Iowa does not publish or promulgate different rules for “Armed” Officers. Instead the rules are identical to Unarmed although one needs a professional permit to carry weapons.
Official Web Location for Weapons Permit

a. A person may be issued a permit to carry weapons when the person’s employment in a private security business licensed under Chapter 80A reasonably justifies that person going armed.
b. The permit shall be on a form prescribed and published by the commissioner of public safety, shall identify the holder, and shall state the nature of the employment requiring the holder to go armed. A permit so issued other than to a peace officer, shall authorize the person to whom it is issued to go armed anywhere in the state, only while engaged in the employment, and while going to and from the place of the employment.
See: Iowa Code 724.6.1

A professional permit expires twelve months after the date when issued.
See: Iowa Code 724.6.1.d

Individuals seeking employment with a licensed security business must obtain an identification card issued by the department prior to commencing employment.
See: Iowa Code 80A.7

According to the Administrative Services Division of the Department for Public Safety, individuals who are employed by a licensed security agency “must obtain an employee ID card from the department and must meet the standards established in 661 Iowa Administrative Code 2.3(80A)

See the unarmed section for details on the requirement of obtaining an employer ID card.
This section details the requirements to obtain a professional permit to carry weapons.

Applications for permits to carry weapons shall be filed with the Iowa Department of Public Safety.

Employment is required to obtain a professional permit to carry weapons.
See: Application for Iowa Permit to Carry Weapons

Fees:
$50 Application fee
$25 Renewal fee
$25 Duplicate permit
$30 Fingerprint fee

Temporary Licensure
Iowa allows the issuance of a 14 day, temporary ID card for employed security officers as the full application is being processed.
See: Iowa Administrative Code at 121.11(2)

While as a general rule Iowa requires the firm or agency to be licensed, the state does not impose the licensure requirements on out of
state firms that in the furtherance of their businesses, peripherally contact Iowa citizens or entities.

The Iowa Code states: Any private investigative, private security, or bail enforcement business shall be licensed in Iowa if it is conducting business in Iowa.

As per IAC 121.4 (2)(d), types of activities that are not, by themselves, viewed as demonstrating jurisdiction in Iowa include, but are not limited to, the following:
(1) A non-Iowa-based private investigation business works on a criminal, civil, or administrative case that originates and is filed
in another state, but that contains some investigative elements in Iowa.

See: Chapter 121: Private Investigation, Private Security Businesses

The applicant must be at least 18 years of age.
See: Iowa Code 724.8.1

Iowa Administrative Code 661-91.3(3)(a) prohibits the issuance of an Iowa professional permit to carry weapons to any person:
a.   Who is less than 18 years of age for a private security officer licensed by the Iowa department of public safety, or otherwise who is less than 21 years of age

Iowa Administrative Code 661—91.3(1) requires that those licensed and permitted to carry a weapon are legally residing in the United States or are U.S. citizens who have not renounced their citizenship.

None required

None

A professional weapons permit is required

A person armed with a revolver, pistol, or pocket billy concealed upon the person shall have in the person’s immediate possession the permit provided for in section 724.4, subsection 4, paragraph “i”, and shall produce the permit for inspection at the request of a peace officer.

See: Iowa Code 724.5.1

While the permit requirement is explicit- in order to be a security professional, who then carries a permit, must be attentive to the following:

According to Iowa Code 80A.4 (3), each employee of an applicant or licensee shall possess the same qualifications required by 80A.4 (1) for a licensee. As such, pursuant to 80A.4 (1) (f) the applicant must be of good moral character and has not been judged guilty of a crime involving moral turpitude.

While the permit requirement is explicit- in order to be a security professional, who then carries a permit, must be attentive to the following:

According to Iowa Code 80A.4 (3), each employee of an applicant or licensee shall possess the same qualifications required by 80A.4 (1) for a licensee. As such, pursuant to 80A.4 (1) (j), the applicant must provide fingerprints to the department before a license is issued.

While the permit requirement is explicit- in order to be a security professional, who then carries a permit, must be attentive to the following:

According to Iowa Code 80A.4 (3), each employee of an applicant or licensee shall possess the same qualifications required by 80A.4 (1) for a licensee. As such, pursuant to 80A.4 (1) (d) is not addicted to the use of alcohol or a controlled substance.

Iowa Administrative Code 661-91.3(1)(c) prohibits the issuance of an Iowa professional permit to carry weapons to any person: who is an unlawful user of or addicted to any controlled substance.

Iowa Administrative Code 661-91.3(3)(b) prohibits the issuance of an Iowa professional permit to carry weapons to any person: who is addicted to the use of alcohol.

Iowa Administrative Code 661-91.3(1)(d) prohibits the issuance of an Iowa professional permit to carry weapons to any person: who has been adjudicated as a mental defective or who has been committed to a mental
institution

While the permit requirement is explicit- in order to be a security professional, who then carries a permit, must be attentive to the following:

According to Iowa Code 80A.4 (3), each employee of an applicant or licensee shall possess the same qualifications required by 80A.4 (1) for a licensee. As such, pursuant to 80A.4(1)
(c)   Has never been convicted of a felony or aggravated misdemeanor.
(g)   Has not been convicted of a crime described in section 708.3, 708.4, 708.5, 708.6, 708.8, or 708.9.
(h)   Has not been convicted of illegally using, carrying or possessing a dangerous weapon.
(I)   Has not been convicted of fraud.

A person shall not be issued a permit to carry weapons unless the person has completed and signed an application on a form to be prescribed and published by the commissioner of public safety.
See: Iowa Code 724.10

Iowa Administrative Code 661-91.3(3) prohibits the issuance of an Iowa professional permit to carry weapons to any person:
(d)   Who has been convicted of a felony in a state or federal court, or who has been adjudicated delinquent on the basis of conduct that would constitute a felony if committed by an adult; or
Who is subject to a court order that:

(1)   Was issued after a hearing for which such person received actual notice and at which such
person had an opportunity to participate;
(2)   Restrain such person from harassing, stalking, or threatening an intimate partner of such person
or child of such intimate partner or person or from engaging in other conduct that would place an intimate
partner in reasonable fear of bodily injury to the partner or child; and
(3)   Includes a finding that such person represents a credible threat to the physical safety of such intimate partner or child or by its terms explicitly prohibits the use, attempted use, or threatened use of
physical force against such intimate partner or child that would reasonably be expected to cause bodily
injury; or

(f)   Who has been convicted in any court of a misdemeanor crime of domestic violence; or
(g)   Who has, within the previous three years, been convicted of any serious or aggravated misdemeanor defined in Iowa Code chapter 708 not involving the use of a firearm or explosive

None required