Jonathan Gellar
Senior Statistician
Washington, District of Columbia, United States
Summary
👤
Senior🎓
Top SchoolJonathan Gellar is a Senior Statistician at Mathematica with 11 years of experience leading statistical design and analysis for evaluations in healthcare policy, education, child welfare, and financial inclusion. He combines PhD-level biostatistics and an MPH from Johns Hopkins with deep methodological breadth in causal inference, predictive modeling, and survey analysis using both Bayesian and frequentist approaches. At Mathematica he directs all statistical aspects of projects, translating complex policy questions into rigorous study designs and actionable findings. His background includes algorithm development for multi-contrast MRI segmentation and hands-on research roles across academic and clinical settings, reflecting a blend of computational, clinical, and policy expertise. Known for bridging technical rigor and real-world impact, he brings a pragmatic focus on reproducible, policy-relevant inference.
11 years of coding experience
13 years of employment as a software developer
Bachelor of Science (BS), Biomedical/Mechanical Engineering and Computer Science, Bachelor of Science (BS), Biomedical/Mechanical Engineering and Computer Science at University of Southern CaliforniaDoctor of Philosophy (PhD), Biostatistics, Doctor of Philosophy (PhD), Biostatistics at Johns Hopkins Bloomberg School of Public Health
Spanish
Stackoverflow
303reputation
9kreached
2answers
2questions
Github Skills (88)
regression10
dplyr10
stan10
r-package10
statistical-models10
brms10
multilevel10
r9
parser9
data-transformation9
bayesian-inference9
literate-programming9
rcpp9
grammar9
bayesian9
Programming languages (4)
Github contributions (5)
jgellar/mgcvTrans
Apr 2015 - Aug 2022
Contributions:46 pushes, 9 branches in 7 years 4 months
refunders/refund
Mar 2015 - Mar 2016
Regression with functional data
Contributions:113 commits, 98 pushes, 4 branches in 1 year 1 month
regressionfunctional-data
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