Bio
Rosie Guest is Chief Marketing Officer at CUBE. Recognised as a “CMO to Watch in 2026” and named among Marketing Week’s Top 100 Most Effective Marketers (2023 & 2024) and Fintech Marketing’s Top 30 Most Influential Marketers (2025), she has led marketing across high‑growth and private‑equity‑backed environments. She is also a member of the Forbes Communications Council.
Before joining CUBE, Rosie scaled the global marketing function at Apex Group as the business expanded from 300 to more than 13,000 people through rapid growth and acquisition.
Her work has been recognised with Marketing Lead of the Year at the 2023 Investment Week Marketing and Innovation Awards and Disruptor of the Year at the 2020 Women in Finance Awards. She is the founder of the Women’s Accelerator Network, supporting women and advancing diversity across the industry.
Rosie specialises in strategies that deliver measurable growth in scaling, PE‑backed organisations, combining strategic clarity with a commitment to inclusion.