John Mananquil

John Mananquil serves as Chief Operating Officer at TechStack. TechStack operates in the information technology & services sector with approximately 19.0 employees. The company is headquartered in San Francisco, California.

Industry & Role Insights

• • MessageCEO tracks 50,503 executives in the information technology & services sector.
• • 13,743 executive contacts are available in California.
• • 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 Mananquil, lead with your value proposition relative to the stack they currently use. Generic pitches perform poorly; specific technical relevance is key.

John Mananquil's Position in the MessageCEO Database

• •John Mananquil is 1 of 1 verified executive contact we track at TechStack.
• •49,754 verified executive contacts in information technology & services are in the MessageCEO database.
• •12,901 verified executive contacts in California are in the database.
• •229 verified contacts work at information technology & services companies in the 19.0 employee range (same size as TechStack).

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 We do not publish personal addresses or sensitive identifiers.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

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

What company does John Mananquil work for?

John Mananquil is Chief Operating Officer at TechStack, a company in the information technology & services sector with 19.0 employees. The company is based in San Francisco, California.

Can I pitch or sell to John Mananquil?

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

What industry is John Mananquil in?

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

Is John Mananquil's contact information verified?

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

Last updated: July 17, 2026