[5] Greenfield’s career in the blockchain industry began when he developed an online cryptocurrency trading firm as a junior at the University of Michigan.

[2] In 2018, Greenfield was appointed as the Chief of Technology for the Blockchain for Social Impact Coalition after ConsenSys helped launch the initiative.

[15] In 2020, he founded Emerging Impact (now known as Umoja Labs) a fintech company developing blockchain products for areas with limited access through fiat and mobile money.

[1][16][17] Emerging Impact has partnered with major NGOs such as Hope for Haiti, Care International, and the Celo Foundation to support digital humanitarian aid programs around the world.

[16][18][19] The company was named a winner of Inclusive Fintech 50’s 2022 cohort for their work in digitizing financial services for underserved communities.