Nexus Water Group Executive and Leadership Team

September, 2026

Leadership Overview

Nexus Water Group has 7 executives leading key functions including strategy, financial oversight, human capital, and regional utility operations.

Focused on delivering sustainable infrastructure, Nexus Water Group provides essential water and wastewater solutions while maintaining a commitment to operational excellence and long-term community health across diverse service territories.

Leadership Roles at Nexus Water Group

  • President & Chief Executive Officer - Rob MacLean
  • Chief Financial Officer - Alison Zimlich
  • President - Mid Atlantic Region - Nathaniel Spriggs
  • President, Canadian Utilities - Darrin Stephanson
  • President, Carolina Water Service, Inc, Carolina (North) - Donald Denton
  • Bu President - Tiffany Van Horn
  • Chief Human Resources Officer - Joanne Elliott
  • Rob MacLean - President & Chief Executive Officer

    Rob MacLean, the President & Chief Executive Officer at Nexus Water Group, directs the overarching corporate strategy for water and wastewater infrastructure. MacLean oversees the alignment of regional utility operations with long-term growth objectives. By managing the executive leadership team, the President & Chief Executive Officer ensures consistent service delivery across all service areas. This role involves constant engagement with the Board to refine capital allocation and operational efficiency. Rob MacLean drives the expansion of utility assets while maintaining strict regulatory compliance. Through the prioritization of sustainable infrastructure investments, the President & Chief Executive Officer secures the operational future of the organization. MacLean maintains a focus on high-level performance metrics to guarantee that the company meets the evolving needs of the communities served. This leadership position requires balancing immediate operational demands with the strategic vision necessary for sustained market presence and infrastructure reliability.
    Rob MacLean

    Alison Zimlich - Chief Financial Officer

    Alison Zimlich, the Chief Financial Officer at Nexus Water Group, manages the financial health and capital structure of the organization. Zimlich oversees all fiscal planning, budgeting, and reporting processes essential for maintaining robust water and wastewater infrastructure. The Chief Financial Officer directs the allocation of resources to support large-scale utility projects and operational maintenance. By analyzing market trends, Alison Zimlich ensures the company maintains a competitive financial position. This role involves close collaboration with the executive team to evaluate the economic viability of new infrastructure investments. The Chief Financial Officer monitors cash flow and debt management to provide the stability required for long-term utility operations. Through rigorous financial oversight, Zimlich supports the strategic goals of the company. This position demands precise management of fiscal assets to ensure that the organization continues to deliver reliable services while achieving sustainable growth and profitability across all operational regions.

    Nathaniel Spriggs - President - Mid Atlantic Region

    Nathaniel Spriggs, the President - Mid Atlantic Region at Nexus Water Group, directs all utility operations within the Mid Atlantic territory. Spriggs oversees the maintenance and expansion of water and wastewater infrastructure to ensure reliable service delivery. The President - Mid Atlantic Region manages regional teams to address technical challenges and regulatory requirements specific to this geographic area. By coordinating with local stakeholders, Nathaniel Spriggs ensures that infrastructure projects meet community needs and environmental standards. This role involves optimizing operational workflows to improve service efficiency and system reliability. The President - Mid Atlantic Region monitors regional performance metrics to drive continuous improvement in utility management. Through the execution of strategic regional plans, Spriggs supports the overall mission of the company. This position requires constant oversight of field operations and capital projects to guarantee that the Mid Atlantic region maintains high standards of service and operational integrity.

    Darrin Stephanson - President, Canadian Utilities

    Darrin Stephanson, the President, Canadian Utilities at Nexus Water Group, directs the operational strategy for all water and wastewater assets located in Canada. Stephanson oversees the management of utility infrastructure to ensure compliance with national and provincial standards. The President, Canadian Utilities coordinates with regional teams to execute capital improvement projects and daily maintenance tasks. By focusing on operational efficiency, Darrin Stephanson drives the delivery of high-quality water services to diverse communities. This role involves navigating the unique regulatory and environmental landscape of the Canadian market. The President, Canadian Utilities manages the integration of new technologies to enhance system performance and reliability. Through the leadership of regional operations, Stephanson ensures that the company meets its service commitments. This position requires a strategic approach to infrastructure management to maintain the long-term viability of utility assets while supporting the broader growth objectives of the organization.

