About

Sandy Madden,

Founder & Principal

Hi there!

I’m Sandy Madden, and I founded The Yellow Dart to help organizations make sense of their data. With 10+ years of experience in data strategy, visualization, and operational improvement, I design solutions that turn complex information into clear, actionable insights.

I’ve built dashboards that reveal hidden trends, streamlined reporting processes that save hours each week, and developed financial and operational models that help leaders plan with confidence. My approach is practical, collaborative, and focused on delivering results you can actually use.

Why work with me?

Reliability & Accuracy

I honor commitments by delivering what I promise, when I promise it. Clients trust me to follow through with unwavering consistency and precision.

Clarity Through Structure

I transform complexity into simplicity through logical, methodical processes. Every project follows a clear framework that makes data insights accessible and actionable for everyone.

Solutions-First Mindset

I focus on possibilities, not obstacles. Every challenge is an opportunity to find creative, effective paths forward.

Energy & Optimism

I bring enthusiasm and positivity to every project. Data work doesn’t have to be dull. I balance professionalism with an upbeat approach that makes collaboration both productive and enjoyable.