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Zack Reneau-Wedeen
Head of Product at Sierra, focused on building enterprise-ready AI agents with work on Agent Studio and the Agent Data Platform; advocates for 'context engineering', robust simulations, and production-grade voice AI.
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Dec 10, 2025
• 1h 4min
How Sierra AI Does Context Engineering
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Zack Reneau-Wedeen, Head of Product at Sierra, shares insights on revolutionizing AI with context engineering, prioritizing real-world testing over traditional methods. He reveals how AI often feels like a moody coworker and discusses the importance of robust simulations to enhance reliability. Zack advocates for abandoning decision trees in favor of goal-oriented frameworks and explains how Sierra trains graduates to be product-engineering hybrids. He also emphasizes the significance of customer focus to improve AI agents and discusses innovative strategies for scaling and fine-tuning voice interactions.
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