Executive Staff


Dr. Lisa M. Hollier took the role of interim executive vice president (EVP) and CEO on November 1, 2018. As interim EVP and CEO, she oversees the day-to-day operations of ACOG and, with her executive team, provides leadership to more than 200 staff members. She was elected to the office of president in April 2018 and continues to hold that position. 

Dr. Hollier's undergraduate work was completed at Pomona College, and she attended medical school at Tulane University, where she also received a master’s in public health. Following residency training at the Baylor University Medical Center in Dallas, Texas, she completed a fellowship in maternal-fetal Medicine at University of Texas (UT) Southwestern, also in Dallas. Dr. Hollier has been on the academic faculty at UT Southwestern, UT Houston, and Baylor College of Medicine, rising to the rank of professor. In Texas, her roles include chief medical officer for obstetrics and gynecology with Texas Children’s Health Plan and chair of the Texas DSHS Maternal Mortality and Morbidity Task Force.

During her long history of involvement with ACOG, Dr. Hollier has held ACOG District office in Districts VII and XI. She is also past chair of ACOG District XI. Dr. Hollier has served ACOG in a number of other capacities on committees and task forces and was the assistant secretary and president-elect prior to becoming president. Her strategic initiatives as ACOG president focus on reducing preventable maternal mortality. She is a national resource and leader on this subject, which is one of the most serious health issues facing women across the globe. Throughout her career, Dr. Hollier has been dedicated to caring for the underserved and improving women’s health by advancing women’s health policy. 


Erin Hultman, CPA, MST, is ACOG’s chief financial officer, responsible for financial planning, reporting, and risk management. She also oversees ACOG’s investment and endowment portfolios. 

Prior to joining ACOG, Hultman served as the chief financial officer for subsidiaries with the American Society of Clinical Oncology. She also spent over 15 years in public accounting providing audit, tax, and consulting services to a wide range of tax-exempt organizations. She has over 20 years of experience supporting not-for-profit programs and ensuring organizations’ resource allocation aligns with its mission and goals.

Hultman holds a bachelor’s degree in business administration from James Madison University and a master’s degree in taxation from George Mason University. She is a certified public accountant licensed in the state of Virginia.  

Sara N. Kline
Sara Needleman Kline, JD, is the chief legal officer. In this role, Kline advises ACOG on all legal matters affecting the organization and represents ACOG in legal proceedings. Kline joined ACOG’s legal team in 2000 and has served in her current position since 2017. Before joining ACOG, she was a litigation associate at a major District of Columbia law firm and clerked for the Honorable Leonie M. Brinkema of the United States District Court for the Eastern District of Virginia. Kline received her juris doctor from the American University Washington College of Law and received her undergraduate degree from the University of Pennsylvania.

Barbara S. Levy

Dr. Barbara S. Levy is the Vice President, Health Policy and administers ACOG’s Office of Global Women’s Health programs to improve patient safety and quality of women’s health worldwide. Dr. Levy also supervises The Alliance for Innovation on Maternal Health program (AIM), Voluntary Review of Quality of Care, Safety Certification for Outpatient Practice Excellence for Women’s Health, American Indian/Alaska Native Health Program, Health Economics, Strategic Health Care Initiatives department and programs for Maternal Mortality and Fetal & Infant Mortality.  Dr. Levy has been a member of the American Medical Association/Specialty Society Relative Value Scale Update Committee (RUC) since 1999 and in 2015 she completed serving two consecutive terms as Chair of the RUC.  The RUC is an expert panel of volunteer physicians and providers that issues recommendations to CMS regarding the relative work and direct practice expenses required to perform medical services. Before joining ACOG, Dr. Levy was in private ob-gyn practice and medical director of the Women's Health and Breast Center and Women's and Children's Services for the Franciscan Health System in Tacoma, Washington. Recognized in 2015 by Modern Healthcare magazine as one of the 50 Most Influential Physician Executive and Leaders, she has published and co-authored more than 80 studies and articles related to her primary research interests: hysterectomy, endoscopic surgery, pelvic pain, surgical outcomes, and physician payment policy.  Dr. Levy graduated magna cum laude with an undergraduate degree in psychology from Princeton University and received her medical degree from the University of California, San Diego, followed by an internship and residency in ob-gyn at University of Oregon Health Sciences Center (now Oregon Health & Sciences University) in Portland.


Rick Robinson, CPA, MBA, joined ACOG in October 2015 as the inaugural chief operating officer. He sets strategic priorities and refines the organization’s operating structure to deliver those priorities efficiently and effectively. In this role, he also oversees membership, compliance, the Resource Center, and facilities. Prior to his arrival at ACOG, Robinson was a management consultant with PwC, working with Fortune 500 companies in the retail and consumer products sectors such as Nordstrom, Staples, JM Smucker, and 7-Eleven. While there, he led broad, cross-functional teams to refine market strategies and retool key processes, working with a diverse set of stakeholders to create alignment, accountability, and results. Robinson also previously spent over eight years working in health care with The Carter Center in Atlanta, leading finance and administration for its international health programs as they expanded operations in Africa and Latin America. He holds an MBA in finance from the Wharton School at the University of Pennsylvania and is a certified public accountant.

Christopher M. Zahn

Dr. Christopher M. Zahn is the Vice President, Practice Activities. A retired Air Force Officer and member of ACOG’s Armed Forces District, he received his medical degree from Uniformed Services University of the Health Sciences and is a specialist in comprehensive obstetrics and gynecology who has been practicing for 29 years. Before joining ACOG, Dr. Zahn was Professor and Chair of Obstetrics and Gynecology at the Uniformed Services University of the Health Sciences (USUHS), and a staff physician in the Departments of Obstetrics and Gynecology and Pathology at Walter Reed National Military Medical Center in Bethesda, Maryland. He was also the Program Director of the Uniformed Services Residency in Obstetrics and Gynecology, a maximally accredited tri-military Service residency in Obstetrics and Gynecology, under the auspices of the National Capital Consortium at USUHS. Dr. Zahn has also been a member of the ACGME Review Committee for Obstetrics and Gynecology, and is currently a member of the Board of Directors of the American Board of Obstetrics and Gynecology.

American College of Obstetricians and Gynecologists
409 12th Street SW, Washington, DC  20024-2188