    Donald Denton - President, Carolina Water Service, Inc, Carolina (North)

    Donald Denton, the President, Carolina Water Service, Inc, Carolina (North) at Nexus Water Group, directs the utility operations across the North Carolina service area. Denton oversees the management of water and wastewater systems to ensure consistent service for all customers. The President, Carolina Water Service, Inc, Carolina (North) manages the implementation of infrastructure upgrades and maintenance programs. By focusing on local regulatory compliance, Donald Denton ensures that all operations meet state-mandated quality standards. This role involves coordinating with field teams to address technical issues and improve system performance. The President, Carolina Water Service, Inc, Carolina (North) monitors operational data to optimize resource allocation and service delivery. Through the execution of regional strategies, Denton supports the company's commitment to reliable utility infrastructure. This position requires a dedicated focus on operational excellence to maintain the integrity of water services and support the growth of the company within the North Carolina market.

    Tiffany Van Horn - Bu President

    Tiffany Van Horn, the Bu President at Nexus Water Group, directs the strategic operations of the business unit to ensure alignment with corporate goals. Van Horn oversees the performance of specific utility assets and service delivery models. The Bu President manages the operational budget and resource allocation to drive efficiency within the unit. By analyzing market demand and service requirements, Tiffany Van Horn ensures that the business unit remains competitive and responsive to customer needs. This role involves collaborating with other executive leaders to integrate unit-level strategies into the broader company framework. The Bu President monitors key performance indicators to track progress on infrastructure projects and service quality. Through the leadership of the business unit, Van Horn supports the overall mission of the organization. This position requires a focus on operational agility to address the complexities of water and wastewater management while maintaining high standards of service delivery.

    Joanne Elliott - Chief Human Resources Officer

    Joanne Elliott, the Chief Human Resources Officer at Nexus Water Group, directs the talent acquisition and organizational development strategies. Elliott oversees the cultivation of a skilled workforce capable of managing complex water and wastewater infrastructure systems. The Chief Human Resources Officer designs programs for employee retention, leadership training, and performance management. By fostering a culture of safety and operational excellence, Joanne Elliott ensures that the company attracts top-tier talent in the utility sector. This role involves aligning human capital initiatives with the broader business objectives of the organization. The Chief Human Resources Officer manages compensation structures and benefits to maintain a competitive edge in the labor market. Through the implementation of effective workforce policies, Elliott supports the operational continuity of the company. This leadership position requires a deep understanding of organizational dynamics to ensure that the workforce remains fully equipped to handle the technical challenges inherent in providing essential utility services.

    Explore Leadership Teams in Energy, Utilities & Waste

    Frequently Asked Questions Regarding Nexus Water Group Top Executives and Leadership Team

    Who leads Nexus Water Group?
    Nexus Water Group is led by Rob MacLean (President & Chief Executive Officer), along with executives such as Alison Zimlich (Chief Financial Officer) and Nathaniel Spriggs (President - Mid Atlantic Region).
    Who is part of Nexus Water Group’s executive team?
    The executive team of Nexus Water Group includes leaders such as Rob MacLean (President & Chief Executive Officer), Alison Zimlich (Chief Financial Officer), Nathaniel Spriggs (President - Mid Atlantic Region) and other senior executives.
    How many executives does Nexus Water Group have?
    Nexus Water Group has 7 executives leading key business areas.
    What roles are included in Nexus Water Group’s leadership team?
    The leadership team of Nexus Water Group includes roles such as President & Chief Executive Officer, Chief Financial Officer, President - Mid Atlantic Region, President, Canadian Utilities, President, Carolina Water Service, Inc, Carolina (North).