The decision came after just 30 minutes of closed session. The vote split 5-2 with places 2 and 7 Trustees Mary Bone and Danielle Weston voting against.
His reinstatement will be effective 8 a.m. March 25, according to the motion put forth by board President Amber Feller.
The vote comes after several months of investigation by multiple entities, including the Travis County Sheriff's Office, the Texas Education Agency and an outside investigator hired by the district at the direction of its monitor, David Faltys.
Community Impact Newspaper received a statement from Azaiez via his lawyer, Mary Goodrich Nix, regarding the vote.
"I am very pleased with the board's decision to allow me to return to serve the students, staff, and parents in the Round Rock community as the superintendent of the Round Rock ISD," Azaiez said.
Ahead of the vote, trustees shared the sheriff's office had closed its investigation into allegations made against Azaiez in a protective order last year.
Prior to the vote, Bone expressed concerns about the investigation into Azaiez, stating she had not been able to verify communications that it had been closed.
Feller said Bone's reasoning was not correct because the board received clear confirmation of the closure.
Weston said for her to vote "yes" on reinstatement, it "would require the willing suspension of disbelief."
Public commenters spoke both for and against the reinstatement of Azaiez ahead of the board's vote.