Rachel Spector Whiffin

Head of People and Culture @Sleep.ai

Carlsbad, CA, US

Sleep.ai is the global leader in AI-powered sleep improvement, trusted by top health, wellness, and digital health brands to unlock the transformative power of sleep.As Head of People & Culture, I built and lead the global HR function across the U.S. and Ireland — serving as a strategic business partner to the executive team while overseeing all aspects of the employee lifecycle in a fast-moving healthtech environment.Key impact:• Scaled HR infrastructure from early-stage startup to a multi-country global operation across the U.S. and Ireland• Raised Glassdoor ratings to 4.1/5 through culture-building, leadership development, and stronger employee communications• Reduced HR operational costs by 40% via HRIS modernization, process automation, and digital HR transformation• Strengthened leadership pipelines and drove measurable improvements in engagement and retention• Supported international expansion including product launches in Germany (DeinSchlaf) and new digital health partnerships (HearMe integration)• Led global talent acquisition across product, engineering, and commercial functions