Kubica, who is Alfa’s reserve driver, will take over Kimi Raikkonen’s car for opening practice on the Sakhir race track on Friday.
The former F1 driver from BMW Sauber, Renault and Williams drove a BMW in the DTM this season after leaving Williams in late 2019.
He has attended three more training sessions for Alfa so far this season after joining the squad earlier this year.
Kubica’s other training appearances took place in the opening phase of the late season, starting with the Styrian GP, a week later in Hungary and then with the FP1 for the 70th anniversary GP in Silverstone.
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“I’m very happy to be back in the driver’s seat for the first time since August,” said Kubica.
“It may sound like a long time, but my season was really busy with my simulator work at the factory and my DTM program, so it actually felt like it was going pretty fast.
“Now that my DTM season is over, I want to return to my role at Alfa Romeo Racing full-time. There is still a lot to struggle and I am confident that my work will make a positive contribution to the team’s efforts. “
Alfa team principal Frederic Vasseur said: “We are all delighted that Robert is back in the car for FP1.
“His contribution to the team has been important so far this season. To get the most out of his experience and skills here in Bahrain, the team will continue on their current path.”
“Sakhir is a track that he knows very well and that will really help our work this weekend.”
Raikkonen will return to the cockpit of his C39 for the remainder of the weekend in Bahrain.
This weekend’s race will be held at the Sakhir circuit with the usual 3.362 mile layout before continuing the F1 season in the same location next week for the return leg of the campaign’s final triple header.
This race will take place on the shorter, 2.277 mile outside loop configuration.
