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Michael Zelefsky
Director/Board Member at
MUSTANG BIO, INC.
Net worth: 254 $ as of 2026-05-30
Profile
Michael J.
Zelefsky is currently an Independent Director at Mustang Bio, Inc. since 2017, Director of Genitourinary Radiation Oncology at NYU Langone Hospitals since 2023, and Professor of Radiation Oncology at Weill Cornell Medical College since 1994.
Formerly, Dr. Zelefsky was President of the American Brachytherapy Society and a Member at Memorial Sloan Kettering Cancer Center from 2005 to 2023.
Dr. Zelefsky completed undergraduate studies at Yeshiva University in 1982 and earned a doctorate from Albert Einstein College of Medicine, Inc. in 1986.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
MUSTANG BIO, INC. 0.01% | 2025-11-17 | 379 ( 0.01% ) | 254 $ | 2026-05-30 |
Michael Zelefsky active positions
| Companies | Position | Start |
|---|---|---|
| MUSTANG BIO, INC. | Director/Board Member | 2017-06-06 |
Weill Cornell Medical College
 Weill Cornell Medical College Other Consumer ServicesConsumer Services Functions as a College/University | Corporate Officer/Principal | 1993-12-31 |
NYU Langone Hospitals
 NYU Langone Hospitals Hospital/Nursing ManagementHealth Services Owns and operates hospitals | Corporate Officer/Principal | 2022-12-31 |
Former positions of Michael Zelefsky
| Companies | Position | End |
|---|---|---|
Memorial Sloan Kettering Cancer Center
 Memorial Sloan Kettering Cancer Center Hospital/Nursing ManagementHealth Services Operates cancer hospital | Corporate Officer/Principal | 2022-12-31 |
American Brachytherapy Society
 American Brachytherapy Society The American Brachytherapy Society is a professional organization dedicated to advancing brachytherapy, a form of internal radiation therapy used primarily to treat cancers such as prostate, cervical, and breast. The non-profit company is based in Reston, VA. The society promotes standards, education, training, research, and patient safety initiatives to improve outcomes and quality of life. It serves a multidisciplinary membership including physicians, medical physicists, nurses, radiation therapists, residents, fellows, and dosimetrists. The organization provides resources such as patient information, consensus guidelines, a peer-reviewed journal, podcasts, webinars, and educational events. It supports professional development through fellowship programs, brachytherapy schools, and networking opportunities, and maintains a code of ethics and a board of directors. The society fosters patient safety by sharing best practices, safety updates, and case studies, and encourages member involvement in quality and safety initiatives. It facilitates industry partnerships and provides a platform for sharing research and clinical expertise. | President | - |
Training of Michael Zelefsky
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
85
1st degree connections
7
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 7 |
|---|---|
Yeshiva University
 Yeshiva University Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Memorial Sloan Kettering Cancer Center
Memorial Sloan Kettering Cancer Center Hospital/Nursing ManagementHealth Services Operates cancer hospital | Health Services |
Weill Cornell Medical College
Weill Cornell Medical College Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Albert Einstein College of Medicine, Inc.
 Albert Einstein College of Medicine, Inc. Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
NYU Langone Hospitals
NYU Langone Hospitals Hospital/Nursing ManagementHealth Services Owns and operates hospitals | Health Services |
American Brachytherapy Society
American Brachytherapy Society The American Brachytherapy Society is a professional organization dedicated to advancing brachytherapy, a form of internal radiation therapy used primarily to treat cancers such as prostate, cervical, and breast. The non-profit company is based in Reston, VA. The society promotes standards, education, training, research, and patient safety initiatives to improve outcomes and quality of life. It serves a multidisciplinary membership including physicians, medical physicists, nurses, radiation therapists, residents, fellows, and dosimetrists. The organization provides resources such as patient information, consensus guidelines, a peer-reviewed journal, podcasts, webinars, and educational events. It supports professional development through fellowship programs, brachytherapy schools, and networking opportunities, and maintains a code of ethics and a board of directors. The society fosters patient safety by sharing best practices, safety updates, and case studies, and encourages member involvement in quality and safety initiatives. It facilitates industry partnerships and provides a platform for sharing research and clinical expertise. | |
Mustang Bio, Inc.
 Mustang Bio, Inc. Pharmaceuticals: MajorHealth Technology Operates as clinical-stage biopharmaceutical company which develops novel immunotherapy''s | Health Technology |
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