Carey takes the reins after impressing in his role as vice-captain of the Australian men’s One-Day International and Twenty20 International teams.
West End Redbacks captain Travis Head will also share the vice-captaincy of the Australia A team with Queensland’s Usman Khawaja.
The first-class day-night fixture will help selectors shape the squad for the first Test of the Australian summer against Pakistan at the Gabba on November 21.
National selector Trevor Hohns said: “We are pleased to pick a strong XI for the three-day tour match against Pakistan, several of whom were part of our successful Ashes campaign in the UK during the winter.
“We will closely monitor performances in this match as well as the coming rounds of the Sheffield Shield before deciding upon our squad for the two-Test series against Pakistan.
“Alex Carey has proven himself to be an exceptional leader in his role as vice-captain of the Australian men’s One-Day International and Twenty20 International teams.”
Australia will play two Tests against Pakistan beginning at the Gabba on Thursday, November 21 and concluding with a day-night fixture at Adelaide Oval from Friday, November 29.
Australia A XI:
Alex Carey (c) (South Australia)
Travis Head (vc) (South Australia)
Marcus Harris (Victoria)
Joe Burns (Queensland)
Usman Khawaja (vc) (Queensland)
Will Pucovski (Victoria)
Nic Maddinson (Victoria)
Michael Neser (Queensland)
Jhye Richardson (Western Australia)
Sean Abbott (New South Wales)
Riley Meredith (Tasmania)
Pakistan’s tour of Australia
October 31 – Tour match vs Cricket Australia XI, Bankstown Oval
November 3 – First Gillette T20I vs Australia, Sydney Cricket Ground
November 5 – Second Gillette T20I vs Australia, Manuka Oval
November 8 – Third Gillette T20I vs Australia, Perth Stadium
November 11-13 – Tour match vs Australia A, Perth Stadium
November 15-16 – Tour match vs Cricket Australia XI, WACA Ground
November 21-25 – First Domain Test vs Australia, Gabba
November 29-December 3 – Second Domain Test vs Australia, Adelaide Oval