Ryan Briscoe will return to Panther Racing for this weekend's IndyCar race at Milwaukee.
The pair are expected to make ongoing appearances over the balance of the season as the team looks for a full-time replacement for JR Hildebrand, with whom it parted ways after Indianapolis.
"We're excited to have Ryan Briscoe back this weekend," Panther's John Barnes said.
"It was great to work with him a few weeks ago in Detroit and he obviously knows his way around the Milwaukee Mile, so we feel like we'll be able to have a good weekend.
"We're working on getting him signed for several other races this season, so hopefully we'll have that finalised in the short term future."
Briscoe said that he expects to settle back in to the team environment quickly.
"I felt like the team gelled really well when we worked together in Detroit and I'm sure we'll be able to pick right up where we left off this weekend in Milwaukee," Briscoe said.
Servia has already been confirmed to drive the car at Iowa next weekend, with Briscoe's availability being subject to his existing sportscar commitments with Level 5 Motorsport.