Mapping Digital Europe
Coordinated choropleth + bar chart (D3) exploring internet access & freedom across Europe.
View project →Ephraim Retta
About
- GIS Developer & Cartographer focused on clear, human‑centered maps.
- Web mapping with Leaflet/D3; data pipelines in Python/R; PostGIS on AWS.
- Comfortable across the stack: data wrangling → analysis → UX → deployment.
- Based in Indianapolis, open to remote/hybrid roles.
Portfolio
Nitrate & Cancer Explorer WI
Leaflet app with client-side IDW and regression to explore nitrate levels vs. cancer rates.
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College Experience Mapper
Mapping college ratings using geospatial filters and user-submitted data.
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Sports & Fitness Park
Mobile-friendly park finder with spatial DB backend (PostGIS) and real-time features.
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Migrant Infrastructure Map
Prototype mapping migrant-serving amenities using Central Place Theory as a lens.
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Indianapolis Weather Trends
R + Quarto dashboard analyzing Indy weather 2019–2023 (Open-Meteo API).
View project →Resume
Summary
Versatile IT consultant and GIS Developer with proven success in cloud infrastructure, CRM systems, and data management, delivering scalable solutions that enhance operational efficiency and support international business growth.
Skills
Languages:
English
German
Amharic
Programming Languages:
Python
R
SQL
JavaScript
GeoJSON/TopoJSON
GIS & Viz:
Leaflet
D3
ArcGIS / ArcPy
PostGIS
GDAL/OGR
Platforms & Dev:
AWS
Node/Express
Git/GitHub
Quarto
Shiny
Education
M.Sc. in GIS & Cartography
University of Wisconsin – Madison · 2025 · GPA: 3.87
Focus: spatial analysis, geovisualization, web mapping, database design.
B.A. in Human Geography
Goethe University Frankfurt, Germany · 2022 · GPA: 3.63
Thesis: Infrastructure, demographics, and urban spaces: Exploring migrant-centered monetary services.
Studies in Psychology & History
Indiana University - Bloomington · 2014-16
Coursework in Social Psychology, Abnormal Psychology and Western European/Renaissance History
Core 40 with Honors - High School Diploma
Ben Davis High School · 2014 · GPA: 3.6
NHS, IB, Top 3% of Graduating class.
Work Experience
IT / Automation Consultant (Part Time)
Indiana Painting
2024–present · Indianapolis, IN
- Implemented CRM automations and integrations (Zapier, Monday.com) across business workflows.
- Designed dashboards and data quality checks; authored documentation and SOPs.
GIS & Data Analyst — Project Work
UW Madison
2024–2025 · Madison, WI / Remote
- Built Leaflet apps with client-side IDW interpolation and regression for environmental health analysis.
- Developed D3 coordinated views (map + bar chart) for multivariate European internet metrics.
- Managed PostGIS on AWS; created ETL pipelines in Python/R for geospatial datasets.
Cloud & Infrastructure Analyst
Accenture
2023–2025 · Frankfurt, Germany
- Setting-up and maintaining the client's test lab infrastructure, consisting of over 25 test labs across two countries to test the migration of the client's cash register and POS infrastructure to Microsoft Azure.
- Making an impact on over 5300 stores, consisting of over 18500 cash registers and more than 6000 mobile devices across 9 countries.
- Managing the test lab infrastructure to enable testing in multiple environments and parallel testing streams.
- Delivered 2nd-level hyper-care support via ServiceNow, collaborating with vendors and authoring extensive technical documentation and SOPs.
Contact
Email: [email protected]
Links: LinkedIn · Personal Website · GitHub
Location: Indianapolis, IN · Available for remote/hybrid