After a mediocre school career he went travelling and on his return trained as a hairdresser, initially with Vidal Sassoon which had a salon in Bournemouth.
'90 music video, which featured supermodels, including Naomi Campbell, Linda Evangelista, Christy Turlington, Tatjana Patitz, and Cindy Crawford.
Once these images started appearing in the pages of The Face, they grabbed the attention of designer Calvin Klein, who drafted Guido and Sims to transfer the ratty, anti-fashion hairstyles of London's plaid-shirt-wearing malcontents to the heads of James King and Kate Moss.
[5] Guido, along with his close friend makeup artist Diane Kendal, are considered major forces behind the grunge movement of the mid '90s, which is a look defined by its bare skin, smudged eyes, and bed-head locks.
Each season, he creates the hair look for more than 30 fashion shows, and according to a 2010 Allure article, has become one of the busiest runway stylists in the business – and the driving force behind many of the major trends.