Free flu vaccinations are available to County employees while supplies last through Occupational Medical Services (OMS). The Clinic location is 27 Courthouse Square, Suite 180, use the E. Jefferson entrance. Employees must make an appointment and bring a County ID. Appointments can be requested by emailing OMS.Appt@montgomerycountymd.gov. Flu Vaccination Clinic Office Hours are Monday through Friday 10:00 AM to 1:30 PM (while supplies last). Free parking is available with a County ID at the COB parking lot. The back lot of the OMS location is closed for parking.