Postdoctoral Scholar

Nils is a Postdoc in the Criddle-lab at Stanford University. For CUBES he is developing microbial cell factories that convert C1-carbons into high-performance polymers that can serve as materials for consumables and durable goods. He is also an Analog Astronaut, demonstrating biomanufacturing capabilities in the field (at a Space Exploration Analog and Simulation Habitat), as a proving ground for Mars.

Wenyu Gu is currently a postdoc at Stanford University. 

Derek F. Harris is a Postdoctoral Fellow in the Seefeldt group at Utah State University. He received a B.S. in biology from Dixie State University and a Ph.D. in biochemistry from Utah State University.

Dr. Harris is interested in the mechanism and evolution of nitrogenase enzymes, as well as applications of nitrogenases unique catalytic properties.

Jake hails from the far-away lands of the Midwest. He received his Bachelor's degree in Genetics from the University of Wisconsin-Madison where he was introduced to the world of scientific research through the study of the evolution of gene expression regulation in the yeast Saccharomyces cerevisiae. Upon graduation, Jake began his graduate work in Marine Studies at the University of Delaware where he studied the regulation of energy metabolism in green sulfur bacteria (the Chlorobiaceae). Being a microbiologist that had always admired synthetic biology from a distance, and one that was enamored with space exploration, Jake joined the Arkin Lab at the University of California-Berkeley as a postdoc to pursue applications of microbial engineering to space exploration and colonization. Jake's research interests include environmental microbiology, microbial physiology/systems biology, genetics, synthetic biology, and space bioengineering. 

kbsander [AT] berkeley [DOT] edu

Kyle Sander grew up in Portland, Oregon and attended Oregon State University earning a B.S. in Chemical Engineering.  He interned at a Georgia-Pacific Containerboard Mill for a year as an Environmental/Process Engineer, and then went on to earn an M.S. degree in Biological and Ecological Engineering studying life cycle effects of algae production for fuels and co-products. He also investigated rapid sand filtration as an algal dewatering process step and enzymatic degradation of, and simultaneous saccharification and ethanol production from, of algal cell biomass.

Kyle earned his PhD from the University of Tennessee, Knoxville conducting his thesis research within the BioEnergy Science Center at Oak Ridge National Laboratory.  Kyle focused on characterizing and engineering regulatory genes and related cellular redox in two candidate lignocellulolytic, ethanol-producing biocatalysts; Clostridium thermocellum and Caldicellulosiruptor bescii.  Basic redox metabolism was characterized in C. thermocellum, yielding an expanded view of redox metabolism in this organism, as well as a set of promising redox-active metabolic loci which were targeted in subsequent engineering for ethanol yield improvement done by others.  Single-gene deletion mutants of promising regulatory gene targets in C. bescii were generated and screened in bioprocessing-relevant conditions to assess the engineering potential of each gene target.  Deletion of a global redox sensing transcription factor (Rex) enabled C. bescii to synthesize 75% more ethanol and allowed us to comprehensively describe the unique Rex regulon in this organism.  A genotype-phenotype relationship was identified between the FapR local fatty acid biosynthesis repressor and this organism’s tolerance to elevated osmolarity conditions, a highly complex, bioprocess-limiting, and difficult-to-engineer trait.

Outside of the lab, Kyle enjoys running, reading, rock-climbing, spending time with family and friends, and becoming more familiar with his new Berkeley and California surroundings.

Sunggeun Woo earned his B.S. and M.S. from Yonsei University in South Korea. During his B.S. and M.S. programs, he studied in the civil and environmental engineering department and he narrowed down his research focus to environmental biotechnology in his M.S. program, where he wrote fifteen papers for about two and a half years including five of them as the lead-author. At that time, the research topics were various in the field of environmental biotechnology including wastewater treatment systems, isolation and cultivation of microorganisms and harnessing renewable bio-diesel from microalgae. Based on the wide range of understandings, Sunggeun Woo joined the Criddle group for his Ph.D. program in September, 2012 focusing on the Coupled Aerobic-anoxic Nitrous Decomposition Operation (CANDO) project. Sunggeun Woo participated in developing the CANDO process which produces a renewable energy, nitrous oxide (N2O), from nitrogen pollutants through microorganisms. During his Ph.D. program, Sunggeun Woo's main focus was to elucidate the microbial members that produce N2O and the metabolic pathways in them related to N2O and polyhydroxybutyrate (PHB) production. He graduated from Ph.D. program in January, 2018 and he is now continuing his research as a post-doctoral scholar in the Criddle group. His research is currently focusing on the recovery of renewable energy and materials from waste or wastewater using microorganisms.