John Cornwell

Background

About John Cornwell

As a senior leader with expertise spanning finance, operations, and commercial strategy, I drive sustainable margin growth, enhance cross-functional collaboration, and lead high-impact business transformation initiatives. I have successfully navigated complex restructurings, steered multi-billion-dollar P&L decisions, and implemented commercially innovative strategies that strengthen market position. Beyond financial leadership, I am deeply engaged in stakeholder management and served as a global ambassador [Ogilvy] for many years, representing the business across media and industry. Passionate about leadership development, I also mentor high-potential talent and champion initiatives that foster inclusive, high-performing teams. I have extensive international experience leading financial and operational transformation in dynamic, fast-paced creative agencies. With a proven track record of driving strategic, people-focused change, I specialise in optimising commercial performance, embedding digital innovation, and delivering sustainable business growth. I am now working on a fractional basis. I partner with early-stage and scaling businesses in a range of strategic roles — from Board Advisor to fractional CFO — helping founders navigate the complexities of capital raising, strategic planning, and commercial growth.