Bob Yantosca
Senior Software Engineer at Harvard John A. Paulson School of Engineering and Applied Sciences
Cambridge, Massachusetts, United States
Summary
👤
Senior🎓
Top SchoolBob Yantosca is a Senior Software Engineer with over 30 years of programming and data-visualization experience and 16 years focused on developing and supporting the GEOS-Chem atmospheric chemistry model at Harvard. He combines deep Fortran-based scientific computing expertise with modern tooling (Python, MPI/OpenMP, Git, netCDF/HDF) to implement, benchmark, and integrate chemical tracer models into Earth System Models and operational forecasting systems. A long-standing GEOS-Chem model engineer and Steering Committee member, he co-authored GCPy and GAMAP for CTM visualization and contributes substantive backend fixes to the widely used geos-chem science codebase. Bob’s strengths lie in structural programming, performance profiling, and producing reproducible forecasting/hindcasting systems for aircraft field campaigns, and he regularly translates complex scientific requirements into robust, well-documented code. An astronomy-trained scientist who also studied classics and education, he brings both rigorous analytical habits and clear user-focused documentation to collaborative, research-driven software engineering.
16 years of coding experience
17 years of employment as a software developer
BS, Astronomy (major), Classics (minor), BS, Astronomy (major), Classics (minor) at Case Western Reserve UniversityHigh School Diploma, High School Diploma at BC HighMaster of Arts in Teaching, Science Education, Master of Arts in Teaching, Science Education at Boston University Wheelock College of Education & Human DevelopmentMaster of Arts - MA, Astronomy, Master of Arts - MA, Astronomy at Boston University
English, Italian
Stackoverflow
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Github Skills (6)
fortran10
chemistry10
climate-model10
atmospheric-modelling10
scientific-computing10
modeling10
Programming languages (12)
Github contributions (5)
geoschem/geos-chem
Nov 2013 - Jan 2023
GEOS-Chem "Science Codebase" repository. Contains GEOS-Chem science routines, run directory generation scripts, and interface code. This repository is used as a submodule within the GCClassic and GCHP wrappers, as well as in other modeling contexts (external ESMs).
Role in this project:
Backend Developer
Backend DeveloperContributions:29 releases, 708 reviews, 2678 commits in 9 years 4 months
Contributions summary:Bob implemented features and bug fixes within the "geos-chem" repository, which is focused on the "GEOS-Chem Science Codebase". Their contributions primarily involved modifications to Fortran source code files, indicating a focus on scientific computing within the domain of atmospheric chemistry modeling. The commits included changes to modules related to aerosol and chemical modeling, addressing issues related to species concentrations and reaction rates.
geos-chemcloud-computingatmospheric-modellingawsscientific-computing
KineticPreProcessor/KPP-Standalone
Feb 2022 - Jun 2026
A box-model for a KPP-generated chemistry mechanism that takes the full chemical state of grid cells from 3D runs
Contributions:4 PRs, 6 pushes, 1 branch in 4 years 4 months
3d
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