SundaySky, the enterprise-grade AI video platform, is making a bold move to accelerate its next stage of growth. The company announced a wave of high-impact executive appointments, signaling its intent to cement leadership in the AI-powered video personalization space. The new team includes:

• Tammy Martin as Chief Financial Officer (CFO)

• Mark Flaharty as Chief Commercial Officer (CCO)

• Brendan Cournoyer as Vice President of Marketing

• Dan Sylvester, promoted to Chief Revenue Officer (CRO)

The expansion of SundaySky’s leadership bench comes at a pivotal time, as the company doubles down on scaling its AI-driven video platform and expands personalized video capabilities across verticals like advertising, marketing, and customer success.

Executive Hires Signal Strategic Inflection Point

“SundaySky is entering a period of strategic momentum,” said CEO Marc Zionts. “Tammy, Mark, Brendan, and Dan bring the leadership, experience, and energy needed to execute with precision and accelerate growth across key verticals.”

The appointments bolster SundaySky’s ability to execute on a product vision that's already resonating across the enterprise landscape—with customers increasingly demanding more personalized, measurable, and scalable video solutions.

Meet the New Leaders Driving SundaySky’s Next Chapter

Tammy Martin – Chief Financial Officer
A veteran of high-growth tech firms, Martin most recently served as CFO at industrial analytics startup Seeq, where she helped secure $300 million in funding. With experience in scaling SaaS metrics and executing strategic exits—including deals with IBM and UnitedHealth Group—Martin is poised to guide SundaySky through its next phase of growth with a focus on capital efficiency and operational rigor.

Dan Sylvester – Chief Revenue Officer
Since joining SundaySky in 2018, Sylvester has helped build and scale the revenue organization. As CRO, he now oversees all revenue-generating functions—from new business acquisition to customer retention and partnerships. His promotion underscores SundaySky’s focus on integrated growth and client success.

Mark Flaharty – Chief Commercial Officer
Flaharty returns to SundaySky with a deep track record in digital media, including stints at Google, Criteo, and Piano.io. He’ll now lead commercial strategy for SundaySky Advertise, the company’s personalized video ad solution. Expect him to sharpen the focus on ROI-driven campaigns for major brands across retail, finance, and media.

Brendan Cournoyer – VP of Marketing
With experience leading marketing at Building Engines and Brainshark, Cournoyer brings a data-driven approach to brand and demand generation. At SundaySky, he will spearhead initiatives to grow the platform’s customer base and expand awareness of its AI-powered personalization capabilities.

Video is no longer a "nice-to-have" in enterprise engagement—it's a strategic must. But personalization at scale has remained elusive for many brands. SundaySky is aiming to solve that with an AI-first, modular platform that generates customized video experiences across the customer lifecycle—from acquisition to loyalty.

These leadership appointments suggest SundaySky is not just expanding—it's preparing for a potential breakout moment. With SaaS-savvy leadership now in place across finance, marketing, commercial strategy, and revenue, the company is well-positioned to compete in a crowded, fast-evolving space.

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