John Callahan

John Callahan serves as Chief Technology Officer at Veridium. Veridium operates in the information technology & services sector with approximately 44.0 employees. The company is headquartered in New York, New York. Veridium generates annual revenue of 12000000.0. To date, Veridium has raised 16650000.0 in total funding, with the most recent round being Other.

Industry & Role Insights

• • MessageCEO tracks 50,503 executives in the information technology & services sector.
• • 6,952 executive contacts are available in New York.
• • Our database includes 201,469 c suite-level executives.

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Marvin Jo CTO at 위블링

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Robert Kim CEO, North America at 당근마켓

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Kyung Lim CTO at 인터파크

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Alex Ryu Chief Operating Officer, Supply Chain Solutions Group at 동양시스템즈(주)

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Wonho Kang 라포테이블(팔도감) | CEO · Product Lead at 라포랩스(퀸잇)

Outreach Guidance — information technology & services Sector

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

John Callahan's Position in the MessageCEO Database

• •John Callahan is 1 of 1 verified executive contact we track at Veridium.
• •49,754 verified executive contacts in information technology & services are in the MessageCEO database.
• •6,778 verified executive contacts in New York are in the database.
• •507 verified contacts work at information technology & services companies in the 44.0 employee range (same size as Veridium).

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 We do not publish personal addresses or sensitive identifiers.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

John Callahan's verified email address is available to MessageCEO Pro subscribers. They currently serve as Chief Technology Officer at Veridium. Access direct contact info to skip gatekeepers and reach the decision maker.

What company does John Callahan work for?

John Callahan is Chief Technology Officer at Veridium, a company in the information technology & services sector with 44.0 employees. The company is based in New York, New York.

Can I pitch or sell to John Callahan?

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

What industry is John Callahan in?

John Callahan works in the information technology & services industry as Chief Technology Officer at Veridium. MessageCEO provides verified contact information for executives across all major industries.

Is John Callahan's contact information verified?

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

Last updated: June 27, 2026