Our Leadership & Experts

Managing Partner, Valuation & Strategy

László combines financial modeling with decision science, an applied discipline that unites analytics, statistics, and economics. With nearly two decades of experience advising energy, infrastructure, and resource-intensive companies, he brings a boardroom-caliber track record in navigating pricing, risk, and operational trade-offs. His approach is agile, data-driven, and rooted in real market signals, leveraging proprietary forecasting models and advanced stochastic methods.

As an independent advisor, László supports global consulting firms on complex analytical mandates, model validation, and audit-facing documentation. He is frequently appointed as a designated valuation expert, preparing regulator-ready materials and reviewing high-impact financial models.

His portfolio spans more than 20 global and regional clients, including leading utilities, infrastructure investors, and industrials across Europe and MENA. In addition to delivery, Laszlo leads executive briefings and capability-building programs that empower leadership teams and operational units to embed best-in-class practices in pricing, forecasting, and strategic reporting.

László also designs and delivers training programs, beginning with C-suite briefings and extending to hands-on coaching for operational teams. These programs are praised for clarity, relevance, and engagement. They are delivered across Europe and MENA and help embed consistent analytical standards within client organizations.

Managing Partner, Consumer Products & Food Value Chain 

Ágnes brings over two decades of experience in economic analysis and operational leadership within the consumer products and food value chain. She contributes strategic insight and organizational depth to initiatives that strengthen performance, transparency, and sustainable growth across product development, processing, distribution, and consumer engagement in interconnected global markets, with particular attention to regulatory frameworks, import–export compliance, and market governance.

Partner, International Tax & Restructuring

Katharina is a highly accomplished tax advisor with deep expertise in international taxation, restructuring law, and financial accounting. She combines a strong academic background with extensive professional experience across multinational corporations, auditing, and advisory. Katharina provides strategic tax and financial guidance to companies and investors, helping them navigate complex regulatory environments, manage risk, and build resilient long-term business strategies.

Partner, Legal, Compliance & Risk

Kasper is a seasoned risk and compliance professional with a background in law and more than 30 years of senior management and board-level experience across the global energy markets, energy transition, and decarbonization sectors. He provides strategic advice to government agencies, investment banks, major utilities, commodity trading firms, industrial companies, and international consulting organizations throughout Europe, the Middle East, North America, and Asia.

Partner, Systems & Operational Strategy

With two decades of experience across engineering, finance, and corporate leadership, Balázs focuses on the intersection of business, systems, and technology. He advises clients on operational transformation, technical strategy, and complex system integration, combining deep analytical expertise with practical industry insight. He plays a key role in aligning Siller’s technical capabilities with client growth objectives, ensuring that business strategies are both operationally sound and technologically future-ready.