Quinbrook Appoints Brian Restall As Global CEO

In a strategic move aimed at reinforcing its executive leadership and driving continued global expansion, Quinbrook Infrastructure Partners, a prominent investor in the energy transition space, has announced a significant reshuffle of its top leadership team. Central to the announcement is the appointment of Brian Restall to the newly created role of Global Chief Executive Officer (CEO), marking a pivotal milestone for the firm as it embarks on its second decade of operations.

The creation of the CEO role and the subsequent appointment of Restall signal Quinbrook’s intention to enhance coordination across its regional platforms in North America, Europe, and Australia, aligning with the company’s long-term vision of being a value-add leader in the energy transition sector. The firm has also elevated Giulia Siccardo to the role of Managing Director and Regional Leader for North America, and Kathryn Lin to the position of Senior Director, where she will head Quinbrook’s digital infrastructure strategies.

Brian Restall, who has been with Quinbrook since its founding in 2015, has played a key role in shaping the company’s strategy and operations over the past decade. Until recently, he served as the firm’s Australian Regional Leader and sat on both the Global Investment Committee and the Global Procurement Committee as Chair. In his new position as Global CEO, Restall will take on comprehensive leadership responsibilities for all of Quinbrook’s regional teams and investment activities. His mandate includes guiding the company through its next phase of growth by reinforcing operational cohesion, driving innovation, and strengthening stakeholder engagement across its diverse markets.

Restall’s deep institutional knowledge and long-standing involvement with the firm are expected to bring stability and a forward-looking perspective to Quinbrook’s global operations. With his experience spanning infrastructure development, procurement, and investment strategy, he is seen as ideally suited to lead Quinbrook as it scales its portfolio of energy transition assets.

Joining the leadership team is Giulia Siccardo, who steps into the role of Managing Director and Regional Leader for North America. Siccardo brings a unique background in clean energy supply chains and manufacturing, having previously served as the first-ever Director of Manufacturing and Energy Supply Chains at the U.S. Department of Energy in Washington, D.C. Her government experience is expected to strengthen Quinbrook’s positioning in policy-driven markets and deepen the firm’s capabilities in industrial and clean energy investment strategies.

Kathryn Lin has also been promoted to a senior leadership role, becoming Senior Director and Head of Digital Infrastructure Strategies. Lin joined Quinbrook in 2023 as a Director in the North American investment team and quickly emerged as a key contributor to the firm’s strategy in digital energy solutions. In her new capacity, Lin will oversee initiatives that integrate renewable energy with data infrastructure—a space that is increasingly critical as digitalization drives demand for sustainable power solutions.

These executive changes come at a moment of expansion for Quinbrook, which has steadily grown its influence in the energy transition landscape by investing in next-generation infrastructure across renewables, storage, grid services, and sustainable data centers. The company’s focus on value creation and sustainability has positioned it as a major player in the shift toward decarbonized energy systems.

In a statement reflecting on the changes, David Scaysbrook, Co-founder and Managing Partner of Quinbrook, emphasized the importance of strategic leadership as the firm scales its impact globally. “As Quinbrook grows, we have been working to establish a leadership structure that further empowers our people to lead our firm into its second decade and beyond. As Co-Founders, Rory and I are proud of what we’ve built together since establishing the firm in 2015. We believe this new leadership structure equips Quinbrook with exceptionally talented leaders as we continue our journey as a value-add specialist in the energy transition,” Scaysbrook said.

The reorganization also reflects broader trends within the clean energy investment sector, where firms are increasingly adapting to a more complex and dynamic global landscape. As governments, corporations, and investors accelerate their decarbonization goals, firms like Quinbrook are evolving their internal structures to meet rising demand and ensure effective execution of projects at scale.

With Restall at the helm and a strengthened leadership team in place, Quinbrook is poised to navigate the challenges and opportunities of the next decade. The firm’s leadership believes that this new structure will not only enhance regional decision-making but also foster cross-border synergies and innovation, ultimately driving better outcomes for investors and communities alike.

As Quinbrook advances its mission to build resilient and sustainable energy systems, the newly announced leadership appointments are set to play a central role in steering the firm through its next chapter—one defined by accelerated growth, deeper market penetration, and a steadfast commitment to the global energy transition.