The "alternate-juror" hears the trial, in its entirety, but does not participate in jury deliberations unless the alternate replaced one of the original jurors. Each jury for a county shall be selected at random from a fair cross section of the adult citizens of this State who reside in the county.To be eligible to serve on jury duty, you must be at least 18 years of age, a citizen of the United States and a resident of Montgomery County. However, you should call 410-221-8701 every evening after P.M. to check your reporting status. If you facing a DUI matter call (215) 542-0800 for a FREE consultation. Has anyone here had it for the Montgomery County Circuit Court? Motion to Strike Out Complaint and Dismiss Action for Failure to. Trial jurors are potentially scheduled for jury service Monday through Friday. Will I serve on civil or criminal trials and what happens if I'm selected to serve on a trial? If you choose to have a jury, you should file a request for a jury trial with the Court not later than 14 days before the date on which the trial is to be held.