John Leslie

John Leslie serves as CTO at Ellumen. Ellumen operates in the information technology & services sector with approximately 130.0 employees. The company is headquartered in Washington, District of Columbia. Ellumen generates annual revenue of 11330000.0.

Industry & Role Insights

• • MessageCEO tracks 50,503 executives in the information technology & services sector.
• • 1,800 executive contacts are available in District of Columbia.
• • Our database includes 201,468 c suite-level executives.

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Outreach Guidance — information technology & services Sector

Technology executives make decisions on infrastructure, tooling, and partnerships. When reaching out to John Leslie, lead with your value proposition relative to the stack they currently use. Generic pitches perform poorly; specific technical relevance is key.

John Leslie's Position in the MessageCEO Database

• •49,754 verified executive contacts in information technology & services are in the MessageCEO database.
• •1,687 verified executive contacts in District of Columbia are in the database.
• •1,020 verified contacts work at information technology & services companies in the 130.0 employee range (same size as Ellumen).

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 We do not publish personal addresses or sensitive identifiers.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 John Leslie directly?

John Leslie's verified email address is available to MessageCEO Pro subscribers. They currently serve as CTO at Ellumen. Access direct contact info to skip gatekeepers and reach the decision maker.

What company does John Leslie work for?

John Leslie is CTO at Ellumen, a company in the information technology & services sector with 130.0 employees. The company is based in Washington, District of Columbia.

Can I pitch or sell to John Leslie?

As CTO at Ellumen, John Leslie is a key decision-maker in the information technology & services sector. MessageCEO Pro gives you verified email to reach John Leslie directly — ideal for B2B sales, partnerships, and executive recruiting.

What industry is John Leslie in?

John Leslie works in the information technology & services industry as CTO at Ellumen. MessageCEO provides verified contact information for executives across all major industries.

Is John Leslie's contact information verified?

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

Last updated: July 25, 2026