Hi! My name is Josh and I am looking to become more involved in data science projects that are mission-driven and have a humanitarian focus. I recently left my job as a Data Scientist at a start-up, where I gained experience building scalable models and algorithms for work related to time-series forecasting, anomaly detection, and root cause analysis. Before this role, I was in academia studying the outer solar system planets, where I combined multi-wavelength observations, statistical methods (Bayesian & MCMC techniques), and physical / numeric modeling in Python to retrieve the chemical, wind, and thermal structure of these planets' atmospheres. In my spare time, I love drawing, baking, tabletop roleplaying, and building and solving crossword puzzles. Any project that allows me to flex the creative energy I desire from my hobbies is appealing to me.

I am interested in projects centered on education, public health, and / or climate change. These domains have either been a large part of my life in other areas of work (I have been a teacher and mentor for several years), or the focus of my pet projects. For example, I have built an end-to-end pipeline which uses tree-based classifiers to predict the onset of hypoglycemia using my personal glucose data. I also built an app that forecasts bad air quality by location using EPA geospatial data.

As I explore new work opportunities, I hope to use this volunteer experience to meet other, mission-driven people, keep my analytic skills fresh, and expand my skill set, all while giving back in some way. Please reach out if you think I am a good fit for your project!

Personal information
Full name: Joshua Tollefson
User name: jtollefs
Organization memberships
Not a member of any organization.
Awards
No awards received yet.
Volunteer background
Education: PhD on Earth and Planetary Science (University of California Berkeley)
LinkedIn profile
Github profile
Portfolio
Volunteer availability
Start date: None
End date: None
Hours available per week: 10
Volunteering interests
No stated preferences.
Skills
Skill
Beginner
Intermediate
Expert
Python
Ruby
Computer Science (Algorithms)
JavaScript
Geospatial
SQL
Data in Text Files
Data in Relational Databases
Text Data (NLP)
Data from Sensors
GIS tools
Network/Graph Data
Multimedia Data (Video or Audio)
Data > 1TB
Experimental Methods (RCTs, A/B testing, etc.)
Data Visualization
Experience working on real-world problems using data
Social Science (Economics, Sociology, etc.)
Data Analysis
Time Series Models
Decision Trees
Semi-Supervised models
Unsupervised models
Random Forests
SVMs
Causal inference
Neural Networks / Deep Learning
Graphical models
Matlab

Volunteer projects

No volunteer work yet.