Executive Team

Constantine A. Mantz, MD

Chief Medical Officer / Radiation Oncologist

Dr. Constantine “Connie” Mantz joined 21st Century Oncology in 2000 and has served in his current capacity as Chief Medical Officer since February 2011 and formerly as Senior Vice President of Clinical Operations from March 2009 to February 2011. Dr. Mantz is Board Certified in Radiation Oncology by the American Board of Radiology. At 21st Century Oncology, as an area expert, he leads the company’s focus on the study and treatment of prostate and breast cancer.

Norton L. Travis

Executive Vice President and General Counsel

Norton Travis moved into his current role in 2008 after having served as 21st Century Oncology’s outside general counsel for the prior five years. Presently, Mr. Travis oversees the company’s legal department, working in concert with internal department heads to ensure each operation is consistent and compliant with federal, state and local regulations. He negotiates and implements physician, joint venture, and vendor contracts, mergers and acquisitions, along with working closely with outside counsel.

Eduardo Fernandez, MD, PhD, FACRO

Senior Vice President, Medical Affairs / Medical Director for Latin America / Radiation Oncologist

Dr. Eduardo Fernandez joined 21st Century Oncology in 1998 and has served as the company's Director of Regional Operations and Senior Vice President of Physician Management in the past. In his current role, he is responsible for the oversight and support of the physician, hospital and service provider network strategy. As a Board Certified Radiation Oncologist, Dr. Fernandez also continues to be deeply involved with patient care.

Antoine Agassi

Senior Vice President / Chief Information Officer

Antoine Agassi manages the information technology and computer systems that support 21st Century Oncology’s physician practices and administrative needs. Facilitating secure exchange of information and enhanced quality, safety and efficiency, Mr. Agassi is responsible for implementing processes and practices accompanying the flow of information along with technology infrastructure.

Gary Delanois

Senior Vice President, Multispecialty Operations

Gary Delanois joined 21st Century Oncology in 2009 as Senior Vice President of Multispecialty Operations. With the goal of creating a seamless approach among multiple care specialties, Mr. Delanois facilitates health care integration to provide comprehensive care toward the best individualized treatment plan and best possible outcome for patients.

Kurt Janavitz

Senior Vice President, Payer Contracting and Relations

Kurt Janavitz joined 21st Century Oncology in 2011 as the Senior Vice President of Payer Contracting and Relations. Mr. Janavitz brings more than 20 years of experience in health care finance, strategy, operations and marketing to 21st Century Oncology and has worked extensively on the payer and provider sides of the business.

Karen Mattocks

Vice President, Marketing

Karen Mattocks is responsible for implementing strategies that drive market share growth through the development of the company’s physician liaison team, as well as traditional marketing and communications. With more than 30 years of experience in the medical and marketing fields, Ms. Mattocks is well-equipped to lead all strategic planning and marketing management initiatives for 21st Century Oncology.

Ricardo Andisco

Director of Projects

Ricardo Andisco joined the 21st Century Oncology team in 1998. As the Director of Projects, he is an integral part of the development team leading the company’s growth both domestically and abroad. Mr. Andisco oversees and actively coordinates a large group of architects as well as engineers to develop turnkey medical centers. With over 30 years of experience in design and construction, he has overseen more than 100 projects since joining the company.