Guilherme De Gregori Decimo

Senior retail media leader with 6+ years scaling Amazon Ads, DSP, and AMC operations at Quartile — grounded in a civil engineering background that shaped a systems-first, controls-driven approach to auditing complex accounts. Designed and led a company-wide audit and assurance framework — four pillars covering Mastery, Strategy, Framework, and Account Health — deployed across 500+ accounts, contributing to cutting client churn from 8% to under 4% in under 12 months. Directed the AMC and DSP strategy behind a Partner Award-nominated challenger-brand turnaround: DSP spend scaled 8.8x, total sales grew 45% YoY, and new-to-brand customers grew 62.8% YoY — with the account team executing against the plan. Led a cross-channel specialist team of 5 (2 on Amazon, 3 on Google DTC), and built two proprietary AI audit agents that sustain a 3-audit/day cadence without added headcount. Operate at the intersection of analytical rigor, campaign architecture, and executive communication.