Miami Beach police chief Raymond Martinez announced Buhrmaster's promotion Thursday afternoon.
Buhrmaster had been in charge of the department's Internal Affairs unit for about a year.
He fills a vacancy left by former deputy chief Mark Overton, who quit late last year to become Bal Harbour's top cop.
Buhrmaster joined the MBPD in October 2012 after retiring from the Miami Police Department where he'd been a cop since 1974.
He spent 25 years as a detective in Miami PD's homicide unit, 8 of those years as the unit's commander.