Dr. Clint Miller is a Senior Technical Director at J.S. Held, specializing in geochemistry and hydrogeology. He provides consulting and expert services for various public and private-sector clientele throughout the United States. He has led international projects onshore and offshore in the Independent State of Papua New Guinea, the Republic of the Philippines, the East Siberian Sea, the Republic of China (ROC), and the Hellenic Republic.
Amanda Ragatz specializes in water resources, environmental permitting, National Pollutant Discharge Elimination System (NPDES) permitting strategies, Clean Water Act (CWA) 316(b) regulations and compliance, geographic information systems (GIS), biological monitoring, ESG services, and sustainability. With 14 years of experience, Ms. Ragatz provides consulting and expert services related to project planning and development, regulatory permitting, and permit compliance.
Luke Erdley serves as a project technician, traveling to support major remediation efforts and wetland delineations while providing multidisciplinary field expertise across environmental assignments. He has experience in soil and groundwater remediation, supporting projects involving hazardous chemical transfers, environmental cleanup activities, and the transport of dangerous materials. This also includes horizontal and vertical gravel‑bed reactions, ion‑exchange systems, and glycerin injection.
Austin York has been an environmental consultant and field geologist since 2012. His primary expertise includes the characterization of impacted sites via various soil, groundwater, and air sampling techniques; providing oversight and direction of remedial activities such as underground storage tank removal, mass excavations, and in-situ remediation programs; and developing technical and regulatory reports.
Nate Hinsperger is a Senior Geologist and Project Manager in J.S. Held's Pacific Northwest Remediation group. The Pacific Northwest Remediation Group provides services to private and public sector entities, including environmental consulting, due diligence, remedial investigations, feasibility studies, remedial design, cleanup action support, and all project regulatory documentation. He provides consulting and technical support for clients in various industries, including real estate and commercial and manufacturing operations. His primary focus is managing all aspects of environmental projects from inception to site closure.
Adam Morine is a Principal Engineer with over 27 years of experience providing consulting and engineering expertise for various clientele. Adam’s experience ranges from site investigations and feasibility studies to remediation and site closure. Adam’s focus is assessing reasonable and pragmatic solutions for sites where remedial and/or institutional and regulatory approaches are required to obtain site closure. His knowledge of site investigation, remediation, and closure techniques is often applied to litigation and cost recovery cases on behalf of private property owners, attorneys, and insurance companies. Adam has been the corporate Engineer of Record for two prior organizations.
Kory W. Johnson, MPH is an Environmental Scientist at J.S. Held with over ten years of experience in health sciences working in clinical and community health settings. He has led several public health initiatives, addressing social determinants of health and managing the impacts of infectious diseases in underserved communities. He has extensive experience analyzing health data, synthesizing research findings, and implementing evidence-based interventions to promote health and safety.
Michelle Bulnes is an Environmental Scientist focusing on environmental remediation, investigation, and consulting. She has worked in several project settings, including commercial, industrial, and residential. She specializes in environmental fieldwork, which includes project-specific tasks, assessments, inspections, and groundwater, air, and soil sampling. Michelle has experience in report writing and NJDEP documentation.
Jacob Munson-Decker is a Senior Health Scientist at J.S. Held who brings nearly a decade of experience in industrial hygiene, exposure assessment, toxicology, risk assessment, sampling and analysis, risk communication, and emergency response to chemical releases.