Meet Our Team

Meet the team of project managers, scientists, and specialists who bring their technical expertise and attention to each project.

Lindsay Benko

Soil Scientist I

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Lindsay Benko

Soil Scientist I

Lindsay is an Environmental Scientist focused on helping clients with regulatory compliance for biosolids land application programs. This involves performing site and soil assessments, developing agronomic rates, and aiding in the development of necessary regulatory documents. She graduated from Allegheny College in 2020 with a BS in Biology and Environmental Science.

Kathleen Bertoldi, EIT

Senior Environmental Scientist

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Kathleen Bertoldi, EIT

Senior Environmental Scientist

Kathleen is a Senior Environmental Scientist responsible for providing support to municipal wastewater clients related to permitting, solids management, and market research analysis. She has eight (8) years of experience in environmental and/or water resource engineering with six (6) years as a licensed engineer in training (EIT). In addition, she has experience working in regulatory, consulting, and industry settings. In the public sector she worked as a hydrologist for an interstate water resource management agency, and as a staff engineer for a county municipal solid waste (MSW) landfill. Kathleen has a BS in Environmental Engineering from Penn State.

Robin C. Brandt, Ph.D., PE

Vice President, Shareholder

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Robin C. Brandt, Ph.D., PE

Vice President, Shareholder

Robin is a partner and Vice President of Material Matters. He has over 35 years’ experience in agricultural, municipal, industrial, and food processing residuals assignments. He directs the company’s efforts involving water reclamation and composting facility odor emission studies and biosolids-derived-product odor assessments (current-in-practice and research). Robin contributes to field-trial and plot studies, and participates in the conceptualization/ development of emerging beneficial use strategies such as Deep Row Hybrid Poplar biosolids recycling programs (and related research). He serves as technical project manager on selected assignments and functions as liaison for projects involving consultation with the Pennsylvania State University (PSU) and other selected technical service providers. Robin is a full-time faculty member with PSU (17 years), at the University Park, PA main campus, in the Department of Agricultural and Biological Engineering, where he serves as Senior Lecturer and Director of the PSU Odor Assessment Laboratory.

Lisa Challenger

Senior Environmental Scientist, Shareholder

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Lisa Challenger

Senior Environmental Scientist, Shareholder

Lisa is the Sr. Project Manager with Material Matters, with nearly a decade of wastewater experience. She oversees the project consulting team, ensuring projects are completed to exceed client expectations. Lisa is responsible for supporting clients with the management of water quality nutrient credits, developing comprehensive biosolids market evaluations, evaluating and reporting on permitting and regulatory compliance, and assisting with site and soils evaluation. She is also responsible for assisting clients with biosolids master plan decisions by providing information about the technologies, marketing techniques, and end uses utilized by other biosolids programs. Lisa has a BS degree in Environmental Resource Management from Penn State.

Nickolas Hines

Environmental Scientist I

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Nickolas Hines

Environmental Scientist I

Nick is an Environmental Scientist specializing in regulatory assessments, permitting, and market research analysis. Nick grew up and worked on a dairy farm in Northeast Pennsylvania. He is a recent graduate with a BS in Sustainability from Chatham University and a Master of Natural Resources from Virginia Tech.

Trudy Johnston

Managing Director, Certified Operator, Shareholder

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Trudy Johnston

Managing Director, Certified Operator, Shareholder

Trudy is a partner with Material Matters, and has over 39 years in the municipal and industrial wastewater processing and solids treatment and management field, with 36 years as a consultant. Her primary interests include developing innovative uses and strategies for residuals, optimizing solids processing, conducting solids master studies, assessing compliance with biosolids regulatory standards, data/sample collection and validation, evaluating and resolving odors from residuals, and water quality nutrient trading. She participated in the WERF study with UMASS to assess biosolids stability standards and authored the protocol for the AVSR testing. Trudy has a BS degree in Earth Science from Penn State and is a certified wastewater treatment operator.

Michelle McCall

CEO

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Michelle McCall

CEO

With over 30 years’ experience in the C-suite as an Interim CEO, COO, Project Manager and Management Consultant, Michelle has developed a diverse breadth of leadership experience, having provided transformative results for small business and divisions of Fortune 500 companies. A Penn State University graduate, she earned a Bachelor’s degree in Business Management with a concentration in accounting and finance and a Mechanical Engineering Technology degree. Continuous improvement is her focus as she leads the dynamic team of Material Matters in serving its valued clients.

Christine McLain, PMP

Data Specialist II

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Christine McLain, PMP

Data Specialist II

Christine is a data specialist with a wealth of project management experience. With a background in not-for-profit, she has successfully developed and managed programs for a variety of organizations. Christine has a BS in Business Communications and a PMP from Penn State.

Carl Rosier, PhD

Soil Scientist III

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Carl Rosier, PhD

Soil Scientist III

Carl is a Senior Project Scientist responsible for assisting the municipal, industrial, and food processing residuals beneficial land use program related to permitting, soil monitoring, and agronomic consultation. Carl has extensive experience in assessing the soil microbial and biochemical environment through the application of standard-advanced soil measurement procedures in combination with collecting-evaluating-organizing long-term environmental monitoring data sets. The application of both methodologies provides precise, real-time insight into the dynamic nature of the soil environment allowing both informed management decisions as well as aiding the development/construction of predictive modeling efforts.

Jade Triton

Controller

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Jade Triton

Controller

With more than 25 years of administrative experience in accounting, finance, and program management, Jade has been an operations professional with both non-profit and for-profit organizations in New York City and San Francisco. She has a diverse skillset spanning design and printing project production, office management, human resource administration, process development and improvement, and team leadership. In her current role with Material Matters, she is the financial and administrative manager, while providing support to the senior management and the technical team.

Wade Yankey

Wastewater & Residual Scientist III, Certified Operator

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Wade Yankey

Wastewater & Residual Scientist III, Certified Operator

Wade is an Environmental Scientist with Material Matters, responsible for providing support to municipal wastewater clients related to optimizing wastewater treatment plant operations, permitting, solids management studies, developing bid specifications and request for proposal (RFP) documents, and water quality nutrient trading. He conducts process-related assessments and reports including solids processing and dewatering evaluations to optimize plant performance. He also assists in biosolids market assessment and master planning activities.