WELCOME TO MY PERSONAL WEBSITE!

I am Jeff (he/they), a Scientist in the Interface Geochemistry section of the GFZ Helmholtz Centre for Geosciences. My current research focuses on molecular-scale mineral-organic matter interface biogeochemical processes in polar terrestrial and aquatic ecosystems.
Since January 2026, I have been working as a DAAD PRIME Fellow at TU Berlin and Aarhus University on a fully seconded basis. My work will be focused on organic matter transformation and export in iron-rich wetlands, combining microbial ecology, isotopic approaches, and ultra-high-resolution mass spectrometry.
In addition, I am also studying the formation and transformation of iron-bearing minerals, and their influence on the cycling of nutrients (e.g. P, Si) and toxic elements (e.g. As, Cr) in oxygen-poor modern and ancient environments. I combine several analytical approaches from geochemistry, materials and analytical chemistry, and nanoscience to gain better understanding of iron biogeochemistry at the nano- to atomic-scale.
Feel free to connect with me with my socials (BlueSky, X), or drop an e-mail!
GFZ Webpage | Google Scholar | ResearchGate | ORCID | LinkedIn
As a queer, POC and 1st-Gen scientist, I am a huge advocate LGBTQIA+ visibility, and diversity in STEM! 🏳️🌈 Check out my People’s Profile courtesy of the European Association of Geochemistry (EAG) Diversity, Equity and Inclusion (DEI) Committee.
Together with Dr. Claire Treat, Donovan Dennis and Mackenzie Baysinger, we have recently started the lunch club “Out on the ‘Berg” (aka Rainbow lunch) for LGBTQIA+ folks and allies at the Telegrafenberg scientific institutes GFZ-RIFS, AWI and PIK. The OOTB core group also recently teamed up with the GFZ Diversity Team to launch the first “Pride on the Hill” event last July 2024.
Please also visit Pride in STEM and LGBTQ STEM Berlin if you want to know more about how we can increase LGBTQ+ visibility, and create safe spaces for LGBTQ+ people in STEM.
PUBLICATIONS

GALLERY

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NEWS
June 24, 2026
I was invited as a speaker for the 150th Anniversary Meeting of the Mineralogical Society of UK & Ireland (MinSoc@150). Special thanks to RSC and DAAD for the conference travel grants.
May 12, 2026
I co-organised a workshop on “Unlocking Crystal Structure with Synchrotron and Mössbauer Methods” the the Philippine Nuclear Research Institute. Many thanks to Dr. Ruth Delina-Agillon (BSP Awardee) for leading the workshop!
May 5, 2026
We had a successful XAS beamtime at Diamond Light Source on natural H2 production in ultramafic rocks. This project is in collaboration with colleagues from the Philippine Nuclear Research Institute and British Geological Survey. More info can be found here.
April 24, 2026
I co-organised a workshop on “Redox-sensitive elements as drivers of carbon release from high-latitude landscapes” together with Dr. Emily Stevenson (GFZ) and Dr. Carolina Voigt (AWI) through the Geo.X network.
For more updates and details, please check the News tab.