Madeline Vossbrinck

madeline.vossbrinck@gmail.com | (203) 751-1123 | Connecticut

PROFESSIONAL EXPERIENCE

Personal Sabbatical

Connecticut | May 2025 – Present

• Taking planned time away from the workforce to care for young twins and manage a major household relocation

Data Scientist | Omnicom Media Group

New York, NY | Jul. 2021 – Apr. 2025

• Built and evaluated 20+ revenue generating machine learning audience segment models by adapting existing Python library for small sample sizes, providing clients additional targeting dimensions for improving cost per acquisition

• Developed and implemented predictive machine learning models in Python using 250M+ rows of credit card data to score propensity to purchase within product vertical, providing key data for a pitch to a $45B+ company

• Identified missing credit card data in brand analysis for pitch to $7B+ company, integrated third-party data source, and developed balanced weights using SQL and Python to ensure analytical accuracy

• Utilized internal AI tool to design and implement an automation framework in Python for machine learning model creation, reducing workflow duration from one week to two hours

• Managed quarterly scoring of 20+ audience segments (500M+ rows of data) using SQL and Redshift, available to clients that account for 25% of total US media buying

• Designed Tableau template that identified and highlighted the 10 highest-value insights for each audience segment, streamlined quarterly marketing materials (8+ hours saved), and received positive feedback from Product Director about improving client engagement

• Automated data transformation of 300+ Excel documents in Python for key dashboard, saving 20+ hours of manual work per client vertical

Business Intelligence Analyst | The Trade Desk

New York, NY | Oct. 2017 – Dec. 2020

• Developed and managed feedback for Tableau dashboards for client services team (150+ employees) that drilled down on customer spend, campaign pacing, and feature usage to enable better monitoring of client health

• Collaborated with the Client Operations Director to build a Tableau dashboard to track 40+ features and presented progress to North America VP of Client Services on a weekly basis

• Built and optimized SQL queries to link 15+ data sources, many with 1M+ rows

• Delivered 200+ ad hoc data requests, often with tight timelines and ambiguous requirements, while maintaining all planned project deadlines

Data Analyst | Montefiore Medical Center

Brooklyn, NY | Jul. 2014 – Oct. 2017

• Contributed to cohort studies published in peer-reviewed journals analyzing health outcomes of 9/11 first responders, providing critical evidence that supported federal healthcare funding legislation for NYC firefighters and EMTs

• Designed data warehouse tables and managed external contractor relationships to ensure accurate implementation, and performed comprehensive quality assurance in SAS and SQL to enable more accurate data queries and faster federal reporting

SKILLS

Programming: Python, SQL, R

Machine Learning Skills and Tools: Regression, Classification, NLP, Pandas, NumPy, Scikit-learn, NLTK, SciPy, statsmodels

Infrastructure and Tools: Postgres, Redshift, Data Warehousing, Git, Tableau, Matplotlib, Seaborn, Jupyter, VS Code

EDUCATION

• Metis – Data Science Bootcamp, 2021

• Harvard Business School Online – Certificate in Management Essentials, 2020

• Columbia University Mailman School of Public Health – MS Biostatistics, 2014

• Skidmore College – BA Mathematics & BA International Affairs, 2011