Leadership Overview
Arizona Public Service has 6 executives leading key functions including operations, financial strategy, revenue generation, and organizational leadership.
Committed to delivering reliable power across the region, Arizona Public Service prioritizes grid modernization and sustainable energy solutions to support the growing needs of 1.4 million customers throughout the state.
Committed to delivering reliable power across the region, Arizona Public Service prioritizes grid modernization and sustainable energy solutions to support the growing needs of 1.4 million customers throughout the state.
Leadership Roles at Arizona Public Service
Joao Dafonsalfredo - Chief Financial Officer
Joao Dafonsalfredo, the Chief Financial Officer at Arizona Public Service, manages the financial health and capital allocation strategies for the utility. Overseeing fiscal planning and regulatory reporting, the Chief Financial Officer ensures the company maintains the necessary liquidity to fund large-scale grid infrastructure projects. This leadership role involves balancing the costs of renewable energy investments with the requirement for affordable customer rates. By analyzing market trends and economic indicators, Joao Dafonsalfredo drives financial stability and long-term growth for the organization. Dafonsalfredo collaborates with the Board to secure funding for innovative energy solutions and grid upgrades. Through disciplined budget management and risk assessment, the Chief Financial Officer protects the financial interests of the utility while supporting the transition to a cleaner energy portfolio. This strategic financial oversight remains essential for maintaining the operational scale required to serve 1.4 million customers across the diverse Arizona landscape.
Jacob Tetlow - Chief Operating Officer
Jacob Tetlow, the Chief Operating Officer at Arizona Public Service, directs all daily utility operations and grid maintenance activities. Overseeing the transmission and distribution infrastructure, the Chief Operating Officer ensures the delivery of safe and reliable electricity to homes and businesses across the state. This leadership role involves managing complex engineering projects and optimizing grid performance to meet increasing energy demands. By implementing advanced technology and safety protocols, Jacob Tetlow maintains high operational standards across the entire service territory. Tetlow coordinates with the broader executive team to align infrastructure investments with long-term sustainability goals. Through rigorous oversight of field operations and maintenance schedules, the Chief Operating Officer minimizes service interruptions and enhances overall system resilience. This focus on operational excellence supports the core mission of providing affordable energy while transitioning toward cleaner, more efficient power generation methods for the entire Arizona region.
Giuseppe Giliberti - President
Giuseppe Giliberti, the President at Arizona Public Service, leads the strategic direction and corporate governance of the utility. Overseeing the alignment of business units with the company mission, the President ensures that all departments contribute to the delivery of safe and reliable electricity. This leadership role involves managing stakeholder relationships and navigating the complex regulatory environment governing energy distribution. By fostering a culture of innovation and safety, Giuseppe Giliberti drives the company toward achieving long-term sustainability goals. Giliberti coordinates with other executive leaders to prioritize investments in renewable resources and grid infrastructure. Through active engagement with community leaders and regulatory bodies, the President shapes the future of energy delivery across the state. This executive oversight ensures that the utility remains responsive to the needs of 1.4 million customers while maintaining a strong focus on operational efficiency and the transition to cleaner energy sources.
Stephen Radnich - President
Stephen Radnich, the President at Arizona Public Service, directs the organizational strategy and internal policy development for the utility. Overseeing the execution of corporate initiatives, the President ensures that the company maintains its commitment to providing affordable and reliable power. This leadership role involves managing cross-functional teams to improve grid performance and customer service delivery. By championing technological advancements and infrastructure upgrades, Stephen Radnich drives the modernization of the energy network across the region. Radnich collaborates with the executive team to address the challenges of a growing population and the increasing demand for clean energy solutions. Through strategic planning and resource allocation, the President supports the company's mission to provide sustainable energy to homes and businesses. This leadership focus ensures that the utility remains a reliable partner for the state, balancing the immediate needs of the grid with the long-term requirements of a sustainable energy future.
Ted Geisler - President
Ted Geisler, the President at Arizona Public Service, manages the external affairs and public policy engagement for the utility. Overseeing the company's interactions with government agencies and community organizations, the President ensures that the utility's strategic goals align with public interest and regulatory requirements. This leadership role involves advocating for policies that support grid reliability and the expansion of renewable energy resources. By building strong partnerships with regional stakeholders, Ted Geisler drives the company's efforts to provide clean and affordable energy to all customers. Geisler works with the executive team to communicate the value of infrastructure investments and the importance of a resilient energy grid. Through proactive engagement and transparent communication, the President strengthens the company's reputation and supports its mission to serve 1.4 million customers. This focus on external relations and policy advocacy is critical for navigating the evolving energy landscape and ensuring long-term success.

Michael Lee - Chief Revenue Officer, Journey Mechanic
Michael Lee, the Chief Revenue Officer, Journey Mechanic at Arizona Public Service, architects revenue growth strategies and customer engagement initiatives. Overseeing the development of new service models, the Chief Revenue Officer, Journey Mechanic ensures that energy offerings align with evolving consumer needs and market expectations. This leadership role involves identifying opportunities for service expansion and optimizing the customer experience across the entire Arizona service area. By analyzing usage patterns and demand-side management, Michael Lee drives initiatives that increase efficiency and customer satisfaction. Lee works closely with the operations team to integrate new energy solutions into the existing distribution network. Through the implementation of innovative pricing structures and service programs, the Chief Revenue Officer, Journey Mechanic secures sustainable revenue streams for the utility. This focus on customer-centric growth supports the broader mission of providing reliable and affordable power while adapting to the changing energy landscape of the region.
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