Hartwig Masuch decides to move up his retirement date, with Thomas Coesfeld assuming the top job in July instead of January.
Also this week: Exceleration Music hires two senior-level executives, Ground Control Touring brings on a veteran booking agent and more.
Musk will transition to the roles of executive chairman/chief technology officer.
Chris Brown, Katie Robinson and Johnny Minardi have been promoted at the Warner Music Group labels.
Strickland, who succeeds Rick Shedd in the position, previously served in executive roles at Warner Music Nashville and opened Marathon Talent in 2018.
The veteran executive is departing the streaming company after nearly two years on the job.
Gregg Nadel will now helm the label solo as Easterlin steps into a consultancy role at Warner Music Group's artist services division WMX.
Also this week: gamma. taps Sipho Dlamani and Naomi Campbell in MENA expansion, AWAL appoints a U.K. executive leadership team and more.
"We are transitioning to new leadership at a time of strength to ensure the company continues its momentum," said Gibson board chairman Nat Zilkha.
Bernstein will move into an advisory role by the end of the year.