Executive leadership for fundraising, governance, and growth.
Sullivan Consultancy began with a simple idea: leverage William T. Sullivan’s executive experience to drive organizational change—building durable revenue, stronger boards, and systems that scale.
William has led from the inside—as CEO and Executive Director—guiding major campaigns, endowments, and institutional transitions. He’s built development teams, partnered with boards, and grown budgets with a focus on measurable results and long-term sustainability.
That operator’s lens shapes our approach. We align governance with fundraising, translate mission into a compelling case for support, and design practical pipelines—gift tables, moves management, and stewardship—that convert vision into gifts.
We specialize in fundraising strategy and campaigns, major gifts and endowment, board governance and leadership, and data-driven development operations. Every engagement is built to be implemented, measured, and sustained by your team.
If you’re launching a campaign, rebuilding a development shop, or navigating a leadership transition, we’ll help you raise more, govern better, and grow stronger—so your impact lasts.
Meet the team
William T. Sullivan
Founder and Principal