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Horizon3.ai has strengthened its global partner leadership to accelerate growth through managed service providers (MSPs) and strategic alliances. The company appointed Tim Mackie as Global Vice President of Worldwide Channels and announced that Marc Inderhees, who leads MSP and MSSP relationships, has been named to the prestigious 2026 CRN Channel Chiefs list, reflecting a strategic focus on partner-led expansion.
Horizon3.ai appoints Tim Mackie as Global VP of Worldwide Channels.
Marc Inderhees, leader of MSP/MSSP strategy, named a 2026 CRN Channel Chief.
The expansion aims to accelerate MSP- and partner-led growth.
It provides clearer ownership and support for the global partner ecosystem.
The focus is on enabling partners to deliver validated security outcomes at scale.
This structure supports the operationalization of the NodeZero platform through partners.
As demand for offensive security and vulnerability validation grows, Horizon3.ai is prioritizing its channel ecosystem as a critical route to market. The new leadership structure is designed to bring greater strategic focus and execution to partner programs and go-to-market motions worldwide. This shift acknowledges that managed service providers and strategic partners are essential for operationalizing security outcomes consistently and at scale for a broad customer base.
Tim Mackie brings over 25 years of experience building channel organizations for cybersecurity and enterprise technology firms, including Claroty, Armis, and SentinelOne. His mandate is to oversee all aspects of Horizon3.ai's worldwide channel and alliance strategy, from partner programs to ecosystem development. His role is central to enabling partners to deliver the company's NodeZero platform, helping customers transition from identifying risk to fixing and verifying it efficiently.
The recognition of Marc Inderhees on the CRN Channel Chiefs list underscores the importance of the MSP and MSSP segment within Horizon3.ai's strategy. Inderhees focuses on partner enablement and co-selling, empowering service providers to deliver the platform as part of their managed security offerings. This accolade reflects the momentum and successful integration of Horizon3.ai's solutions within the managed services channel.
"Being recognized by CRN is an honor, and it reflects the momentum we’re seeing as partners adopt and operationalize our platform," said Inderhees. This expanded leadership team is positioned to build a robust ecosystem that supports partners in delivering measurable, validated security outcomes to their customers.
About Horizon3.ai
Horizon3.ai’s NodeZero® platform is trusted by over 40% of the Fortune 10, the world’s largest banks, top global pharmaceutical and semiconductor manufacturers, critical infrastructure operators around the globe, and the U.S. Defense Industrial Base to proactively find, fix, and verify exploitable vulnerabilities to continuously fortify cyber defenses and improve cyber resilience. The fastest-growing cybersecurity company in America (Inc. 5000, Deloitte Fast 500), Horizon3.ai was founded by a mix of U.S. Special Operations veterans and industry experts and is headquartered in San Francisco.
About The Channel Company
The Channel Company (TCC) is the global leader in the channel growth for the world’s top technology brands. We accelerate success across strategic channels for tech vendors, solution providers, and end users with premier media brands, integrated marketing and event services, strategic consulting, and exclusive market and audience insights. TCC is a portfolio company of investment funds managed by Eagle Tree Capital, a New York City-based private equity firm.
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