Line Beauchamp is heading to Paris where she'll serve as the province's representative at UNESCO.
Beauchamp held the communication, environment and education portfolios at various times during her 14-year political career.
The former deputy premier resigned her post and seat in May 2012 during the height of the student unrest over tuition fee increases.
The 51-year-old Beauchamp had recently been working as a strategic adviser.
Quebec has several delegations, bureaus and trade offices around the world.
Beauchamp was one of several appointments made by Premier Philippe Couillard following a cabinet meeting on Wednesday.
Former Liberal minister Christos Sirros is heading to London, where he'll be Quebec's new delegate.
He had most recently been Quebec's delegate in Brussels.
Sirros was a Liberal member of the legislature for 23 years and held cabinet positions under ex-premiers Robert Bourassa and Daniel Johnson.