Skip to content
Zach O'Donnell

Case studies

Work that changed a commercial decision

Featured engagements first. Additional analysis lives further down the page.

Pricing & Profitability Transformation

Used cross-channel pricing, cost, volume, and margin analysis to redesign pricing and profitability decisions across a $50M+ e-commerce business.

Approximately 25% growth in net sales in one year, with approximately 15% lower unit volume, alongside better margins and a more efficient operation.

Read the full case study

Amazon Advertising Optimization & Automation

Analyzed and supported strategy for more than $5 million in annual Amazon advertising spend, then built the optimization system that made those decisions repeatable.

ACOS improved from above 16% to 14.5% with higher net sales. Manual optimization work dropped by approximately 60–80%.

Read the full case study

COGS & SKU Profitability Engine

Took an Excel MVP for product cost and turned it into a production application covering standard products and a very large custom catalog.

Teams could see cost and margin at a product level that a maintained spreadsheet could not cover.

Read the full case study

Executive Scorecard & Forecasting

Built the weekly business review: shared KPIs, variance and trend context, and a forecast the leadership team could use to choose follow-up actions.

A trusted weekly forum for performance, forecast, and the short list of actions that followed.

Read the full case study

League Island

A product I own end to end: organizers run registration, competition, and communication in one place instead of a pile of spreadsheets and chat threads.

A live product that covers the league lifecycle, not a demo of a single bracket screen.

Read the full case study

Additional work

Supporting analyses that fed the engagements above. They are not equal in scope to the featured case studies.