LogFAQs > #979370172

No it's not "possibly illegal" it's 100% illegal. It violates the Civil Rights Act of 1964, among other things I'm sure.

"Under the laws enforced by EEOC, it is illegal to discriminate against someone (applicant or employee) because of that person's race, color, religion, sex (including gender identity, sexual orientation, and pregnancy), national origin, age (40 or older), disability or genetic information. It is also illegal to retaliate against a person because he or she complained about discrimination, filed a charge of discrimination, or participated in an employment discrimination investigation or lawsuit.

The law forbids discrimination in every aspect of employment.

The laws enforced by EEOC prohibit an employer or other covered entity from using neutral employment policies and practices that have a disproportionately negative effect on applicants or employees of a particular race, color, religion, sex (including gender identity, sexual orientation, and pregnancy), or national origin, or on an individual with a disability or class of individuals with disabilities, if the polices or practices at issue are not job-related and necessary to the operation of the business. The laws enforced by EEOC also prohibit an employer from using neutral employment policies and practices that have a disproportionately negative impact on applicants or employees age 40 or older, if the policies or practices at issue are not based on a reasonable factor other than age."

https://www.eeoc.gov/prohibited-employment-policiespractices