Jeff Dieffenbach is passionate about learning in all its forms, from birth through early childhood to pK-12 to higher education to workforce development. He serves as the Associate Director of the MIT Integrated Learning Initiative (MITili), which funds, connects, and shares research on effective human learning across these demographics. This research explores how differences in learners, instruction, and landscape lead to different learning outcomes.

Previously, Jeff served in senior product management, strategy, business development, sales, and marketing roles across a range of traditional and digital education companies offering instruction, assessment, and professional development products and services. In parallel with his professional work, Jeff served for ten years as an elected school board member in a suburban town west of Boston and for six years on the advisory board of professional development organization HILL for Literacy. Jeff earned master's degrees in Technology and Policy and in Materials Science and Engineering from the Massachusetts Institute of Technology.