onPhase Appoints Jeff Zamczyk as Chief Revenue Officer

Proven fintech revenue leader joins onPhase to accelerate customer growth and partner expansion

TAMPA, Fla. - October 15, 2026 /PRNewswire/ - onPhase, an integrated finance and operations platform, today announced the appointment of Jeff Zamczyk as Chief Revenue Officer. In this role, Zamczyk will lead sales, account management, and partnerships at onPhase, overseeing the teams that bring the platform to new customers and grow with existing ones. He will report to the Chief Executive Officer, Robert Michlewicz.

The appointment comes at a pivotal growth stage for onPhase as it expands its reach with dealerships and mid-market finance teams and continues to grow its partner ecosystem. Zamczyk’s primary focus is scaling the revenue organization behind that growth, from winning new customers to expanding relationships with existing ones and selling alongside onPhase’s partners.

Zamczyk has a strong track record of building and scaling B2B revenue organizations. Most recently, he built the go-to-market organization at Stampli from its earliest days, joining in 2019 to lead sales and customer success and later serving as Chief Revenue Officer. In that role, he helped Stampli grow into a market leader in the finance automation space, launch multiple new products, and navigate several funding rounds.

Before Stampli, Zamczyk led the sales and customer success teams at EAT Club through significant growth and its acquisition. Earlier, at SuccessFactors, an SAP company, his global mid-market sales teams delivered strong year-over-year results. Before that, at TriNet, he helped build and scale the sales organization through the company’s rapid growth and IPO.

“I was drawn to onPhase because of the depth of the platform and the strength of its position in vertical markets and its partner network,” said Zamczyk. “The foundation is in place for the next stage of growth. My focus is building a disciplined, predictable revenue engine, helping more customers put the full platform to work and expanding the partnerships that extend our reach.”

“Jeff brings deep experience building and scaling revenue organizations at high-growth companies, and he has earned the trust of finance leaders and the partners who serve them,” said Robert Michlewicz, Chief Executive Officer of onPhase. “We continue to invest in the leadership our customers need, and Jeff’s appointment is a direct reflection of that commitment. His disciplined approach to building repeatable, predictable growth will be instrumental as we bring onPhase to more finance teams, expand our partner ecosystem, and continue delivering the value our customers expect.”

Zamczyk joins an executive team onPhase has built out over the past year, including Chief Payments Officer Boyce Adams, Chief Product Officer Sudarshan Ranganath, Chief Customer Officer Heather Peterson, and Chief Financial Officer Kathryn Eskandarian. The executive additions reflect the company’s continued investment in the people and capabilities required to support customers as onPhase continues to scale.

About onPhase
onPhase is the platform that unifies finance and operations to unlock working capital and accelerate growth. onPhase aligns AP and payments functions with corresponding documentation and data impacting operations to provide a real-time view of cash and spend across every entity and location. Embedded controls and role-based security protect capital at every step, while a complete documentation trail keeps every approval audit-ready. With more than 25 years of experience, onPhase has a proven track record of securing finance teams and maintains SOC 1 Type II, SOC 2 Type II, HIPAA, and Nacha compliance. www.onphase.com

Media Contact
Meghan Furtado
Mfurtado@onphase.com