AI Sales Platform Apollo Appoints New Chief Product Officer

Mark Sieglock joins the company to lead its product strategy, design, research and engineering teams.

Written by Ashley Brownridge
Published on Sep. 01, 2026
Mark Sieglock, new CPO of Apollo
Mark Sieglock, new CPO of Apollo. | Photo: Apollo
REVIEWED BY
Rose Velazquez

Apollo, a San Francisco-based company specializing in go-to-market software solutions, recently announced the appointment of its new chief product officer. Mark Sieglock joins the company’s executive leadership team to further its mission of building a connected, intelligent GTM system that helps businesses find and win customers.

Apollo leverages AI to connect critical GTM systems encompassing customer data, outreach, marketing, pipeline management and other revenue workflows. Sieglock brings ample experience building and scaling products such as eero, a mesh wireless router system, to the company. In his new capacity as CPO at Apollo, he will advance its product strategy to build a system that lets AI fully understand customer context, determine the next best action and execute it across the revenue lifecycle.

“Mark is one of the most talented product leaders I’ve encountered,” Matt Curl, Apollo’s CEO, said in a statement. “He has built and scaled through category-defining shifts, and he understands what this moment represents for Apollo. We’re building an AI GTM system that brings data, intelligence and execution together so every business can find and win customers. Mark has the product vision, technical depth and customer obsession to help us build that future.”

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