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Justin Grass

I'm a Data Analyst

About

Hello there! I'm Justin Grass and I love working with data, so much so that I decided to start a website showcasing all my side projects. This is also an effort to build up my technical skills with things like web pages, version control, and deploying code bases. Finally, I wanted a place to talk about my band because it is such a huge part of my life. I hope you look around and enjoy what you see. Thank you!

Data Engineer & Economist.

I've spent my career at General Motors in various roles like software development, finance analytics, and in strategy planning. These roles all seem very different, but they're all united by the theme of data!

Age: 27
Email: justin.grass20@gmail.com
City: Detroit, USA

Degree: B.S. Economics
Industry: Automotive
Interests: Machine learning and software development

I developed a deep interest in data after I graduated college and got hired into GM. I learned a lot a from mentors who taught me in each role. Thanks to them, I have been able to launch a successful career at GM that I never would have dreamed would be possible for me to achieve.

Years of Experience in automotive

Million Dollars of savings annualy through my analysis

Hours of work automated annually using python

Billion Rows of data validated with my tools

Skills & Proficiencies

Rating my different skills and the level of experience I have with them.

Python 100%

PySpark 100%

Machine Learning75%

SQL 80%

Data Storytelling 90%

Web Development 55%

Resume

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Education

Bachelors of Science: Economics

Start Date: Fall 2017

End Date: Fall 2029

Oakland University, Rochester, MI

Coursework focused on econometrics, statistics, and business anlytics.

Masters of Science: Analytics

Start Date: Fall 2025

End Date: Fall 2028

Georgia Tech, Atlanta, GA

Graduate program focused on machine learning and artificial intelligence.

Current Role

Economist

May 2024 - Present

Detroit, MI

General Motors

Drove analysis on open-source trade data, turning 247 million rows into impactful insights on global trade patterns for regional leadership
Designed an interactive visualization of global EV penetration by combining various data sources into a single Power-BI for executive partners
Collaborate with global leadership to assist their long-term forecasting of vehicle sales in the U.S., China, and other key international markets

Professional Experience

Finance Analyst

Jan 2023 - May 2024

Detroit, MI

General Motors

Extracted insights from product level data by translating tens of millions of rows into analytics on negative profit driving units, which led to savings of up to $700 million USD annually
Leveraged Python and ETL techniques to deliver process automation to legacy systems, alleviating 60 working days of manual effort annually
Influenced executive leadership across different departments within the company through creative and meaningful presentations of data

Software Developer

Jan 2020 - Jan 2023

Detroit, MI

General Motors

Built a custom PySpark data validation tool that leveraged GM's big data compute network. The tool tested over 1.7 billion rows and 19 thousand columns in under 5 days of run time. This effort expedited project timelines by 20 working days and is seen internally as instrumental to the project's success.
A key developer in the migration of Warranty Analytics from a series of legacy SAS programs to GM's next generation open source big data platform. This was a high visibility project having an impact of over 8 billion dollars on GM's balance sheet, with regular external audits to make sure reporting was compliant with SEC guidelines.