John Peiserich specializes in environmental risk and compliance. With over 30 years of experience, John provides consulting and expert services for heavy industry and law firms throughout the country with a focus on Oil & Gas, Energy, and Public Utilities, including serving as an expert witness in arbitration proceedings and in state and federal courts. He has extensive experience evaluating the risk associated with potential and ongoing compliance obligations, developing strategies around those obligations, and working to implement a client-focused compliance strategy. John has appointments as an Independent Monitor through EPA’s Suspension and Debarment Program. John routinely supports clients in a forward-facing role for rulemaking and legislative issues involving energy, environmental, Oil & Gas, and related issues. Throughout his career, John has been engaged in both domestic and international projects by clients in the manufacturing, chemical, power, oil & gas, and public sectors.
Kimberly Logue Ortega specializes in environmental risk and compliance. With over fifteen years of experience in the areas of environmental and natural resources law, Ms. Ortega provides consulting and expert services for industrial facilities and law firms throughout the country. She has extensive experience with assessing and managing potential and ongoing compliance obligations with innovative client-focused strategies in the industrial, oil & gas, manufacturing, chemical, and public sectors, including coordinating with and advising receiverships on compliant management practices. Ms. Ortega conducts environmental compliance audits, advises clients on the development of effective environmental management systems, and conducts due diligence associated with mergers and acquisitions. She routinely supports clients on rulemaking and legislative efforts focused on environmental and natural resources issues.
Chris Davin joined J.S. Held in November of 2022 as part of J.S. Held's acquisition of Frostbyte Consulting.
Matthew Wunderink has over 18 years of experience in industrial hygiene, environmental assessments, remediation oversight, mitigation supervision, and environmental issues resulting from catastrophic events such as water damage, microbial damage, fires, and regulated materials. Matthew has a wide range of project experience spanning residential, large manufacturing facilities, hospitality groups, active construction sites, and property management. Matthew has specialized experience in large-scale portfolio-wide program development of client environmental health and safety operations.
Jeff Bannon, PG, joined J.S. Held in May of 2026 as part of J.S. Held's acquisition of Clark Seif Clark, Inc.
Jacque Denis joined J.S. Held in May of 2026 as part of J.S. Held's acquisition of Clark Seif Clark, Inc.
Derrick Denis joined J.S. Held in May of 2026 as part of J.S. Held's acquisition of Clark Seif Clark, Inc.
Theresa Chimento is the Chief of Staff for the Environmental, Health & Safety practice of J.S. Held. She brings over 19 years of experience as an environmental consultant, having led complex projects involving disaster response, environmental assessment, design, and project management. Her work spans a wide range of catastrophic events, including flooding, hurricanes, fires, and wind damage, as well as large-scale construction and rehabilitation projects involving hazardous materials.
Michael J. Novak, LSRP, joined J.S. Held in 2021. Prior to joining J.S. Held, he was President of Atlantic Environmental Solutions, Inc. | | Michael has over 30 years of experience in managing and implementing environmental consulting and remediation services. He has directed over $150 million in environmental projects at over 6,000 client locations across 45 states. He was among the first individuals to be issued a license by the State of New Jersey under its Licensed Site Remediation Professional (LSRP) program. His expertise includes environmental due diligence, brownfield redevelopment, soil and groundwater investigation and remediation, underground storage tank compliance, hazardous waste management, and regulatory compliance.