Sierra McMillen

Head of Partnerships, US

Sierra leads Aevi’s partnership strategy in the US, focusing on building relationships that turn complex payment ecosystems into real growth opportunities. Her experience spans the payments industry, with a strong focus on omnichannel orchestration, partner development, and creating ecosystems that work together.

At Aevi, Sierra takes a practical and modern approach to partnerships. It is not about logos or one-off deals, but about building long-term value, trust, and collaboration that can grow over time. She works closely with partners to simplify fragmented payment environments, helping them create smoother experiences and unlock new commercial opportunities.

As the industry moves toward more connected and intelligent ecosystems, Aevi is well positioned to help rethink how in-person payments are managed and evolved. Sierra plays a key role in that by bringing together the right partners, platforms, and ideas to turn that vision into something tangible across the commerce landscape.

Based in the United States, Sierra is known for connecting strategy with execution, helping organizations navigate a fast-moving payments space while staying focused on what matters most, which is delivering value for customers and building ecosystems that can scale.