About Aileen

Aileen Marquez is a fundraising strategist and nonprofit advisor with more than a decade of experience helping mission-driven organizations strengthen donor relationships, clarify fundraising strategy, and build sustainable development systems.

Through Marquez Giving Strategies, Aileen partners with nonprofits, advocacy organizations, and social impact leaders, offering tailored retainer engagements that provide high-quality fundraising support. Her expertise includes major gifts strategy, donor stewardship, corporate and foundation partnerships, campaign planning, and development infrastructure.

Aileen believes meaningful philanthropy is built on trust, consistency, and authentic relationships rather than transactional tactics. She works with organizational leaders to develop fundraising strategies that drive revenue growth and improve long-term donor engagement and sustainability.

Her experience spans advocacy and civic engagement organizations, arts and culture institutions, environmental nonprofits, and community initiatives. Aileen is recognized for blending strategic insight with practical support, helping organizations shift from reactive fundraising to intentional, sustainable growth.

Based in the Washington, DC area, Aileen brings a relationship-focused and equity-informed perspective to each partnership. She guides organizations to approach fundraising with clarity, confidence, and a long-term vision.