Lynn, who raced with the Envision Virgin Racing squad in FE’s 2017-18 campaign after making a one-off debut at the New York round the previous year, took a best finish of seventh at Bern during his time with Jaguar last season after joining mid-way through the year as a replacement for Nelson Piquet Jr.
Jaguar will need a replacement driver for this season’s Sanya FE round as James Calado will miss the event to race for Ferrari in the clashing FIA World Endurance Championship round at Sebring, but Lynn is unavailable due to his own WEC commitments with Aston Martin.
Motorsport.com understands that Jaguar will take a decision on who will race alongside Mitch Evans at Sanya closer to the event.
“I am familiar with the championship, the team, their goals and how they work. I look forward to playing my part in helping the team achieve their objectives."
Jaguar team principal James Barclay, added: “Mitch Evans and James Calado are an exciting combination and they will be strongly supported by Alex throughout the season.
“Alex is not only a very talented and accomplished driver, he also has valuable experience in Formula E and a great relationship with our team.
“That experience and relationship will be highly beneficial to our ongoing development.
“Winning races can only be achieved if you have a hard working, talented team around you. Bringing Alex back into the fold helps us achieve that.”