Contact Us

Before contacting us, please review our Frequently Asked Questions page.

If you’re a grantseeker, refer to our Grantseekers page.
If your a grantee, refer to our Grantees page.

General Inquiries

For the quickest response, it is recommended that you contact staff by email – instead of by phone or mail.

  • For inquiries (from new applicants), email Kara McCullough. 
  • For inquiries (from past grantee partners) related to DC, MD, NY, and VT, contact Marlene Corrado. 
  • For inquiries (from past grantee partners) related to FL, HI, OH, and TX, contact Kara McCullough. 

For all other inquiries, contact (216) 831-4134.

Our mailing

Attn: William J. and Dorothy K. O’Neill Foundation
2529 Detroit Ave, Suite 126
Cleveland, OH 44113

Help Us Go Paperless!

We’re trying to be kinder to our environment. Please forward all annual reports, newsletters, and other brochures to us electronically at

Communications & Media Guidelines

To help our grantee partners communicate about their grants, we’ve developed a set of guidelines.

Learn more >