White has been in her current role at the National Magazine Company title since 2000, but no date has been fixed for her to take over from Baker.
White said fashion would remain a key part of the magazine's offering under her editorship.
Over the past three years, Company has pushed its coverage of real-life issues further to the fore. But it remains wedded to coverage of high-street shopping, entertainment, celebrity and health for its core readership of women under 30, whose interests reflect the fact that they are unlikely to have a mortgage or dependents.
'We are interested in stuff that's relevant: jewellery, clothes, drink, shopping, gyms - all the things integral to the world of women in their twenties.
But we want to ensure that when they get to 29 they don't stop reading,' White said.
She urged PROs to be creative with their pitches. 'We don't really do interiors and we don't do cooking. There is no point phoning me up with a new fridge. But think laterally: if you're a food PRO, we sometimes feature food in our health pages. Similarly, if you are in interiors, ask if we would ever use them in a fashion or feature shoot.'
A search for White's successor has not yet begun, and she said no changes in editorial staff or sections were planned just yet. 'We will be changing, but slowly,' she said. The magazine was revamped this year, shrinking in size and following the lead of Conde Nast's Glamour. White reports to publishing director Justine Southall.
Before joining Company, White was deputy editor of B from 1998. Prior to that, she was Los Angeles bureau chief for Pacific Publications for a year. She began her career on Inside Soap in 1995 before moving to Australia as launch editor of the now-defunct Inside TV magazine in 1996.