Jack Stehn

Programming & Core Data Skills

• Python (Pandas, NumPy, SciPy)
• SQL (PostgreSQL, BigQuery)
• R
• Bash/Shell Scripting
• Excel for Analysis
• Statistical Analysis
• Feature Engineering
• Unstructured Data Analysis

Machine Learning - Predictive & Classical

• Predictive Modeling
• Predictive Risk Modeling
• Classification & Regression
• Clustering Algorithms
• Recommender Systems
• Bayesian Methods (PyMC3)
• ML Frameworks (Scikit-learn)
• Model Eval & Selection
• Time Series Analysis/Forecasting

Deep Learning & Advanced AI

• Deep Learning (PyTorch, TF/Keras)
• Neural Nets (CNN, RNN, Transformers)
• Reinforcement Learning Concepts

Natural Language Processing (NLP)

• NLP (Sentiment, Topic Models)
• Text Vectorization (TF-IDF, W2V)
• NLP Libs (spaCy, NLTK, HuggingFace)
• Info Extraction & Entity Recog.

Generative AI & LLMs

• Prompt Engineering
• LLM Fine-tuning
• Retrieval Augmented Generation
• LLM Orchestration (LangChain)
• LLM Evaluation & Benchmarking
• Open-Weights Models (Llama)
• LLM API Integration (OpenAI)
• LLM Deployment Considerations

Data Engineering & Cloud Platforms

• AWS Cloud (EC2, S3, Lambda, Athena)
• GCP Cloud (BigQuery, GCS)
• Data Pipelines (Dagster, dbt, dlt)
• Data Warehousing (BigQuery, Athena)
• Database Modeling (Star, Snowflake)
• ETL/ELT Design & Implementation
• API Design & Integration
• Docker & Containerization
• MLOps Principles & Tools

Software Engineering & DevOps Practices

• API Utilization
• Production Code Quality/Practices
• Object-Oriented Programming (OOP)
• Software Design Patterns
• Testing (Unit, Intg, E2E, Pytest)
• CI/CD Pipelines (GitHub Actions)
• Version Control (Git, GitHub)
• Agile Methods (Scrum, Kanban)
• Code Review & Collaboration

Data Visualization & BI Tools

• Plotly (Dash for web apps)
• Tableau
• Looker Studio
• Matplotlib & Seaborn Graphics
• Geospatial Viz (ArcGIS, GeoPandas)
• Interactive Dashboard Design
• Business Intelligence Reporting

Research, Experimentation & Ethics

• Experimental Design (A/B,)
• Causal Inference Methods
• Quantitative & Qualitative Data
• Survey Design & Analysis
• Statistical Significance Tests
• Ethical AI & Data Bias Analysis
• Data Privacy & Security

Collaboration & Professional Skills

• Team Leadership & Mentoring
• Cross-functional Collaboration
• Stakeholder Comms & Management
• Requirements Elicitation/Define
• Project Management (Agile)
• Technical Documentation/Reporting
• Presenting (Tech & Non-Tech)
• Problem Solving & Critical Think

Familiar Technologies & Other Tools

• Java
• JavaScript
• HTML/CSS
• C++ (basics)
• PHP (basics)
• Databases (PostgreSQL, MySQL)
• Web Scraping (Beautiful Soup, Selenium)
• Apache Spark (PySpark basics)
• Jupyter Notebooks & Lab

Technology & Tinkering

• AI Research & Trends
• Generative AI (Local Models)
• Large Language Models (LLMs)
• Raspberry Pi Projects

Creative & Community

• Singing
• Playing Instruments
• Dancing
• Language Learning
• Community Engagement

“ Chosen from over 50 applicants and 5 finalists, Jack joined our organization at a pivotal moment and has been an invaluable team member ever since. As soon as they joined, they immediately took initiative on a complex survey design and analysis project that was critical to our success, bringing both expertise and ownership from day one. Jack’s approach is highly collaborative and mission-driven. They actively engage with departments across the organization, listen closely to their needs, and build thoughtful, scalable solutions—including dashboards, data quality reports, and automated systems that allow staff to focus on their core work with students. Jack is systems-oriented and consistently plans for long-term, sustainable outcomes. One standout example: Jack streamlined a survey and analysis process that previously took our team a month, developing a replicable system that now delivers actionable insights in just a few days. This perfectly captures their ability to problem-solve proactively and significantly boost our efficiency and decision-making. Beyond their technical and strategic skills, Jack is reliable, resourceful, and generous with their knowledge. They’ve led internal trainings to empower colleagues, handle ambiguity with ease, and bring a positive, solution-focused mindset to every challenge. Jack is an easy choice for any team seeking a results-driven, collaborative data scientist who elevates both projects and people. I recommend them without hesitation. ”

