(Hablo español con fluidez, pero no quiero escribir lo siguiente dos veces.)===== Some Professional Highlights =====Since January 11th, 2024, I have been the technological advisor to the director of Colombia's tax authority, the DIAN. I investigate and patch security holes in enormous legacy systems, provide DevOps solutions (automating data engineering and machine learning processes), and advise on architectural, data science and security questions.I spent the six years before that as Chief Technical Officer for theObservatorio Fiscal[1], a non-profit that researches and forecasts the economic effects of policy in Colombia. I led software development, data engineering and systems administration, and shared responsibilities for economic and statistical analysis and writing. I built our open-source tax microsimulation model of Colombia[2], and its public web interface[3].At the US Congressional Budget Office[4], during the 2008 financial crisis, I built a model to forecast foreclosure rates.In 2021, I cofounded a cryptocurrency trading company. We made just enough money to cover our high regulatory costs. It was a learning experience.I have around a decade of experience teaching mathematics, statistics and economics.===== Some Open-Source Activities ====I am the author of Hode, the Higher-Order Data Editor[5], an open-source hypergraph database, search engine, query language and editor for semantic data, written in Haskell.I co-developed Semantic Synchrony[6], an open-source distributed knowledge graph server and editor, and wrote its documentation.I am also the author of Montevideo, a suite of real-time music applications written in Haskell. Montevideo provides a language for creating musical patterns, a microtonal synthesizer for the open-source {monome[8] grid controller, and facilities for ear-training and exploring the mathematics of higher equal divisions of the octave.[1] http://www.ofiscal.org[2] https://github.com/ofiscal/tax.co[3] http://www.ofiscal-puj.org/microsim/run_make/manual_ingest[4] https://www.cbo.gov/[5] https://github.com/JeffreyBenjaminBrown/hode}{Hode[6] https://github.com/synchrony/smsn/wiki[7] https://github.com/JeffreyBenjaminBrown/montevideo[8] https://monome.org