'I want to bring it a private sector mentality,' said Scobie. 'It needs a target-oriented attitude, looking to benefit both the volunteers and the organisations at which they are placed.'
Scobie said recruitment in Scotland was challenging because many people lived in remote, rural areas.
ProjectScotland launched last year to promote volunteering to 16 to 25-year-olds, offering £55 weekly subsistence and pooling the resources of 120 charities.
A forthcoming campaign aims to make volunteering appealing to youth and highlight the benefits of having voluntary work on a CV.
The project is supported by, among others, Scottish Power, Lloyds TSB and Standard Life. Affiliated charities include the YMCA, the Royal Caledonian Curling Club and the Forestry Commission.
While at P&G, Scobie was responsible for the launch of Vicks First Defence, which became the fastest-selling UK cold remedy. He has been replaced by Julia Redman, an internal promotion.
Scobie succeeds ProjectScotland interim marketing director Alan Blunt, who remains with the group.