Marc Sumner

Marc Sumner serves as CEO at Robertson Sumner. Robertson Sumner operates in the staffing & recruiting sector with approximately 29.0 employees. The company is headquartered in London, England. Robertson Sumner generates annual revenue of 7000000.0.

Industry & Role Insights

• • MessageCEO tracks 2,963 executives in the staffing & recruiting sector.
• • We have verified contacts for 2 executives at Robertson Sumner.
• • 10,137 executive contacts are available in England.
• • Our database includes 201,468 c suite-level executives.

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AM

Antony Meek Chief Operating Officer at Robertson Sumner

JC

Joe Coletta CEO at 180 Engineering

RK

Ryan Kevelighan Chief Executive Officer at 1Medical

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Prateek Upadhyay Chief Operating Officer at 1 POINT SYSTEM LLC

LH

Larry Hayes Chief Executive Officer at 24HourNurse, LLC

Outreach Guidance — staffing & recruiting Sector

Executives like Marc Sumner in the staffing & recruiting 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 Robertson Sumner.

Marc Sumner's Position in the MessageCEO Database

• •Marc Sumner is 1 of 2 verified executive contacts we track at Robertson Sumner.
• •2,902 verified executive contacts in staffing & recruiting are in the MessageCEO database.
• •10,040 verified executive contacts in England are in the database.
• •54 verified contacts work at staffing & recruiting companies in the 29.0 employee range (same size as Robertson Sumner).

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 We do not publish personal addresses or sensitive identifiers.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 Marc Sumner directly?

Marc Sumner's verified email address is available to MessageCEO Pro subscribers. They currently serve as CEO at Robertson Sumner. Access direct contact info to skip gatekeepers and reach the decision maker.

What company does Marc Sumner work for?

Marc Sumner is CEO at Robertson Sumner, a company in the staffing & recruiting sector with 29.0 employees. The company is based in London, England.

Can I pitch or sell to Marc Sumner?

As CEO at Robertson Sumner, Marc Sumner is a key decision-maker in the staffing & recruiting sector. MessageCEO Pro gives you verified email to reach Marc Sumner directly — ideal for B2B sales, partnerships, and executive recruiting.

What industry is Marc Sumner in?

Marc Sumner works in the staffing & recruiting industry as CEO at Robertson Sumner. MessageCEO provides verified contact information for executives across all major industries.

Is Marc Sumner's contact information verified?

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

Last updated: July 27, 2026