Rien Wertheim

Rien Wertheim serves as CEO at Firely. Firely operates in the information technology & services sector with approximately 63.0 employees. The company is headquartered in Amsterdam, North Holland.

Industry & Role Insights

• • MessageCEO tracks 50,503 executives in the information technology & services sector.
• • We have verified contacts for 2 executives at Firely.
• • 1,041 executive contacts are available in North Holland.
• • Our database includes 201,469 c suite-level executives.

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Ewout Kramer CTO at Firely

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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)

Outreach Guidance — information technology & services Sector

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

Rien Wertheim's Position in the MessageCEO Database

• •Rien Wertheim is 1 of 2 verified executive contacts we track at Firely.
• •49,754 verified executive contacts in information technology & services are in the MessageCEO database.
• •1,033 verified executive contacts in North Holland are in the database.
• •243 verified contacts work at information technology & services companies in the 63.0 employee range (same size as Firely).

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 We do not publish personal addresses or sensitive identifiers.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

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

What company does Rien Wertheim work for?

Rien Wertheim is CEO at Firely, a company in the information technology & services sector with 63.0 employees. The company is based in Amsterdam, North Holland.

Can I pitch or sell to Rien Wertheim?

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

What industry is Rien Wertheim in?

Rien Wertheim works in the information technology & services industry as CEO at Firely. MessageCEO provides verified contact information for executives across all major industries.

Is Rien Wertheim's contact information verified?

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

Last updated: July 24, 2026