Oh, hey!
I'm Brittany Sierra.
I help forward-thinking sustainability leaders drive adoption across product, marketing, and retail by designing around real human behavior.
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Most sustainability teams build programs around what consumers say they'll do, which is why most programs make sense on paper and underperform in practice.
I work with sustainability leaders in fashion to help you translate your sustainability work into language leadership will fund, redesign programs for actual participation, and understand the behavioral mechanics behind why consumers do or don't act.
How to Work With Me.
The Adoption Audit
A focused engagement to pinpoint why your sustainability efforts aren’t converting and what to change first.
You’ll leave with: a clear diagnosis, messaging and positioning fixes, and a participation roadmap your team can execute.
Best for: launches, underperforming programs, and teams struggling to show ROI.
Book Your Audit ↗Team Workshop
A behavioral-science-led session to align sustainability + marketing around what drives action, not just awareness.
You’ll leave with: shared mental models, program friction + incentive mapping, and next-step experiments to increase participation.
Best for: teams that need alignment and a consumer-first strategy.
Book a Workshop ↗Strategic Advisory
Ongoing thought partnership to pressure-test strategy, sharpen positioning, and protect budget and influence internally.
Best for: senior leaders who need a strategic partner, not another vendor.
Apply for Advisory ↗
Get in Touch.
