Minicozzi became the J. J. Sylvester Professor of Mathematics at Johns Hopkins in 2002, and later became Krieger-Eisenhower Professor there. He turned to work on minimal surfaces, continuing to work with Tobias Colding. In 2012 he joined MIT as a professor of mathematics. Currently, they mainly work on the mean curvature flow and the Ricci flow.
He won a Sloan Fellowship in 1998.
He gave an invited address on this work at the 2006 ICM in Madrid, a London Mathematical Society Spitalfields Lecture in 2007, the thirty-fifth University of Arkansas Spring Lecture Series in 2010, and an AMS invited address in Syracuse in 2010.[needs update]
The 2010 Veblen Prize in Geometry is awarded to Tobias H. Colding and William P. Minicozzi II for their profound work on minimal surfaces. In a series of papers they have developed a structure theory for minimal surfaces with bounded genus in 3-manifolds, which yields a remarkable global picture for an arbitrary minimal surface of bounded genus. This contribution led to the resolution of long-standing conjectures of initiated a wave of new results.