At Source Philanthropy, I specialize in clear, compelling grant writing that helps nonprofits secure the funding they need to grow. With years of experience across housing, legal services, the arts, and community development, I understand how to translate impact into language that funders trust. I work closely with clients to streamline the grant process, eliminate guesswork, and free up their time for what matters most: doing the real work. Whether you're navigating your first grant or scaling a seasoned program, I'm here to help you tell your story—and get funded.
What We Do
Grant writing is just the beginning. Our services include:
We work on a project basis, hourly retainers, or in long-term partnerships—whatever meets your needs best.
Dennis Marion is an experienced grant writer and fundraising strategist with over a decade of success helping nonprofits grow their impact. He has partnered with organizations across the legal aid, affordable housing, education, and arts sectors, combining strategic expertise with a deep commitment to mission-driven work. Dennis founded Source Philanthropy to deliver smart, soulful support to nonprofits of all sizes
I’m proud to partner with nonprofits doing the real work—serving communities, expanding access, and changing lives. From grassroots organizations to growing regional leaders, I help teams across sectors unlock the funding they need to scale their impact.
Selected Clients:
Housing & Community Development
Greater Middlesex & Morris Habitat for Humanity
Josephine’s Place
Legal Aid & Justice Access
Timpanogos Legal Center
Sustainable Agriculture & Environment
Momentum AG
Arts & Culture
Katonah Museum of Art
This list reflects current and past collaborations. For confidentiality reasons, not all client names are listed.
Have a grant deadline coming up? Need support planning your fundraising year? We’d love to hear more about your goals.
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