“ I had the pleasure of interviewing Jack before they joined the SetSail team-- I gave them a 4 out of 4. It's important to note that on our hiring scale, a 4 meant "I will flip the table if you don't hire this person." One thing that stuck with me after the interview, and which was reaffirmed while we worked together at SetSail, is Jack's enthusiasm for data science and their love of learning (and sharing what is learned). Not only is Jack an extremely capable engineer and data scientist, they are also a collaborative team player who elevates everyone around them. Their contributions at SetSail were always valuable to the company-- whether it was their huge role in our data pipeline migration, or countless bug fixes and feature implementations that directly improved our user experience, you could always count on Jack to get the job done on time, with clean code, and great documentation. I wholeheartedly recommend Jack for any data science position—they would be an invaluable addition to any team. ”

“ Jack is a sharp, human-first data person. They possess incredible passion for doing what is right and making good science happen. I highly recommend their work and their presence. ”

“ Jack was an integral part of the planning and designing of data pipeline overhaul at SetSail. Even with a moving target and many dependencies, Jack was able to adjust the design of our new pipeline, maintaining conversations across the product and engineering teams as the project progressed. They are also a fast learner and willing to dig into new technologies, which I really admired as their coworker. They would be a great addition to any team looking for a fast-learning and flexible data scientist. ”

“ Jack is a hard-working Data Scientist with a keen eye for details. Their passion for data analytics and software development really stands out when tasked with complex problems. At SetSail, Jack worked on a variety of projects that involved teasing out actionable insights from complex data sets, enhancing modeling capabilities through feature development and algorithm development, and building out a data ETL process that transformed the data infrastructure to help SetSail scale for enterprise customer needs. In addition to these technical skills, Jack's collaborative work with the engineering and product team continually earned praises from fellow coworkers. They were never shy and was always proactive to jump in and help solve a problem. I highly recommend Jack as a Data Scientist and Data Engineer for any organization. Their technical skill and work ethic will be immediately apparent upon joining any team. Feel free to reach out to me as I am happy to provide additional reference or information as desired. ”

“ I had the privilege of working alongside Jack at SetSail, and I can confidently say that they are a top-notch data scientist. Jack's expertise in data science, combined with their passion for software engineering, make them a valuable asset to any team. They have a keen ability to plan and lead complex cross functional projects and their software engineering skills are second to none. Jack's enthusiasm for learning is contagious, and they are always eager to dive into new projects and technologies. They are a great communicator and are able to explain technical concepts in a way that is easy for both technical and non-technical colleagues to understand. On top of all that, Jack is one of the kindest and most genuine people I've had the pleasure of working with. They truly care about their team and go above and beyond to support them. I highly recommend Jack for any data science or software developer role, and I have no doubt that they will excel in their next endeavor. ”

“ I am happy to recommend Jack for a variety of roles and positions. Jack is a motivated self-starter who loves to accomplish project tasks while developing and implementing smooth processes in their work environments. Jack is an accomplished leader, utilizing problem-solving skills to support their own work and the work of their colleagues and peers, taking time to ensure that their team has the skills, knowledge, and resources they need to finish their tasks and projects effectively. Jack has a wide array of skills that they readily apply to their work, and they are ready to search for answers and learn new skills to address problems that arise in their projects. Then they are ready and willing to teach peers and colleagues how to utilize those new skills, supporting team-based processes and accomplishing team projects and goals in addition to their own individual work. Jack is a leader who uses imagination, experience, and empathy to create sustainable processes and consistently complete their goals. I am happy to recommend Jack and I am confident that Jack will be a positive asset to any work that they set out to complete. ”

“ I have had the great fortune of having Jack as project lead on the SFYEAH Research Project. One word to describe Jack, I would say "Integrity", Jack holds themself to the highest standard. It shows in the work they produce, Jack is meticulous. Jack is skilled coder and data scientist, with a wealth of geospatial analysis knowledge. They are are first rate leader, and an exceptional communicator. Jack keeps everyone on the same page, and is incredibly thorough. It is an absolute pleasure to work with Jack. ”

“ Jack and I worked on the same research team and they effortlessly evolved into a pillar of leadership and direction. It's been an absolute pleasure and relief to be able to work alongside them. Jack learned quickly and worked beyond the expected and required amount to ensure deadlines and quality were kept. It truly astounded me how enthusiastic and exceptionally intelligent Jack was as I watched them surpass most of the team in their domain of expertise and knowledge in a matter of weeks. Jack's passion for details, design, and accuracy has made them one of the strongest assets on our team. Their work ethic and energy have and are contagiously inspiring and addicting to be around. Jack is just one of those people that you want on your team in every scenario because they really own the title "jack of all trades" ”