Key Personnel

David Mazyck, PhD, CEO, Director of Technology

Dr. Mazyck is a world-leading expert on activated carbon (AC) and its applications including mercury capture. He has developed AC products for the major multinational AC manufacturers and has regularly consulted for them on technical issues. Dr. Mazyck is Chairman of the Activated Carbon Standards Committee for the American Waterworks Association and has developed products for NASA. He is a member of the World Coal Association and an appointee to the United Nations, playing a key role in the efforts to develop a global treaty for mercury. He received his PhD from Penn State University in Environmental Engineering where he also earned a PhD Minor in fuel science.


Regina Rodriguez, Chief Operating Officer

Regina earned her BS in Environmental Engineering at the University of Florida and is currently an NSF Graduate Research Fellow finishing her PhD research focused on activated carbon in both the air and water phases. She oversees the entire sales team, leading the company’s efforts in this area and working closely with customers. Regina’s extensive research experience also allows her to collaborate with Carbonxt’s R&D Director in developing technology that better meets their customer’s needs. At this time, she splits her days between her academic research and Carbonxt, with plans to come on board full time in 2018.


Dennis Baranik, MBA

Dennis is responsible for various strategic initiatives for Carbonxt, in addition to managing the overall operations of the company. Prior to joining Carbonxt, he held executive positions in strategy, marketing, business development and finance for various companies in the automotive, marketing, consulting and investment industries.

Dennis is a graduate of the University of Pittsburgh where he earned a bachelor’s degree in Business/Economics and an MBA with concentrations in Finance and Marketing.


Jack Drwiega, ME, PE, Operations Director

Jack oversees Carbonxt operations including production and delivery, activated carbon injection (ACI) test programs, and managing engineering projects. Prior to joining Carbonxt, Jack worked as an environmental engineering consultant serving as a project engineer and project manager in the water and wastewater treatment field.

A graduate of the University of Florida, Jack earned a Bachelor of Science and Master of Engineering in Environmental Engineering.


Christine Valcarce, PhD, R&D Director

Christine is a graduate of the University of Florida where she earned a Bachelor of Science, Master of Engineering, and Doctor of Philosophy in Environmental Engineering. Her graduate studies were funded by the prestigious NSF graduate research fellowship and focused on multi-variable regression modeling of activated carbon performance in water treatment. Previous research experience includes photocatalysis of VOCs from frac water and redox bio-chemistry of iron in landfill leachate. Since joining Carbonxt as R&D Director, Christine has been energetically researching and developing sorbent products for mercury capture from WFGD wastewater.


Erica Gonzaga, ME, Applications Engineer

Erica graduated from the University of Florida with a Bachelor of Science degree in Biological Engineering and a Master of Science degree in Environmental Engineering where she focused her research on mercury chemistry and advanced treatment technologies. Erica is a key part of the sales opportunities for Carbonxt, communicating directly with utility and power plant personnel, including on-site visits, overseeing full scale testing, and providing overall customer service. She also works closely with our research & development team, serving as one of the conduits between Carbonxt’s R&D developments and our customers, helping direct R&D goals based on utility feedback.


Lindsey Costin, Applications Engineer

Lindsey has a Bachelor of Science in Chemical and Biomolecular Engineering from the Georgia Institute of Technology. She spent her time before Carbonxt working as a Project Manager with a materials testing company in Georgia assisting individual client issues ranging from polymers to pharmaceuticals. Lindsey provides the Carbonxt team with her skills in forward thinking and client acquisition to identify industry needs and provide exemplary customer service.