“A master at blending timeless grace with today's fast-paced world, Mariah is on a mission to help us all standout, live intentionally, and exude confidence in every interaction.” ~ Frances Valentine
Meet the Founder
As a certified etiquette trainer, Mariah Grumet Humbert is on a mission to bring an intentional sparkle back to a lost art. She believes etiquette is much more than just a set of rules– it is a powerful tool to help individuals build confidence, create stronger connections, and distinguish themselves. In her pursuit to redefine the meaning of etiquette, she helps her clients master the nuances of various social and professional situations with authenticity, consideration for others, and a strong level of emotional intelligence.
Mariah founded Old Soul Etiquette in 2021 when she left her career in fashion to pursue her lifelong passion: empowering others to shine their light through her approachable and vibrant take on etiquette. Today, she works with individuals and organizations across the globe, offering private consulting, interactive workshops, webinars, and keynotes on topics such as social, dining, and business etiquette, first and lasting impressions, personal branding, the art of conversation and small talk, the power of your professional presence, and more. Her clientele spans a diverse range of industries, including high jewelry, finance, real estate, hospitality, entertainment, and beyond. Mariah is based in New York City and is available to travel by request.
Mariah is also the author of the modern wedding etiquette book, What Do I Do? and The Essential Wedding Planner (coming late 2025). Her expertise has been sought after by The Today Show, NBC News, Fox News, Forbes, Southern Living, The New York Post, Travel & Leisure, Brides, Martha Stewart, and more.
Some of Mariah’s favorite things include her family, a hot cup of tea, I Love Lucy, long walks, vintage fashion, a big bowl of pasta, The Marvelous Mrs. Maisel, any Frank Sinatra song, Paris, antique shopping, and of course, New York City.
Certifications & More
Graduate of The English Manner and Beaumont Etiquette’s Train the Trainer Grade One Program
Certified in Corporate and Youth Etiquette Training through The Protocol School of Palm Beach
Member of The International Etiquette Trainer Society led by The Protocol School of Southern California
Bachelors Degree in Fashion Merchandising through The University of Delaware Department of Fashion and Apparel Studies
Page Photography: DeVoss Photography
