Charlie Appleby is set to take over at Godolphin's Moulton Paddocks yard following former trainer Mahmood Al Zarooni's eight-year ban.
Long-time Godolphin trainer Saeed bin Suroor has been overseeing matters at the yard in recent weeks following Al Zarooni's admission he administered anabolic steroids to a number of horses in his care.
However, with his own Godolphin Stables too, Bin Suroor currently has responsibility for nearly 400 horses in Newmarket, prompting Sheikh Mohammed to look towards Al Zarooni's former assistant Appleby.
He started an an official training course on Monday, which he must complete before being licensed by the British Horseracing Authority.
"It's impossible for Saeed to train so many, so Sheikh Mohammed would like Charlie Appleby to step in while he considers what arrangements he makes long-term," Godolphin racing manager Simon Crisford told The Daily Telegraph.