Barbara O’Reilly, CFRE, has twenty-five years of fundraising experience at major non-profit organizations including Harvard University, the National Trust for Historic Preservation, Oxford University in England, and the American Red Cross. She has experience developing successful relationships between donors and non-profits through annual funds, capital campaigns, major gifts from high net-worth individuals and corporations, direct mail, and stewardship. 

Throughout her career, she has been part of several key campaigns including the first-ever $1 billion campaign for Harvard University, record-setting reunion campaigns for Harvard Law School, campaign assessment and planning for Oxford University’s Campaign for Sport, and the first-ever capital $125 million campaign for the National Trust for Historic Preservation in 1999. Immediately before becoming a consultant, she served as Director of Development at the National Trust for Historic Preservation in 2008 where she oversaw a Major Gifts team during their $165 million campaign. 

She received her BA in English from Barnard College/Columbia University and her ALM in Celtic Studies from Harvard University. Barbara became a Certified Fundraising Executive (CFRE) in 2015. Barbara believes in doing her part to create a strong nonprofit and fundraising sector through various volunteer roles:

  • Member of the Board of Directors of the Association of Fundraising Professionals (AFP) DC Chapter and serves as Vice President of Resource Development.  
  • Member of the Advisory Panel for Rogare, the University of Plymouth Hartsook Centre for Sustainable Philanthropy’s fundraising think tank.  
  • Partner in Advancement of the Center for Nonprofit Advancement
  • Member of the Association Foundation Group (AFG) and Association of Philanthropic Counsel (APC).
  • Serves as a faculty member of the Catalogue for Philanthropy’s Learning Commons and frequently presents workshops at the Foundation Center and the Center for Nonprofit Advancement in Washington DC.

Windmill Hill Consulting’s mission is building nonprofit excellence through effective fundraising. The firm’s expertise includes planning and directing capital campaigns, identifying and creating major gift relationships with high net-worth individuals and corporate and foundation donors, developing annual fundraising plans and growing annual funds through direct mail and stewardship, training and coaching staff, executive leadership, boards, and other fundraising volunteers. 

In addition to her own portfolio of clients, Barbara is also a Director at Orr Associates, Inc. (OAI) where she has led client teams offering a broad range of fundraising support. 

Past and current clients include:

Past and current clients include: ACMG Foundation for Genetic and Genomic Medicine,* American Red Cross, America’s Charities, The Campagna Center, Center for Disaster Philanthropy, Child Life Council, DC Bar Foundation, The Electrochemical Society, Every Child By Two, Family League of Baltimore,* Global Camps Africa, Greenpeace International, International Center of Shopping Centers Foundation,* In2Books, Kakenya's Dream, National Society of the Colonial Dames of America, Northern Virginia Therapeutic Riding Program, Refugees International, Renown Health Foundation*, Salud por Derecho, The Society of the Cincinnati*, The Washington Area Women’s Foundation*, and Women for Women International.*

*In collaboration with OAI or other consultants


Barbara has that perfect balance of strategic thinking with the ability to dive in and get her hands dirty. She knows how to harness the power of a mission driven organization, develop strong relationships, and craft a compelling case to meld the mission with the people.
— Regine Webster, Vice President, Center for Disaster Philanthropy