Professional Experience

Acorns Remote
Data Scientist / ML Engineer, Winback Model January - May 2026
  • Notre Dame Capstone Project
  • Built production LightGBM churn/winback model on imbalanced data (~1% positive rate, 126K samples).
  • Tuned with Optuna, optimized thresholds via net revenue sweep, deployed with Databricks, MLflow, and SHAP.
  • Achieved recall 0.881 and ROC-AUC 0.924 in production PySpark pipeline.
Walmart Technology, Replenishment and Supply Chain Bentonville, AR
Principal Product Manager Apr, 2022 - May, 2025
  • Led the Inventory Placement product, a mixed integer linear program to place online-only items in optimal fulfillment centers while minimizing cost, packages to the customer, and capacity constraints with a two-day delivery promise.
  • Led Target Safety Stock optimization using forward-looking demand and lead-time variability to optimize additional inventory by store, DC, and FC against carrying costs and target service levels.
  • Cross-functionally managed product goals with Engineering, Business Inventory Transformation, End-to-End Supply Chain, and Data Science teams across five time zones.
  • Coordinated with next-gen fulfillment planning, order execution, replenishment data foundation, and supply chain optimization teams to optimize node inventory across the network.
  • Approved and validated modeling and optimization methodologies with post-implementation back-testing and validation.
  • Managed and prioritized 1–12 month backlogs for Targets and Placement products across bi-weekly, quarterly, and annual planning cycles.
Walmart Labs Replenishment Bentonville, AR
Principal Software Engineer, Technical Manager, Technical (Staff) Expert Apr, 2016 - Apr, 2022
  • While on EDF, increased customer in-stock by 40 basis points and saved close to $900M in FY21 by running approximately 13B functional transactions for 500,000 store-item combinations in 2 hours 30 minutes.
  • Implemented Cassandra, Kafka, Java Spring Boot, MeghaCache, and React/Redux for the EDF product, deployed cloud-native on Walmart OpenStack and Azure intranet clouds.
  • Served as tech lead, product manager, resource manager, and technical development resource for EDF; led up to 24 direct-report associates.
  • Worked with cross-functional teams in Bangalore, Reston, VA, and Sunnyvale on Order Well, Enterprise Inventory, Transportation, Order Management, and forecasting platforms.
  • Drove Kinetica GPU DB proof of concept to production: Kafka ingestion through Spark to in-DB aggregation with REST API at under 20 ms and 110,000+ transactions per second.
  • Drove Riverbed application monitoring evaluation, eventually replaced by Dynatrace based on cost and company direction.
  • Led design and engineering architecture for On-Demand Replenishment (ODR) and Event Driven Fulfillment (EDF), a microservice-driven fulfillment and replenishment system.
  • Delivered EDF to replace GRS for products fulfilled to stores through DCs with reserve inventory stored at the DC.
  • Led and engineered Pull Forward product to optimize inbound replenishment for DC labor by smoothing demand and pulling future orders forward while guaranteeing shelf capacity.
  • Introduced the first modern topic/queue integration of Online Grocery Pickup from Walmart.com into Home Office Replenishment.
  • Led design and engineering architecture for On-Demand Replenishment (ODR) and Event Driven Fulfillment (EDF).
Sam's Club Innovations - Operations Excellence Bentonville, AR
Senior Manager, Project Manager III, Project Manager II Jan, 2011 - Apr, 2016
  • Project and design lead for Café Reinvention in Bentonville Club, delivering a 40% increase in traffic and revenue through kiosk/tablet self-service ordering.
  • Program lead for back office digitization to reduce paper in clubs; guided KPI project vision for centralized digital reporting to club operations.
  • Functional lead for Groupon-like member service offering for business members.
  • Led cross-functional teams delivering reporting and forecasting tools for club wages, inventory management, front-end efficiencies, and self-checkout.
  • Defined savings methodologies for innovations projects including club wage optimization, sales driven stocking, and front-end optimization.
  • Project lead on cross-functional initiative aligning club, market, region, and divisional daily financial and membership incentive tracking reporting.
  • Founded the Innovations team community service committee, leading 3–4 service events annually.
Walmart ISD, Replenishment & Forecasting Systems Bentonville, AR
Technical Lead Jun, 2004 - Jan, 2011
  • Project and technical lead for Demand Chain Profiling; recommended cancellation after proving accuracy gains did not translate to bottom-line benefit, saving $18M in capital.
  • GRS Reporting Workbench technical lead; led cross-functional requirements and an innovative approach to replenishment reporting.
  • GRS phase 2 technical lead for Walmart engineering, business partners, and third-party teams, reducing future development effort by 20–40 hours per process analyzed.
  • Mentored five associates formally and dozens informally; led mentoring and training circles for the replenishment area.
Washburn University Topeka, KS
WebCT Online Course Instructor / Creator Oct, 2000 - May, 2004
  • Created online courses and trained faculty and students on online courseware.
  • Facilitated training sessions for groups of 300–400 local and remote students.