An off-duty Protective Services Officer (PSO) was allegedly detected drink driving in Mooroolbark on Thursday evening.
The officer from Transit Safety division entered a booze bus site on Manchester Road about 11.45pm on Thursday 24 July.
The 40-year-old underwent a preliminary breath test, returning a positive result.
He underwent an evidentiary breath test, returning an alleged reading of .094.
He was issued a penalty notice and has had his licence suspended for six months.
Professional Standards Command have been notified as is standard practice.
