Kelsey has worked in advertising for over 20 years, starting out as a strategist at agencies such as Lowe WorldWide and BBH London, before heading to Buenos Aires and finally to the US. During her career, Kelsey has worked on award-winning campaigns for the likes of British Airways, Google, Adidas, Taco Bell, Target, Uber Eats and the Me Too Movement - and has led strategic teams for various agencies. In 2021 Kelsey became a founding partner of Special US, a global independent creative agency, which launched in Los Angeles having been originally founded in New Zealand. Today she is the CEO of the agency, leading a team of 50 people across both LA and New York, for clients such as Uber, Uber Eats, Hanes, Roblox and Fox Sports among others. In 2024 the agency created the viral Super Bowl campaign for Uber Eats that featured David and Victoria Beckham.