SEH Executive and Leadership Team

Sam Claassen, the President at SEH, guides the overall strategic direction and operational execution of the firm. Leading SEH's expansive portfolio, Claassen ensures alignment across engineering, architecture, planning, and scientific disciplines to meet client needs in water, wastewater, buildings, infrastructure, environmental, energy, and transportation markets. This executive position involves driving growth, fostering innovation, and upholding the company's commitment to employee ownership and client satisfaction. By directing key business initiatives and overseeing market expansion, Sam Claassen significantly influences SEH's sustained success and its reputation as a leading professional services provider. The focus is on maximizing value for clients and employee-owners alike.

Sandra Harrilal, the President at SEH, spearheads strategic initiatives and operational excellence across the organization. Harrilal's leadership focuses on enhancing SEH's service delivery in critical sectors including water, wastewater, buildings, infrastructure, environmental, energy, and transportation. This role involves cultivating strong client relationships and ensuring the firm's continued growth and market leadership. By driving strategic planning and operational improvements, Sandra Harrilal reinforces SEH's position as a premier employee-owned professional services company. The objective is to deliver exceptional value and innovative solutions to government, industrial, and commercial clients, maintaining the firm's legacy of technical expertise and client trust.

Steven Peterson, the President, Seh Design Build Inc at SEH, directs the integrated design-build services offered by the company. Peterson oversees the seamless execution of projects, combining engineering, architecture, and construction expertise to deliver comprehensive solutions for clients. This leadership position is crucial for managing the complexities of design-build delivery across SEH's core markets, including water, wastewater, buildings, infrastructure, environmental, energy, and transportation. By ensuring efficient project management and high-quality outcomes, Steven Peterson strengthens SEH's capability to provide end-to-end services. The focus remains on optimizing project timelines, costs, and client satisfaction within the design-build framework, reinforcing the firm's comprehensive service offerings.

William Kloster, the Chief Information Officer & Principal at SEH, directs the company's technology strategy and infrastructure. Overseeing all information systems, Kloster ensures robust digital frameworks support SEH's diverse client services in water, wastewater, buildings, infrastructure, environmental, energy, and transportation markets. This leadership role involves managing IT operations, cybersecurity, and digital transformation initiatives critical for an employee-owned, professional services firm. By optimizing technological resources, William Kloster enhances operational efficiency and client data security, directly contributing to the firm's market competitiveness and its ability to deliver complex projects across North America. The Principal designation signifies a key contribution to the firm's strategic direction and ownership.

Jackie Zamorano, the Chief People Officer at SEH, champions the firm's employee-owned culture and talent management strategies. Overseeing human resources functions, Zamorano drives initiatives focused on recruitment, professional development, and employee engagement across SEH's diverse teams of engineers, architects, planners, and scientists. This critical role ensures the cultivation of a supportive and high-performing work environment essential for a professional services company founded in 1927. By fostering talent and reinforcing the employee-ownership model, Jackie Zamorano directly impacts SEH's ability to attract and retain top-tier professionals, thereby strengthening its capacity to serve government, industrial, and commercial clients effectively in the water, wastewater, buildings, infrastructure, environmental, energy, and transportation sectors. The focus remains on building a cohesive and skilled workforce.