Clean Harbors Executive and Leadership Team

Eric Gerstenberg, the Co-President & Co-Chief Executive Officer at Clean Harbors, directs the overarching strategic vision for environmental and industrial service operations. Overseeing the integration of waste collection, treatment, and disposal networks, the Co-President & Co-Chief Executive Officer ensures operational excellence across all North American facilities. This leadership role involves driving long-term growth through the expansion of hazardous waste management capabilities and industrial cleaning services. By aligning corporate objectives with rigorous regulatory compliance standards, Gerstenberg maintains the company's market position as a leader in environmental remediation. The Co-President & Co-Chief Executive Officer collaborates with the Board to optimize resource allocation and sustainability initiatives. Through consistent focus on safety and efficiency, Eric Gerstenberg secures the operational integrity of the entire service portfolio, ultimately fostering trust with government agencies and industrial clients requiring complex environmental solutions.

Michael Battles, the Co-Chief Executive Officer at Clean Harbors, manages the financial health and capital allocation strategies necessary for sustaining large-scale environmental operations. Overseeing fiscal planning and investor relations, the Co-Chief Executive Officer ensures the company maintains the liquidity required for continuous investment in recycling technology and remediation infrastructure. This leadership role involves evaluating market trends to identify opportunities for inorganic growth and service diversification. By monitoring the financial performance of diverse industrial service lines, Battles supports the broader mission of environmental protection and regulatory adherence. The Co-Chief Executive Officer works closely with executive leadership to refine business models that balance profitability with sustainability goals. Through disciplined financial oversight, Michael Battles strengthens the balance sheet, enabling the organization to navigate complex environmental challenges while delivering consistent value to stakeholders across the North American market.

Rebecca Underwood, the President, Facilities at Clean Harbors, manages the physical infrastructure and technical operations of the company's extensive network of treatment, storage, and disposal facilities. Overseeing the daily performance of these critical assets, the President, Facilities ensures that all industrial cleaning, maintenance, and waste processing activities meet stringent environmental safety standards. This leadership role involves coordinating complex logistics for hazardous waste handling and ensuring that every facility operates at peak capacity to support regional demand. By implementing rigorous maintenance protocols, Underwood minimizes downtime and maximizes the throughput of recycling and remediation projects. The President, Facilities works with engineering teams to upgrade technology and improve the environmental footprint of each site. Through direct oversight of facility-level performance, Rebecca Underwood guarantees that the organization maintains its reputation for reliability and compliance while managing the most challenging environmental remediation tasks in the industry.

Jeroen Diderich, the President, Environmental Sales & Service at Clean Harbors, drives the commercial strategy and customer engagement initiatives for the company's comprehensive suite of environmental solutions. Overseeing the sales force and service delivery teams, the President, Environmental Sales & Service identifies new market opportunities for waste collection, emergency spill response, and industrial maintenance. This leadership role involves building long-term partnerships with government agencies and industrial clients to address complex environmental challenges through tailored service packages. By analyzing regional market needs, Diderich ensures that the company's service offerings remain competitive and aligned with evolving regulatory requirements. The President, Environmental Sales & Service collaborates with operational departments to ensure that sales promises translate into high-quality, compliant service execution. Through proactive market development and client relationship management, Jeroen Diderich expands the company's reach, ensuring that clients receive the necessary support for responsible resource management and environmental protection.

Sharon Gabriel, the Executive Vice President & Chief Information Officer at Clean Harbors, architects the digital transformation strategy to modernize waste management and industrial service workflows. Overseeing enterprise-wide technology systems, the Executive Vice President & Chief Information Officer implements data-driven solutions that enhance operational visibility and regulatory reporting accuracy. This leadership role involves securing critical infrastructure against cyber threats while enabling seamless communication across the company's integrated network of facilities. By deploying advanced analytics, Gabriel optimizes logistics for waste transportation and disposal, directly improving service delivery speed. The Executive Vice President & Chief Information Officer collaborates with operational leaders to integrate digital tools into daily maintenance and recycling processes. Through the modernization of internal platforms, Sharon Gabriel drives efficiency gains that support the company's commitment to environmental safety and responsible resource management across all regional operations.