Under its acting director, Baltimore County’s biggest department sees an exodus of senior staff

Herself not a licensed engineer, D’Andrea Walker is bringing in personnel that lack qualifications, critics say. County Executive Johnny Olszewski expresses “full support” for his public works chief. Increasingly over the past year, turnover of senior staff at Baltimore County’s Department of Public Works and Transportation has been raising eyebrows – so much so that when asked about it, one county insider responded, “Oh, you mean the mass exodus?