The Law Office of Donald J. Arnold has successfully represented clients at all levels of the Maryland State Court system, including the Court of Appeals, the Court of Special Appeals, various Circuit Courts, various District Courts, various Orphan's Courts, and various administrative courts including the Office of Administrative Hearings, Workers' Compensation Commission and Maryland Tax Court.

The primary locales served by our office are Harford County, Cecil County, Baltimore County and Baltimore City, although we can represent a person having a case in any county of Maryland.