Beasley, who joined the team in mid-2016, has worked a number of roles for the squad including Team Principal.
Stepping into the Team Manager position, the move is aimed at taking some of the workload off Barry Ryan over a race weekend.
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“Erebus has grown rapidly on-track, now we need to follow this with our team structure and push the team to the next level,” explained Ryan, the team's General Manager.
“Streamlining our team, starting with management, is what we need to do to keep up with the positive steps we have made recently on track.
“I've known Bruin a long time and he has also been across several roles since he started working with us mid-2016.
“Bruin's extensive experience will compliment our management group and allow myself and Dennis (Huijser, Crew Chief) to focus on our own individual tasks more thoroughly.”
“I am really looking forward to the new challenge and having been part of the management team for a while now means it will be a simple and fluid transition,” added Beasley.
“I hope my previous experience will further push the team forward and take it to the level needed to match our car speed.”
The WD-40 Phillip Island 500 kicks off on Friday, with first practice beginning at 1125.