Tonia studied law in the 1980s at Cambridge University and Guildford Law School. She then practiced law for nearly 30 years; firstly, in the City law firm Linklaters and then, for over 20 years, at Unilever (the consumer goods company). At Unilever Tonia progressed up the ranks of the legal function with her last two roles being Chief Legal Officer and Group Company Secretary.
In 2019 Tonia completed the Professional Certificate in Coaching at Henley Business School.
As well as coaching and mentoring, Tonia has a number of non-executive and advisory roles.