A little background

Andrew is currently a Lead Engineer of Combustion Aerodynamics at GE Aerospace where he supports the design, development, and validation of hydrogen fuel on aeroderivative gas turbine combustion systems. GE is committed to the development of Sustainable Aviation Fuels (SAFs), including hydrogen-powered gas turbine engines. Andrew is proud to be a part of this industry-leading work, and has a long history of developing carbon-neutral and carbon-free fuels and combsution systems, from thermochemically converted fuel-precursors derived from agricultural waste, to solid fuels produced from fecal material in Rwanda.

Andrew is a strong advocate for the environment, and his professional passions include renewable energy, aviation, and international development. Andrew served in the Peace Corps in South Africa as an education volunteer where he taught middle-school math and science, developed after-school woodworking projects, and rehabilitated disused boreholes for drinking water.

Andrew graduated from Rose-Hulman Institute of Technology with a B.S. in Mechanical Engineering (2011), from Tufts University with an M.S. in Mechanical Engineering (2015), and from Cornell University with a Ph.D. in Bioenergy and Integrated Energy Systems (2022).

GE Aerospace

As GE Aerospace continues to develop and improve gas turbine engines, Andrew is looking towards hydrogen as a viable alternative to traditional fossil fuels. Andrew's work encompases testing and redesigns of engines to support hydrogen fuel.

Previous Experience

A collection of past projects and jobs

Cornell University, Ph.D.

Energy and Resource Solutions

PivotWorks: Rethinking Sanitation

Recent Publications

  • Aditya H. Iswardi, Andrew H. Hubble, Johannes Lehmann, and Jillian L. Goldfarb, “Can Batch Lab-Scale Studies of Slow Pyrolysis Describe Biochar Yields and Properties Upon Upscaling to a Continuous Auger Kiln?”, Journal of Cleaner Production, Feb. 2025.
  • A.H. Hubble, B.A. Childs, M. Pecchi, H. Sudibyo, J.W. Tester, and J.L. Goldfarb, “Role of in situ (in contact with biomass) and ex situ (in contact with pyrolysis vapors) transition metal catalysts on pyrolysis of cherry pits”, Fuel, vol. 352, Nov. 2023.
  • Hubble, A.H. and J.L. Goldfarb. “Bio-based Solid Fuels.” Chapter 10 in Renewable Fuels: Sources, Conversion and Utilization. Edited by J. O’Connor, B. Noble, T. Lieuwen. Cambridge University Press. December 2022.