Leadership Overview
aps has 9 executives leading key functions including operations, information technology, financial strategy, organizational management, revenue generation, and corporate leadership.
Committed to reliable energy delivery, [[aps]] prioritizes sustainable infrastructure development and customer-centric utility solutions across the southwestern United States to power regional economic growth.
Committed to reliable energy delivery, [[aps]] prioritizes sustainable infrastructure development and customer-centric utility solutions across the southwestern United States to power regional economic growth.
Leadership Roles at Arizona Public Service
Joao Dafonsalfredo - Chief Financial Officer
Joao Dafonsalfredo, the Chief Financial Officer at aps, manages the capital allocation strategy and fiscal planning for the organization. Overseeing the financial health of the utility, the Chief Financial Officer directs budgeting processes and long-term investment planning for infrastructure projects. This leadership role involves navigating complex regulatory environments to ensure rate stability and shareholder value. By optimizing the capital structure, Joao Dafonsalfredo supports the funding of renewable energy initiatives and grid modernization efforts. Dafonsalfredo monitors market trends and economic indicators to mitigate financial risks associated with energy commodity price volatility. Through precise financial reporting and transparent communication with stakeholders, the Chief Financial Officer maintains the fiscal discipline required for sustainable growth. Ultimately, Dafonsalfredo secures the necessary capital to expand service capacity, ensuring the utility remains financially robust while delivering essential energy services to the growing population of Arizona.
Andrew Cooper - Senior Vice President & Chief Financial Officer
Andrew Cooper, the Senior Vice President & Chief Financial Officer at aps, oversees the treasury operations and investor relations for the utility. Managing the balance sheet and debt portfolio, the Senior Vice President & Chief Financial Officer ensures the availability of funds for large-scale capital expenditures. This role involves evaluating the financial impact of environmental regulations and energy transition policies on the corporate bottom line. By conducting rigorous financial analysis, Andrew Cooper supports the development of sustainable energy projects that align with long-term growth targets. Cooper coordinates with external auditors and financial institutions to maintain the creditworthiness of the organization. Through the strategic management of cash flow and investment portfolios, the Senior Vice President & Chief Financial Officer mitigates financial exposure and optimizes returns on infrastructure assets. Ultimately, Cooper provides the financial leadership necessary to sustain the utility's commitment to reliable energy delivery and regional economic development.
Jacob Tetlow - Chief Operating Officer
Jacob Tetlow, the Chief Operating Officer at aps, directs all grid reliability initiatives and power generation assets. Managing the daily technical performance of the utility network, the Chief Operating Officer ensures consistent energy delivery across the Arizona service territory. This leadership role involves overseeing large-scale maintenance programs and optimizing the efficiency of power plants to meet peak demand requirements. By integrating advanced grid management technologies, Jacob Tetlow maintains high safety standards and operational excellence throughout the entire energy distribution lifecycle. Tetlow coordinates with engineering teams to modernize infrastructure, ensuring the utility remains resilient against environmental challenges. Through rigorous oversight of field operations and supply chain logistics, the Chief Operating Officer secures the long-term stability of the electrical grid, directly supporting the mission of providing dependable power to residential and commercial customers throughout the region.
Stephen Radnich - President
Stephen Radnich, the President at aps, leads the overall strategic direction and operational performance of the utility. Overseeing the execution of the corporate vision, the President ensures that all business units remain focused on delivering safe and reliable energy to the community. This leadership role involves engaging with policymakers and community stakeholders to advocate for energy policies that support regional growth. By fostering a culture of safety and innovation, Stephen Radnich drives the continuous improvement of operational processes across the organization. Radnich collaborates with the board to set long-term goals for grid modernization and renewable energy integration. Through the effective management of executive talent and resources, the President maintains the competitive position of the utility in the energy market. Ultimately, Radnich directs the company toward a sustainable future, ensuring that the utility meets the evolving energy needs of the state while maintaining high standards of service.
