[3][4] After graduating from the Birmingham University in 1981 (BA, French), she moved straight into the world of advertising where she joined Allen Brady Marsh.

[citation needed] In 1983, she moved to Ogilvy and Mather before leaving for Abbott Mead Vickers nine years later.

[citation needed] On the board of BBDO Worldwide, Comic Relief and Birmingham University, she was appointed a CBE for services to advertising in 2009.

[7] In February 2013 Snowball was listed as one of the 100 most powerful women in the United Kingdom by Woman's Hour on BBC Radio 4.

[13] She was appointed Dame Commander of the Order of the British Empire (DBE) in the 2017 Birthday Honours for services to advertising, diversity, and equality.