Class "D" Security Officer License Requirements Any individual who performs the services of a security officer must have a Class “D” license. Eligibility Requirements for your security license: To qualify for a license, you must: Be at least 18 years old. Be a citizen or legal resident alien of the United States or have been granted authority to work in this country by the Department of Homeland Security, U.S. Citizenship and Immigration Services. Training/Experience You must submit proof of successful completion of a minimum of 40 hours of professional training provided by a security officer school or training facility licensed