Carylon Executive and Leadership Team

July, 2026

Leadership Overview

Carylon has 5 executives leading key functions including strategy, technology, human resources, and operations.

Driving environmental infrastructure maintenance, Carylon is dedicated to providing specialized services in sewer and water system upkeep, alongside soil and sludge remediation, ensuring the nation's critical systems operate efficiently and sustainably.

Leadership Roles at Carylon

  • Chief Executive Officer - Marcie Hemmelstein
  • President - Dennis Sullivan
  • President - Howard Harris
  • Chief Technology Officer - Jeremy Lapon
  • Chief People Officer - Hector Aponte
  • Marcie Hemmelstein - Chief Executive Officer

    Marcie Hemmelstein, the Chief Executive Officer at Carylon, directs the overarching corporate strategy and operational framework for the national organization. Hemmelstein guides the integration of regional operating companies, ensuring cohesive service delivery across specialized areas like sewer system maintenance, water supply upkeep, and soil/sludge remediation. This leadership role involves setting the vision for environmental infrastructure preservation and driving initiatives that enhance the company's market position. By fostering a culture of excellence and accountability, Marcie Hemmelstein ensures that Carylon consistently meets the complex demands of maintaining essential public utilities. The Chief Executive Officer's focus remains on sustainable growth and expanding the company's impact on environmental health nationwide.

    Dennis Sullivan - President

    Dennis Sullivan, the President at Carylon, spearheads operational execution and drives service excellence across the company's diverse portfolio of environmental maintenance services. Sullivan focuses on optimizing the performance of regional operating companies, ensuring seamless delivery of specialized solutions for sewer system maintenance, water supply upkeep, and soil/sludge remediation. This executive role involves enhancing operational efficiencies and implementing best practices that uphold Carylon's commitment to environmental infrastructure preservation. By fostering strong relationships with stakeholders and managing key operational initiatives, Dennis Sullivan ensures the company's continued success. The President's leadership is vital for maintaining the high standards of service and reliability that define Carylon's national presence.

    Howard Harris - President

    Howard Harris, the President at Carylon, directs strategic growth initiatives and expands the company's service offerings in environmental infrastructure maintenance. Harris focuses on identifying new market opportunities and strengthening Carylon's position in specialized services such as sewer system maintenance, water supply upkeep, and soil/sludge remediation. This executive role involves overseeing business development efforts and ensuring the effective integration of new technologies and operational strategies. By driving innovation and fostering collaborative partnerships, Howard Harris enhances Carylon's capacity to address complex environmental challenges. The President's strategic vision is instrumental in advancing the company's mission to maintain and improve critical environmental systems nationwide.

    Jeremy Lapon - Chief Technology Officer

    Jeremy Lapon, the Chief Technology Officer at Carylon, architects the technological roadmap and oversees all innovation efforts critical to environmental infrastructure maintenance. Lapon drives the adoption of advanced technologies for sewer system maintenance, water supply upkeep, and soil/sludge remediation, enhancing operational efficiency and service quality. This executive champions digital transformation, ensuring Carylon's regional operating companies leverage cutting-edge solutions for complex environmental challenges. By integrating smart systems and data analytics, Jeremy Lapon improves predictive maintenance capabilities and resource management across the organization. The Chief Technology Officer's mandate includes exploring new technological frontiers to further Carylon's mission of preserving vital environmental systems.

    Hector Aponte - Chief People Officer

    Hector Aponte, the Chief People Officer at Carylon, shapes the human capital strategy and cultivates a high-performance culture across the national organization. Aponte oversees talent acquisition, development, and retention programs, ensuring Carylon attracts and retains skilled professionals essential for specialized services in environmental infrastructure. This leadership position involves fostering employee engagement and promoting a safe, inclusive work environment that supports the demanding nature of sewer system maintenance and water supply upkeep. By aligning HR initiatives with business objectives, Hector Aponte strengthens the organizational capacity to deliver exceptional service. The Chief People Officer's efforts are crucial for maintaining the operational excellence required in soil/sludge remediation and broader environmental infrastructure management.

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    Frequently Asked Questions Regarding Carylon Top Executives and Leadership Team

    Who leads Carylon?
    Carylon is led by Marcie Hemmelstein (Chief Executive Officer), along with executives such as Dennis Sullivan (President) and Howard Harris (President).
    Who is part of Carylon’s executive team?
    The executive team of Carylon includes leaders such as Marcie Hemmelstein (Chief Executive Officer), Dennis Sullivan (President), Howard Harris (President) and other senior executives.
    How many executives does Carylon have?
    Carylon has 5 executives leading key business areas.
    What roles are included in Carylon’s leadership team?
    The leadership team of Carylon includes roles such as Chief Executive Officer, President, President, Chief Technology Officer, Chief People Officer.