Arthur Kaindl is Head of Varian, where he leads global operations and strategic execution for one of the world’s leading radiation oncology companies. In this role, he oversees Varian’s mission to advance cancer care through integrated technologies spanning radiotherapy, software, and digital solutions, supporting clinicians in delivering more precise and effective cancer treatment worldwide.
Kaindl brings nearly three decades of leadership experience within Siemens and Siemens Healthineers, with a consistent focus on technology-driven growth and digital transformation. Prior to assuming leadership of Varian, he served as Executive Vice President of Magnetic Resonance at Siemens Healthineers, where he oversaw major portfolio expansion and the introduction of new imaging platforms and AI-enabled reconstruction technologies. He previously led Digital Health Services and served as CEO of syngo Imaging Software, strengthening enterprise imaging and IT solutions used across radiology and oncology workflows.
The 100 CEOs featured here reflect the diversity and complexity of modern oncology leadership. In 2025, some lead the world’s largest cancer institutions; others guide specialized societies or emerging innovators. What unites them is responsibility: for millions of patients, for the integrity of science, and for the future direction of cancer care globally.
This list is not a celebration of power, but a recognition of stewardship, accountability, and impact – and of the leaders whose choices continue to shape the fight against cancer. For the many deserving individuals not mentioned in this list, we will continue to acknowledge, honor and elevate your voices in our daily publications from across the world.
See the full list of The 100 Most Influential CEOs in Oncology in 2025, and stay tuned for other special category nominations.