Giuseppe Giliberti - President
Giuseppe Giliberti, the President at aps, manages the regulatory affairs and external relations strategy for the utility. Overseeing the interaction with state commissions and government agencies, the President ensures that the company remains in compliance with all energy regulations. This role involves negotiating rate structures and service agreements that balance the needs of customers with the requirements for infrastructure investment. By building strong relationships with community leaders, Giuseppe Giliberti promotes the utility's commitment to regional development and environmental stewardship. Giliberti directs the implementation of public policy initiatives that facilitate the transition to cleaner energy sources. Through the oversight of legal and compliance functions, the President mitigates regulatory risks and ensures the ethical conduct of all business operations. Ultimately, Giliberti provides the leadership necessary to navigate the complex political landscape, securing the operational freedom required to deliver consistent energy services to the entire service territory.
Ted Geisler - President
Ted Geisler, the President at aps, focuses on the expansion of renewable energy capacity and the integration of sustainable technologies into the existing grid. Overseeing the development of solar and storage projects, the President drives the company's transition toward a cleaner energy portfolio. This leadership role involves managing partnerships with technology providers and construction firms to deliver large-scale energy projects on time and within budget. By prioritizing the adoption of smart grid solutions, Ted Geisler enhances the reliability and efficiency of the energy distribution network. Geisler collaborates with internal engineering teams to ensure that new energy assets meet the highest performance standards. Through the strategic oversight of project development and environmental compliance, the President ensures that the utility meets its sustainability commitments. Ultimately, Geisler leads the effort to modernize the energy infrastructure, positioning the company as a leader in the transition to a sustainable and resilient energy future.

Michelle Ferrara - Chief Information Officer
Michelle Ferrara, the Chief Information Officer at aps, architects the digital transformation strategy for the utility provider. Overseeing cybersecurity protocols and data analytics platforms, the Chief Information Officer protects critical infrastructure from evolving digital threats. This role involves modernizing legacy systems to improve customer billing accuracy and smart meter integration across the state. By implementing cloud-based solutions, Michelle Ferrara enhances the agility of internal business processes and data accessibility for operational teams. Ferrara collaborates with executive leadership to align technology investments with long-term sustainability goals and regulatory compliance requirements. Through the deployment of advanced monitoring software, the Chief Information Officer optimizes grid performance and predictive maintenance capabilities. Ultimately, Ferrara drives the technological innovation necessary to maintain a competitive edge in the energy sector while ensuring the security and integrity of all corporate information assets.

Anna Stewart - Chief of Staff
Anna Stewart, the Chief of Staff at aps, coordinates strategic initiatives and facilitates communication across the executive leadership team. Overseeing the execution of corporate priorities, the Chief of Staff ensures alignment between departmental goals and the overarching mission of the utility. This role involves managing high-level projects that span multiple business units, from regulatory affairs to community engagement. By streamlining decision-making processes, Anna Stewart enhances the efficiency of the executive office and improves organizational agility. Stewart acts as a primary liaison between the board and senior management, ensuring clear communication of strategic objectives. Through the management of internal governance frameworks, the Chief of Staff supports the implementation of long-term operational improvements. Ultimately, Stewart drives organizational cohesion, enabling the leadership team to focus on delivering reliable energy solutions while navigating the complex challenges inherent in the modern utility landscape.
Michael Lee - Chief Revenue Officer, Journey Mechanic
Michael Lee, the Chief Revenue Officer, Journey Mechanic at aps, designs customer experience strategies to optimize revenue streams and service engagement. Overseeing the end-to-end customer journey, the Chief Revenue Officer, Journey Mechanic identifies friction points in the billing and service delivery process. This role involves developing innovative programs that encourage energy efficiency and demand-side management among residential users. By analyzing consumer behavior data, Michael Lee creates targeted outreach campaigns that increase participation in renewable energy initiatives. Lee collaborates with marketing and operations teams to ensure that service offerings align with evolving market demands and regulatory incentives. Through the continuous refinement of the customer interface, the Chief Revenue Officer, Journey Mechanic improves satisfaction scores and long-term loyalty. Ultimately, Lee drives revenue growth by enhancing the value proposition of the utility, ensuring that every customer interaction supports the broader financial and operational objectives of the company.
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