He directed a diverse portfolio of R&D programs as a program manager at the Defense Advanced Research Projects Agency where he helped initiate the field of bioprinting tissue engineered constructs. Warren was a Principal Member of the Technical Staff at Sandia National Laboratories, and received his B.Sc. Honors and Ph.D. degrees in Engineering Science from The Pennsylvania State University, where his Ph.D. was awarded the best materials science thesis at the University.
He is a Fellow of the American Institute for Medical and Biological Engineering and a distinguished alumnus of the Pennsylvania State University, has authored over 200 referred publications, has one of the top cited papers in both the Journal of Applied Physics (top 20) and Applied Physics Letters (top 50), and over two dozen patents or patent applications. He has won several R&D awards, and several outstanding paper awards.