Skip to main content

Executive Team

Meet The Leukemia & Lymphoma Society's Executive Team

Executive Team

Meet The Leukemia & Lymphoma Society's Executive Team

Louis J. DeGennaro, Ph.D.

Louis J. DeGennaro, Ph.D.

President and Chief Executive Officer

Louis J. DeGennaro, Ph.D., is president and chief executive officer of The Leukemia & Lymphoma Society (LLS), a global leader in the fight against cancer. Dr. DeGennaro leads the mission and operations of this $400 million cancer patient advocacy agency with headquarters in Rye Brook, New York.

Dr. DeGennaro has been a member of the LLS executive leadership team since he joined LLS as chief scientific officer in 2005. He was named LLS chief mission officer in 2009, with responsibility for leadership of all of LLS's mission functions, including research, patient education and support, public policy and advocacy. He was named president and CEO in September 2014.

As the key architect of LLS's cures and access agenda, Dr. DeGennaro conceived and pioneered LLS’s Therapy Acceleration Program® - a venture philanthropy approach to accelerating new treatments to patients through drug discovery and development partnerships with the biotechnology industry. LLS’s foray into venture philanthropy helped redefine the activist role of nonprofits to meet urgent unmet medical needs.  Under Dr. DeGennaro’s leadership LLS launched its groundbreaking precision medicine Beat AML® Master Trial in October 2016, leading the offensive against acute myeloid leukemia, one of the most deadly blood cancers. 

Dr. DeGennaro has devoted his career to saving lives through drug discovery – first in academic research, later directing drug development at several pharmaceutical companies. At LLS he has found the perfect intersection of science and patient care, overseeing the funding of cutting-edge research, supporting patients and engaging in patient advocacy work. In addition to providing leadership and vision for his staff, he is committed to keeping a significant constituency of volunteers motivated and dedicated to the organization.

After receiving his doctorate in biochemistry from the University of California at San Francisco, Dr. DeGennaro did his post-doctoral research at the Yale University School of Medicine.  His previous academic appointments include research group leader, Max Planck Institute in Munich, Germanyand associate professor of neurology and cell biology, University of Massachusetts Medical School.  His previous private sector appointments included Senior Director, Molecular Genetics, Wyeth Pharmaceuticals and Executive Vice President, Synex Pharmaceuticals.

Troy Photo

Troy Dunmire

EVP, Chief Operating Officer

As chief operating officer, Troy Dunmire provides operations oversight and leadership for key LLS business units including Field Operations, Information Technology, Advancement, Corporate Development, Campaigns, Marketing and Communications. He is responsible for leading all operational activities and implementing an overall finance and expense management strategy aligned with LLS’s strategic business plan. He works closely with the cross-functional senior leadership team, primarily to assess strategic growth on LLS’s operating plan.

Dunmire comes to LLS after more than 20 years at Gap Inc., having served in multiple roles and functions across Gap, Old Navy and Banana Republic. In his most recent position as senior vice president of stores, his purview included oversight of 750 stores across the United States and Canada with revenue in excess of $2 billion. Throughout his career, he’s developed and executed comprehensive business and operating strategies across staff, customers and stores, leading to top-line sales and gross margin improvements.

Dunmire has a bachelor’s degree in marketing from University of South Florida, where he currently serves as a member of the alumni association board of directors. 

JR Miller Photo

JR Miller

EVP, Chief Financial Officer

As chief financial officer, JR ensures that LLS achieves the ambitious financial goals of its long-range strategic plan. Miller leads the finance organization and risk management and is responsible for enhancing LLS's financial efficiency and effectiveness in partnership with the organization's executive team. 

Throughout his 20-year tenure at LLS, Miller served as a regional vice president, overseeing ten chapters across the U.S., and as vice president of field operations, in which he was responsible for management of LLS Canada. From 2015 to 2018, Miller served as CEO of PearlPoint, an online service that provides nutritional support for cancer patients, which he has since integrated into LLS’s family of patient support services.

Prior to joining LLS, Miller was in corporate accounting with David C. Cook, a nonprofit publishing company, and an internal auditor for Farm Family Insurance Companies.

Miller holds a bachelor’s degree in accounting from Gordon College and is a member of the American Institute of Certified Public Accountants.

Gwen Nichols Photo

Gwen Nichols, MD

EVP, Chief Medical Officer

As LLS’s chief medical officer (CMO), Gwen Nichols, M.D., plays a critical role in advancing cures through a unique combination of clinical, academic and pharmaceutical experience. She oversees LLS’s scientific research portfolio, patient services and policy and advocacy initiatives. A physician and scientific researcher, she has dedicated her career to advancing cures for cancers.

Most recently, Dr. Nichols was oncology site head of the Roche Translational Clinical Research Center, where she worked to develop new cancer therapies, translating them from the laboratory to clinical trials. Prior to joining Roche in 2007, Dr. Nichols was at Columbia University for more than ten years, where she served as the director of the Hematologic Malignancies Program.

While at Columbia University, Dr. Nichols maintained an active clinical practice and received the prestigious honors of “Physician of the Year” from Columbia University and the “Humanism in Medicine Award” from the American Association of Medical Colleges.

Dr. Nichols trained in internal medicine at the University of Chicago and completed post-doctoral research and a hematology-oncology fellowship at Memorial Sloan-Kettering Cancer Center where she was an attending physician. She received her medical degree with honors from the State University of New York at Buffalo.

Dale Photo

Dale Nissenbaum

EVP, General Counsel

As general counsel, Dale Nissenbaum is responsible for legal strategy and compliance, and supports LLS’s National Board of Directors in developing and maintaining best practices in governance policies and procedures.

Nissenbaum brings to LLS more than 20 years of in-house and corporate law firm legal experience. Since 2012, she served as general counsel for Brunswick Group, LLC, a global communications firm, where she served as a strategic partner and advisor to senior leadership on legal and business issues. Nissenbaum has extensive experience in complex business transactions, critical contract negotiations, business strategy development and litigation.

Nissenbaum has a bachelor’s degree in history and political science from University of Pennsylvania and earned her Juris Doctor degree from Columbia University School of Law.


Tom Osgood

EVP, Chief Human Resources Officer

As chief human resources officer, Tom Osgood is responsible for the direction and management of all human resources functions across LLS. He leads multiple strategic initiatives, including organization development, change management, and enterprise-wide talent management and leadership development programs and processes. In addition, Osgood is responsible for driving the transformation of LLS’s culture, specifically in the areas of performance management and employee engagement.

Prior to joining LLS, Osgood was managing partner, K. Russo Consulting, Inc., where he provided strategic search and HR consulting services, with a focus on being a trusted adviser and business partner. His experience also includes chief human resources officer for Cannondale Sports Unlimited, a $1B bicycle and apparel company, with 2,100 worldwide employees, and prior to that was vice president of global human resources for Avon products, Inc.

Osgood earned his master’s degree in organizational development from Columbia University and his bachelor’s degree in management from Binghamton University.