Former Third Door Media CEO and Semrush acquisition leader joins Walk West to accelerate AI strategy and go-to-market execution for mid-market organizations.
Walk West has appointed Marc Sirkin as chief growth officer. Sirkin will lead the firm’s AI growth practice and go-to-market strategy, helping mid-market organizations turn AI investment into measurable revenue outcomes.
Sirkin brings more than 30 years of executive leadership across media, technology, and consulting including building, transforming, and exiting a business. Most recently, he served as CEO of Third Door Media, publisher of Search Engine Land, MarTech, and the SMX conference series, where he led a full AI integration across editorial and business functions before navigating the company’s acquisition by Semrush.
“Marc brings exactly the mindset and AI fluency our clients need right now,” said Greg Boone, CEO of Walk West. “He’s built and transformed businesses from the inside and led one through an acquisition. That lived experience makes him uniquely suited to help Walk West clients accelerate growth in a way that compounds, not just adds.”
Earlier in his career, Sirkin spent nearly a decade leading digital marketing and revenue programs at three of the country’s largest health nonprofits including Autism Speaks, the Leukemia & Lymphoma Society, and March of Dimes in which he scaled more than $50 million via digital platforms.
“This appointment signals where Walk West is headed,” said Donald Thompson, executive board chair of Walk West. “Every mid-market organization is facing the same question right now: how do we move from AI curiosity to AI readiness without losing what makes us effective? Marc has spent his career answering that question. Adding him as chief growth officer tells the market exactly how serious we are about helping our clients get there.”
Sirkin also held senior roles at PwC, building a broad foundation across sectors and disciplines. Sirkin is a contributor to MarTech.org and a speaker at industry events including INBOUND and All Things Open.
“The connective tissue between technology, content, and go-to-market execution is broken at most mid-market organizations and that’s the problem I’ve spent my career learning how to solve,” said Sirkin. “Walk West sits at the intersection of AI capability and human creativity, which is exactly what the market needs right now. My job is to turn that intersection into a growth engine for every client we work with.”
