AceShowbiz - Britney Spears' father has hired a new lawyer. Nearly a month after he was officially suspended from the "...Baby One More Time" hitmaker's conservatorship, Jamie Spears reportedly replaced his previous attorney, Vivian L. Thoreen, with Alex Weingarten.

The 69-year-old filed new legal documents on October 15 to have Alex, a partner in the litigation department at Willkie Farr & Gallagher, handle his conservatorship battle against his pop star daughter.

On the reason why Jamie needs a new representation, a source shared to PEOPLE, "[Britney's new lawyer] Mathew Rosengart has asserted numerous times that he is going to investigate and sue Jamie." The source added, "If/when he does, Jamie will need to defend and likely be adverse to parties in the conservatorship."

"Vivian told Jamie he'll need a different litigator and that she and H&K weren't interested in that role," the insider further claimed. "So Jamie authorized Vivian to help him find a strong litigator, which she did."

Despite no longer working with Vivian, Jamie allegedly is "pleased with the work done" by her firm, Holland & Knight. The unnamed source additionally noted that "he and Vivian remain in close touch during the transition."

Jamie, who had previously asked to step down from his role as Britney's conservator, was suspended from her conservatorship on September 29. To replace him, Los Angeles County Superior Court Judge Brenda Penny appointed a certified public accountant named John Zabel as temporary conservator of her estate.

Jamie has insisted that the conservatorship should end immediately. However, Britney's lawyer Mathew wants Jamie to be investigated first for possible misappropriation of assets. Jamie, however, has previously denied allegations of misconduct.

Britney's next court hearing is set for November 12. It will likely determine whether the conservatorship, which has dominated the singer's life for 13 years, will be terminated altogether.