I am a staff scientist at LLNL with a focus on microbial ecology primarily in soils. I work on projects that use stable isotopes to study microbes in both laboratory and field settings, exploring how various environmental factors influence the interactions between plants, soil, and microbial communities. I manage and operate the High-Throughput Stable Isotope Probing (HT-SIP) pipeline at LLNL.

M. Sc. Microbiology, The Ohio State University, 2016

B. Sc. Molecular and Cellular Biology, University of Illinois at Urbana-Champaign, 2012

Ella T. Sieradzki, G. Michael Allen, Jeffrey A. Kimbrel, Graeme W. Nicol, Christina Hazard, Erin Nuccio, Steven J. Blazewicz, Jennifer Pett-Ridge, Gareth Trubl (2025). Phosphate amendment drives bloom of RNA viruses after soil wet-up. Soil Biology and Biochemistry, 205, 109791

 

Petar I. Penev, Katerina Estera-Molina, George M. Allen, Rohan Sachdeva, Shufei Lei, Ka Ki Law, Jordan Hoff, Steven J. Blazewicz, Jennifer Pett-Ridge, Jillian F. Banfield (2024). The active subset of grassland soil microbiomes changes with soil depth, water availability and prominently features predatory bacteria and episymbionts. bioRxiv 2024.12.19.629468