Our Team

Sean’s earlier ventures include TheLoanPage.com, an Internet mortgage lead company acquired by Battery Ventures in 2003; ListenSmart.com (1999); and ABOVO.co (2015), for which he is sole inventor on U.S. Patent 10,404,634. He is the named inventor on Symphony42’s 2026 patent application for full-funnel AI voice selling. Sean has been a YPO member since 2009 and was named Ernst & Young Entrepreneur of the Year in 2011.

He holds a Doctor of Musical Arts from the Peabody Institute of the Johns Hopkins University, where he also earned his master’s degree; the company’s name and vocabulary — orchestration, harness, rehearsal, score — come from that training. He has shipped with AI since December 2022 and publishes everything he has built with it. Sean carries all of Symphony42’s business-to-business selling himself, and believes “it’s all about the people.”

At the MIT AI Lab, Dave pioneered neural-network quantization in 1992 — the reason he is called the “Godfather of Neural Net Quantization.” He is Founder and General Partner of Link Ventures, Chairman of Vestmark and of the tech incubator Cogo Labs, co-founder and General Partner at Vestigo Ventures, co-host of the Moonshots podcast, and an MIT instructor. He has served on more than twenty private and public boards.

Dave and Sean have been kindred spirits since 2009, when Dave served on DoublePositive’s board and backed the company through difficult years; fifteen years of partnership in Customer Acquisition and AI sit behind Symphony42. His contribution is specific: Customer Acquisition and AI judgment at every board meeting, the Link Ventures and MIT ecosystem for AI talent and research, introductions across the investor and industry network, and strategic direction on the transition from qualified transfers to full selling.

Ross is the Founder and former CEO of Jornaya, a leading consumer journey intelligence company acquired by publicly traded Verisk. He originally co-founded Jornaya (formerly LeadiD) in 2011 to bring transparency and trust to the online lead generation market. Prior to Jornaya, Ross spent over a decade in senior leadership roles at TARGUSinfo, growing the business from $10 million to over $130 million in annual revenue.

Ross and Sean have been trusted friends and collaborators in the Lead Generation and Customer Acquisition space for nearly 20 years. As an early investor in Symphony42, Ross recognized the potential for AI to transform Customer Acquisition, and provides counsel on strategic planning, partnerships, fundraising, and scaling.

Stein serves as Director at data science consultancy Elder Research and led analytics teams at Capital One and Value America. As a founding executive of Advertising.com, he was instrumental in growing the company from launch to over $200MM in revenue. He has played a pivotal role in raising over $69 million in venture capital, restructured companies post-acquisition, and recruited top technical talent.

Stein’s relationship with Sean spans over 20 years, beginning when Stein — as Entrepreneur-in-Residence for Battery Ventures — acquired TheLoanPage.com in 2003. They continued to work closely together during Stein’s tenure as an investor and board member at DoublePositive, where he also met Dave Blundin.