Leonid Yastremskiy

Leonid Yastremskiy serves as Chief Executive Officer at One Source. One Source operates in the information technology & services sector with approximately 20.0 employees. The company is headquartered in Kyiv, Kyiv city.

Industry & Role Insights

• • MessageCEO tracks 50,503 executives in the information technology & services sector.
• • We have verified contacts for 3 executives at One Source.
• • 148 executive contacts are available in Kyiv city.
• • Our database includes 201,469 c suite-level executives.

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Serhiy Nikolskiy Chief Operating Officer in OneSource at One Source

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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 Leonid Yastremskiy, lead with your value proposition relative to the stack they currently use. Generic pitches perform poorly; specific technical relevance is key.

Leonid Yastremskiy's Position in the MessageCEO Database

• •Leonid Yastremskiy is 1 of 2 verified executive contacts we track at One Source.
• •49,754 verified executive contacts in information technology & services are in the MessageCEO database.
• •148 verified executive contacts in Kyiv city are in the database.
• •336 verified contacts work at information technology & services companies in the 20.0 employee range (same size as One Source).

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 We do not publish personal addresses or sensitive identifiers.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

Leonid Yastremskiy's verified email address is available to MessageCEO Pro subscribers. They currently serve as Chief Executive Officer at One Source. Access direct contact info to skip gatekeepers and reach the decision maker.

What company does Leonid Yastremskiy work for?

Leonid Yastremskiy is Chief Executive Officer at One Source, a company in the information technology & services sector with 20.0 employees. The company is based in Kyiv, Kyiv city.

Can I pitch or sell to Leonid Yastremskiy?

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

What industry is Leonid Yastremskiy in?

Leonid Yastremskiy works in the information technology & services industry as Chief Executive Officer at One Source. MessageCEO provides verified contact information for executives across all major industries.

Is Leonid Yastremskiy's contact information verified?

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

Last updated: July 23, 2026