Greg Castonguay

Greg Castonguay serves as CIO, CTO at Selenium Technology Partners. Selenium Technology Partners operates in the information technology & services sector with approximately 50.0 employees. The company is headquartered in Toronto, Ontario.

Industry & Role Insights

• • MessageCEO tracks 50,503 executives in the information technology & services sector.
• • 3,797 executive contacts are available in Ontario.
• • 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 Greg Castonguay, lead with your value proposition relative to the stack they currently use. Generic pitches perform poorly; specific technical relevance is key.

Greg Castonguay's Position in the MessageCEO Database

• •Greg Castonguay is 1 of 1 verified executive contact we track at Selenium Technology Partners.
• •49,754 verified executive contacts in information technology & services are in the MessageCEO database.
• •3,711 verified executive contacts in Ontario are in the database.
• •478 verified contacts work at information technology & services companies in the 50.0 employee range (same size as Selenium Technology Partners).

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 We do not publish personal addresses or sensitive identifiers.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

Greg Castonguay's verified email address is available to MessageCEO Pro subscribers. They currently serve as CIO, CTO at Selenium Technology Partners. Access direct contact info to skip gatekeepers and reach the decision maker.

What company does Greg Castonguay work for?

Greg Castonguay is CIO, CTO at Selenium Technology Partners, a company in the information technology & services sector with 50.0 employees. The company is based in Toronto, Ontario.

Can I pitch or sell to Greg Castonguay?

As CIO, CTO at Selenium Technology Partners, Greg Castonguay is a key decision-maker in the information technology & services sector. MessageCEO Pro gives you verified email to reach Greg Castonguay directly — ideal for B2B sales, partnerships, and executive recruiting.

What industry is Greg Castonguay in?

Greg Castonguay works in the information technology & services industry as CIO, CTO at Selenium Technology Partners. MessageCEO provides verified contact information for executives across all major industries.

Is Greg Castonguay's contact information verified?

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

Last updated: July 26, 2026