From the Epilepsy Foundation website....

There are no federal laws barring people with epilepsy from working as a firefighter, police officer, correctional officer or in other law enforcement officer (LEO) jobs. In fact, federal civil rights law, and many state laws, may protect your right to work in these professions. Some private organizations do, however, recommend that LEOs and firefighters meet certain medical requirements as a precondition for employment. These requirements, which have the effect of excluding many people with epilepsy from serving as a firefighter or LEO, have been adopted by many fire and police departments across the country. We believe such blanket policies violate federal civil rights laws and many state civil rights laws.

It is strongly suggested employers - whether career or volunteer - consult legal counsel regarding this matter. 

Read more from the Epilepsy Foundation by clicking on the link below.