working in the private, public and non-profit sectors with high-profile organizations managing others to achieve business objectives and create successful change. She has demonstrated presentation, facilitation and coaching skills influencing groups at all levels of an organization and an infectious enthusiasm for quality customer service.  Michele has a bachelor’s degree in management from Southern Illinois University and a master’s degree in organizational development from Loyola University Chicago.  We are excited to have Michele join the PTG Team!  Welcome, Michele!