Jack Diamond

Jack Diamond serves as CEO at Brennan, Manna & Diamond, LLC. Brennan, Manna & Diamond, LLC operates in the law practice sector with approximately 190.0 employees. The company is headquartered in Cleveland, Ohio. Brennan, Manna & Diamond, LLC generates annual revenue of 25000000.0.

Industry & Role Insights

• • MessageCEO tracks 579 executives in the law practice sector.
• • 1,885 executive contacts are available in Ohio.
• • Our database includes 201,468 c suite-level executives.

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Erica Greathouse Chief Technology Officer / CTO / Technology Consultant at Adams Stirling Professional Law Corporation

Outreach Guidance — law practice Sector

Executives like Jack Diamond in the law practice 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 Brennan, Manna & Diamond, LLC.

Jack Diamond's Position in the MessageCEO Database

• •Jack Diamond is 1 of 1 verified executive contact we track at Brennan, Manna & Diamond, LLC.
• •572 verified executive contacts in law practice are in the MessageCEO database.
• •1,794 verified executive contacts in Ohio are in the database.
• •15 verified contacts work at law practice companies in the 190.0 employee range (same size as Brennan, Manna & Diamond, LLC).

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 We do not publish personal addresses or sensitive identifiers.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 Jack Diamond directly?

Jack Diamond's verified email address is available to MessageCEO Pro subscribers. They currently serve as CEO at Brennan, Manna & Diamond, LLC. Access direct contact info to skip gatekeepers and reach the decision maker.

What company does Jack Diamond work for?

Jack Diamond is CEO at Brennan, Manna & Diamond, LLC, a company in the law practice sector with 190.0 employees. The company is based in Cleveland, Ohio.

Can I pitch or sell to Jack Diamond?

As CEO at Brennan, Manna & Diamond, LLC, Jack Diamond is a key decision-maker in the law practice sector. MessageCEO Pro gives you verified email to reach Jack Diamond directly — ideal for B2B sales, partnerships, and executive recruiting.

What industry is Jack Diamond in?

Jack Diamond works in the law practice industry as CEO at Brennan, Manna & Diamond, LLC. MessageCEO provides verified contact information for executives across all major industries.

Is Jack Diamond's contact information verified?

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

Last updated: July 31, 2026