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Meet Our TEAM
Leadership Team
Marc Brenner
Chief Executive Officer
Marc is an industry expert with over 20 years in the environmental services industry. He has served in leadership roles designing and implementing strategies focused on core values and customer relationships. Marc's valued skillsets include emergency response, disaster recovery, and program development through cross functional teams.
Sam McDonald
Chief Administrative Officer
Sam plays a key role in building and supporting the people, culture and talent that drive Sustain's success. He is focused on creating an engaging employee experience, developing strong leaders and ensuring the organization continues to attract, retain and develop top talent. Sam is passionate about fostering a culture of accountability, collaboration and growth that enables both employees and the company to thrive.
Dan Croghan
Executive Advisor
Dan has more than 30 years of experience in the environmental services industry, including management and executive roles focused on building extensive, national-level customer and supplier relationships. His specialties include delivering hazardous waste solutions for Fortune 500 companies in the chemical, petrochemical, automotive and general manufacturing sectors.
Stephanie Schnovel
Vice President
Stephanie has over 15 years of management and leadership experience in various industries. Her roles focused on company growth initiatives, quality assurance, and operations. Her skillsets include process and procedure development and implementation, strategic planning, cost control, and partnership development.
Les Harold
Vice President, Sales
Les has over 20 years of environmental experience in sales and operations, both with small and large companies. His roles focused on customer relationships, program development, and team leadership. He is driven by meeting the goals and initiatives of our valued customers through superior solutions, transparency, and customized programs.