An individual seeking an armed status must obtain a commissioned security guard license.
See: DE Code §1321(d)

It shall be unlawful for a commissioned security guard to carry a firearm unless:
(1)   The security guard is engaged in the performance of duties as a security officer or is engaged in traveling directly to or from a place of assignment;
(2)   The security guard is wearing a distinctive uniform indicating that the person is a security guard;
(3)   Such uniform has a distinctive patch that indicates the company by whom the person is employed;
(4)   The firearm is in plain view; and
(5)   The firearm is the type of weapon that the commissioned security guard qualified with pursuant to this chapter.
See: DE Code §1321(e)

Fees:
$85.00   Application and processing fee
$30.00   Firearms upgrade
$49.00   Testing fee (must be paid in advance to reserve seat)
$10.00   Replacement License
$85.00   Renewal fee

The cost for the 16 hour training varies by instructor.

See: Delaware State Police Security Guards/Firearm Guards

One must apply for a Delaware License. Delaware does not have reciprocity with any other states.

See: Security Guard FAQs

The applicant must be at least 21 years of age

See: DE Code §1315

Citizenship requirement is not mentioned in the legislation, however, the application form does ask for a Driver’s License state/number and a social security number.

See: Application form

Not required

The Professional Licensing Section may waive the 40-hour firearms training requirement depending upon the applicant’s professional credentials, training and/or work experience (i.e. prior law enforcement).

See: Delaware Code Title 24, Chapter 13, 1.0 (1.2) Firearms Policy

69 Del. Laws, c. 285, §3.;§1321 Firearms

(a)   It shall be unlawful for anyone licensed, under this chapter, to carry a concealed deadly weapon as defined in § 1442 of Title 11, unless they have been issued a concealed deadly weapons permit.

(b)   It shall be unlawful for anyone licensed, under this chapter, to ca
rry any type of weapon unless the Board has approved the use of such weapon and, if approved, the person has been trained in the use of such weapon, by a board-approved instructor.
(c) It shall be unlawful for an individual, em
ployed as a security guard, to carry a firearm during the course of performing th
eir duties as a security guard, if they have not been issued a commissioned security guard license.

See Delaware Code Title 24, Chapter 13, 1.0 Firearms Policy

Delaware Code Title 24, Chapter 13, § 1324
Anyone required to be licensed under this chapter shall be issued, by the Board of Examiners, an identification card which shall expire and be
renewable on the fifth anniversary date of the birth of the applicant next following the date of its issuance, unless the birth date is February 29,
in which event the license shall expire and be renewable on February 28 every fifth year.

Any person who has been issued an identification card by the Board of Examiners shall be required to have such card in their possession while in the performance of the person’s duties.
See: DE Code §1325

The applicant must not have been convicted of any misdemeanor involving moral turpitude.

See: Delaware Code Title 24, Chapter 13, § 1314(3)

Complete the application and send to Professional Licensing.

 According to the General application information from Delaware State Police web site:

Individuals must appear for an appointment at State Bureau of Identification. On the appointment day, individuals will come into one of our two (2) locations (Delaware State Police Troop 2/Newark or Dover) for fingerprint and picture processing. Address locations are listed below.

State Bureau of Identification – Walk-In Availability
600 S. Bay Road
Suite 1
Dover, DE 19901

Delaware State Police Troop 2 – By Appointment Only, please call (302)-739-2528
100 Cpl/1 Stephen J. Ballard Way
Newark, DE 19702
(front lobby to the left)

$89 Non-refundable processing fee

The applicant must meet and maintain the following requirements:
(3) Must not have been convicted of any misdemeanor involving a theft-related offense, drug offense, or moral turpitude within the last 7 years, and there are no more than 2 of such misdemeanors during such person’s lifetime
See: DE Code Title 24, Chapter 13 § 1314

The legislation does not designate this requirement. However, the application form includes an “Authorization to Release Information to Contributor” section in which the applicant authorizes the Division of Mental Health or any institution to release the applicant’s mental health history to the Delaware State Police.
See: Application form.

For the purposes of 24 Del. C. Ch. 13, the Board may deny an application for a license or suspend or revoke a license if the applicant or licensee has been convicted of a misdemeanor crime involving moral turpitude.
See: DE Admin Code Section 1300 6.2.1 for a full list of offenses.

The applicant must not have been convicted of any misdemeanor involving a theft-related offense, drug offense, or moral turpitude, within the last 7 years, and:

a.   There are no more than 2 of such misdemeanors during such person’s lifetime; and

b.   No misdemeanor conviction occurred during or as a result of employment in a capacity regulated by this chapter.

(4)   Must not have been, as a juvenile, adjudicated delinquent for conduct which, if committed by an adult would constitute a felony, unless and until that person has reached his or her twenty-first birthday;
See: DE Code §1314

No person will be issued a license unless that person submits, to the State Bureau of Identification, their name, Social Security number, age, race, sex, date of birth, height, weight, hair and eye color,
address of legal residence and the provision of such other information as may be necessary to obtain a report of the person’s entire criminal history record from the State Bureau of Identification and
a report of the person’s entire federal criminal history pursuant to the Federal Bureau of Investigation appropriation of Title II of Public Law 92-544.
See:DE Code §1313(b)

Not required