Chaz Mostert will continue his long association with engineer Adam De Borre in 2020, Walkinshaw Andretti United has confirmed.

De Borre is moving with Mostert from Tickford to WAU, in a deal labelled critical by the Holden squad’s co-principal Mathew Nilsson.

Since debuting in the Supercars Championship midway through 2013 at Dick Johnson Racing, Mostert has had De Borre in his corner for all bar a single season.

The ability to continue that relationship is understood to have been a key part of Mostert’s WAU deal, but has only been officially announced today.

“It’s wonderful to have Adam join the engineering group here at Walkinshaw Andretti United,” said Nilsson.

“He has a fantastic pedigree in motorsport, and will certainly add to the experience of the group as we look to continue our progression.

“Having that stable relationship with Chaz is also critical.

“There will be a lot of new elements for Chaz to adjust to early on in the season, so to have that familiarity between the two of them is a huge bonus, and a formula that is proven.”

Adam De Borre

Mostert’s only Supercars season without De Borre came in 2016, which remains the driver’s only winless Supercars campaign.

De Borre spent that season at DJR Team Penske before being brought back into the Tickford fold the following year.

“It’s really exciting to be joining such a strong and experienced group at Walkinshaw Andretti United in 2020,” said De Borre.

“It’s a team with so much history and I can’t wait to add to with Chaz.

“To be able to stay with Chaz for the start of our seventh season together is fantastic and I hope all the experience gained over the past six seasons will help us guide the car to the front.”

Mostert and De Borre competed against each other in last weekend’s Bathurst 12 Hour; the former driving a BMW and the latter engineering the #2 Valvoline Audi.