Shannon Marcus

Shannon Marcus serves as Group Chief Executive Officer at Three Rivers Behavioral Health. Three Rivers Behavioral Health operates in the mental health care sector with approximately 170.0 employees. The company is headquartered in Blythewood, South Carolina.

Industry & Role Insights

• • MessageCEO tracks 1,004 executives in the mental health care sector.
• • 567 executive contacts are available in South Carolina.
• • Our database includes 201,469 c suite-level executives.

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Larry Smith Chief Executive Officer at 12&12, Inc.

JD

John Doyle Chief Executive Officer at 610 Solutions, LLC

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Angie Fuqua CEO at ABA Insight, LLC

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Paul Borda CEO & Founding Partner at ABA Therapy Partners

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Lilyan Executive Director | Clinical Director and CEO at ABA Works

Outreach Guidance — mental health care Sector

Executives like Shannon Marcus in the mental health care 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 Three Rivers Behavioral Health.

Shannon Marcus's Position in the MessageCEO Database

• •Shannon Marcus is 1 of 1 verified executive contact we track at Three Rivers Behavioral Health.
• •975 verified executive contacts in mental health care are in the MessageCEO database.
• •552 verified executive contacts in South Carolina are in the database.
• •12 verified contacts work at mental health care companies in the 170.0 employee range (same size as Three Rivers Behavioral Health).

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 We do not publish personal addresses or sensitive identifiers.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 June 2026.

How do I reach Shannon Marcus directly?

Shannon Marcus's verified email address is available to MessageCEO Pro subscribers. They currently serve as Group Chief Executive Officer at Three Rivers Behavioral Health. Access direct contact info to skip gatekeepers and reach the decision maker.

What company does Shannon Marcus work for?

Shannon Marcus is Group Chief Executive Officer at Three Rivers Behavioral Health, a company in the mental health care sector with 170.0 employees. The company is based in Blythewood, South Carolina.

Can I pitch or sell to Shannon Marcus?

As Group Chief Executive Officer at Three Rivers Behavioral Health, Shannon Marcus is a key decision-maker in the mental health care sector. MessageCEO Pro gives you verified email to reach Shannon Marcus directly — ideal for B2B sales, partnerships, and executive recruiting.

What industry is Shannon Marcus in?

Shannon Marcus works in the mental health care industry as Group Chief Executive Officer at Three Rivers Behavioral Health. MessageCEO provides verified contact information for executives across all major industries.

Is Shannon Marcus's contact information verified?

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

Last updated: June 26, 2026