William Ellis Email and Phone Number
William Ellis work email
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William Ellis personal email
Experienced data scientist with a passion for applying predictive analytics, data analysis and visualization to help solve business challenges. Skills include: • Data science technology incl Deep Learning (esp NLP - incl LLM/Gen-AI), Machine Learning (regression, classification, clustering/unsupervised methods) and statistical methods (incl A/B testing, causal inference)• Database technology including SQL, Exploratory Data Analysis, ETL, data wrangling and cleansing• Development of compelling, insightful data visualizations (esp w/Tableau)• Effective presentation of complex technical subjects to executive-level leadership
Blue Cross Nc
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- unitedhealthgroup.com
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Senior Data Scientist, Risk AdjustmentBlue Cross NcNew York, Ny, Us
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Senior Manager, Data Analytics (Nlp Team)Unitedhealth Group Mar 2023 - PresentUs• As individual contributor, hands-on, technical NLP team leader, perform validation/integration of an LLM NLP model which infers medical ontological disorders/findings from Electronic Health Records (EHR) – incl statistical testing (e.g., odds-ratios, NER precision/recall), feature engineering of extracted concepts for inclusion in downstream ML models, utilizing embedding models/vector databases for similarity matching of EHR’s and claims (Python, Pytorch, Hugging Face, SciPy, Chroma, Snowflake, RAG).• Regularly present NLP/LLM technical concepts and progress to executive-level leaders. -
Principal Data AnalystUnitedhealth Group Sep 2020 - Mar 2023Us• Developed a classification model predicting medication adherence among plan members – impactful on both patient care and plan revenue (Python, Keras, Tensorflow, Scikit-learn, Jupyter, Numpy).• Collaborated with principal data scientists in feature selection and statistical testing of an XGBoost classifier predicting CAPHS/HOS healthcare experience survey responses (R, PySpark, Hive, Azure).• Developed Tableau visualizations, including analysis and ETL, for clinical and business stakeholders related to medication adherence, diabetes care, HEDIS consumer sentiment surveys, care gaps analysis, HCC and RAF scores - utilizing clinical, MA, pharmacy, claims and survey data.• Promotion from Senior Data Analyst role.
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Business Intelligence AnalystUnitedhealth Group Aug 2018 - Sep 2020Us• Led a team in an Optum Machine Learning competition modeling members’ primary care physician switching behavior using a logistic regression classifier.• Developed a suite of self-service apps which relieve developers of time-consuming Tableau administrative tasks such as publishing/refreshing dashboards/data sources – dramatically increasing team productivity (Alteryx, Python, REST API, Tabcmd).• Technical Presentations: “Utilizing the Hyper API with Python” (2020, UHG Tableau Users Group), “Data Densification in Sparse Data Situations” (2019, UHG Tableau Users Group); "Batch Macros" (2020, UHG Alteryx Users Group).• Promotion to a lead senior analytic position.
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Senior It AnalystUnitedhealth Group Nov 2016 - Aug 2018Us• Developed an ARIMA time-series model forecasting project management metrics for use by program managers.• Developed insightful Tableau dashboards visualizing software program and project management KPI’s and metrics.
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Senior Data AnalystJersey Mike'S Subs Apr 2016 - Nov 2016Manasquan, Nj, Us• Developed a model used by management to provide real-time analysis of JM's loyalty rewards program trends - as well as a classification model for fraud detection (Random Forests, Excel, SQL). • Developed SQL query scripts and leveraged ETL tools to extract and cleanse production data for analysis and reporting. -
Data Analytics ConsultantIndependent Consultant Sep 2014 - Mar 2016London, Gb• Meridian Health, Inc., Wall, NJ: Migrated a repository of health marketing data from Excel spreadsheets to a database, developed SQL scripts, created dashboards/visualizations (Excel, SQL).• IFS Technology Solutions, Hasbrouck Heights, NJ: Analyzed leasing finance data and designed reports/visualizations for major equipment leasing finance companies. ETL, data cleansing, SQL development (MS SQL Server, SQL).
William Ellis Skills
William Ellis Education Details
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New Jersey Institute Of TechnologyComputer Science -
Nyu Stern School Of BusinessMarketing Research
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Montclair State UniversityEnglish
Frequently Asked Questions about William Ellis
What company does William Ellis work for?
William Ellis works for Blue Cross Nc
What is William Ellis's role at the current company?
William Ellis's current role is Senior Data Scientist, Risk Adjustment.
What is William Ellis's email address?
William Ellis's email address is el****@****zon.net
What schools did William Ellis attend?
William Ellis attended New Jersey Institute Of Technology, Nyu Stern School Of Business, Montclair State University.
What are some of William Ellis's interests?
William Ellis has interest in Hiking, Nba Basketball, South/central America Adventure Travel.
What skills is William Ellis known for?
William Ellis has skills like Microsoft Sql Server, Databases, Sql, Ssrs, Tableau, Report Writing, R, Ssis, Etl, Business Intelligence, Mongodb, .net.
Who are William Ellis's colleagues?
William Ellis's colleagues are Michele Garwood, Jessica Morris, Aline Reis, Brian Flory, Shinu Elias, Irene Romero, Melissa Pena.
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