John Killian

John Killian serves as CEO at GreyScout. GreyScout operates in the information technology & services sector with approximately 19.0 employees. The company is headquartered in County Dublin. GreyScout generates annual revenue of 3000000.0. To date, GreyScout has raised 5126340.0 in total funding, with the most recent round being Seed.

Industry & Role Insights

• • MessageCEO tracks 50,503 executives in the information technology & services sector.
• • 226 executive contacts are available in County Dublin.
• • Our database includes 201,468 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 Killian, lead with your value proposition relative to the stack they currently use. Generic pitches perform poorly; specific technical relevance is key.

John Killian's Position in the MessageCEO Database

• •John Killian is 1 of 1 verified executive contact we track at GreyScout.
• •49,754 verified executive contacts in information technology & services are in the MessageCEO database.
• •225 verified executive contacts in County Dublin are in the database.
• •229 verified contacts work at information technology & services companies in the 19.0 employee range (same size as GreyScout).

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 We do not publish personal addresses or sensitive identifiers.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

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

What company does John Killian work for?

John Killian is CEO at GreyScout, a company in the information technology & services sector with 19.0 employees. The company is based in County Dublin.

Can I pitch or sell to John Killian?

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

What industry is John Killian in?

John Killian works in the information technology & services industry as CEO at GreyScout. MessageCEO provides verified contact information for executives across all major industries.

Is John Killian's contact information verified?

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

Last updated: July 28, 2026