Mark O'Donnell

Mark O'Donnell serves as President & CEO at Big Brothers Big Sisters of Eastern Massachusetts. Big Brothers Big Sisters of Eastern Massachusetts operates in the nonprofit organization management sector with approximately 150.0 employees. The company is headquartered in Boston, Massachusetts. Big Brothers Big Sisters of Eastern Massachusetts generates annual revenue of 2539000.0.

Industry & Role Insights

• • MessageCEO tracks 5,752 executives in the nonprofit organization management sector.
• • 3,781 executive contacts are available in Massachusetts.
• • Our database includes 201,468 c suite-level executives.

Mimecast Outlook Hubspot The Trade Desk

mentoring non-profit organizations youth development one-to-one relationships community support volunteer opportunities empowerment educational support under-resourced families child safety real-life mentoring stories youth engagement healthy relationships personal growth mentorship programs academic success life skills social skills positive role models community involvement diversity & inclusion non-profit organization impact stories big brother program big sister program youth mentoring career exploration leadership development caring adults children's advocacy college readiness events & engagements mentoring impact relationship building big brothers big sisters mentorship training volunteer information referral programs family involvement community events program models mentoring initiatives stewardship fundraising youth empowerment support services mentoring relationships social responsibility transformational experiences youth mentoring programs nonprofit organization management fund-raising

KC

Kadidia Cooper Chief Financial & Operations Officer at 10,000 Degrees

JA

Julien Ancele Directeur général / CEO at 1001fontaines

LN

Louis Negron Executive Director & Chief Operating Officer at 100 Black Men of Atlanta, Inc.

KG

Karina Guy Chief Executive Officer at 100 Companies that Care

DW

Dom Wood Chief Executive Officer at 1625 Independent People

Outreach Guidance — nonprofit organization management Sector

Executives like Mark O'Donnell in the nonprofit organization management sector receive targeted outreach from sales teams, recruiters, and investors. To stand out, personalize your message with industry-specific context and a clear, specific value proposition relevant to their role at Big Brothers Big Sisters of Eastern Massachusetts.

Mark O'Donnell's Position in the MessageCEO Database

• •Mark O'Donnell is 1 of 1 verified executive contact we track at Big Brothers Big Sisters of Eastern Massachusetts.
• •5,654 verified executive contacts in nonprofit organization management are in the MessageCEO database.
• •3,577 verified executive contacts in Massachusetts are in the database.
• •102 verified contacts work at nonprofit organization management companies in the 150.0 employee range (same size as Big Brothers Big Sisters of Eastern Massachusetts).

Executive contact data compiled from public business filings, LinkedIn public profiles, company press materials, and verified outbound email testing. We do not publish personal addresses or sensitive identifiers. Methodology & sources · Removal requests handled at /remove-info · Updated July 2026.

How do I reach Mark O'Donnell directly?

Mark O'Donnell's verified email address is available to MessageCEO Pro subscribers. They currently serve as President & CEO at Big Brothers Big Sisters of Eastern Massachusetts. Access direct contact info to skip gatekeepers and reach the decision maker.

What company does Mark O'Donnell work for?

Mark O'Donnell is President & CEO at Big Brothers Big Sisters of Eastern Massachusetts, a company in the nonprofit organization management sector with 150.0 employees. The company is based in Boston, Massachusetts.

Can I pitch or sell to Mark O'Donnell?

As President & CEO at Big Brothers Big Sisters of Eastern Massachusetts, Mark O'Donnell is a key decision-maker in the nonprofit organization management sector. MessageCEO Pro gives you verified email to reach Mark O'Donnell directly — ideal for B2B sales, partnerships, and executive recruiting.

What industry is Mark O'Donnell in?

Mark O'Donnell works in the nonprofit organization management industry as President & CEO at Big Brothers Big Sisters of Eastern Massachusetts. MessageCEO provides verified contact information for executives across all major industries.

Is Mark O'Donnell's contact information verified?

Yes. MessageCEO verifies executive contact information through multiple data sources and regular validation checks. Mark O'Donnell's profile is kept up-to-date with the latest available information.

Last updated: July 26, 2026