Applicants must be a U.S. citizen, a U.S. non-citizen national, or a qualified alien.
As an employer, you may require the services of a noncitizen to work at your company or business. If the individual is already a permanent resident (Green Card holder), you may hire that individual, but you must comply with the employment verification requirements.
In general, you must be a U.S. citizen or national (residents of American Samoa and Swains Island) to work for the federal government, but there are some exceptions.
While specific industries, such as defense contracting, may impose citizenship requirements due to federal mandates, most roles are accessible to qualified Green Card holders.
Foreign remote contract workers don't require visas because they are based outside of the US. While these workers may have to come into the country occasionally to fulfill their contractual obligations, they shouldn't have any issues entering as long as they can provide proof that their stay will be temporary.
Many contracts now include clauses requiring team members to be U.S. citizens, but not always. If you're involved in work requiring a secret or top-secret clearance, it's a no-go for non-U.S. citizens. Even if you have multiple passports, you might be asked to give up the non-U.S. ones.
While the US federal government is more restrictive in regards to hiring people who are not American citizens or US nationals, Green Card holders can work in state and local governments for a range of positions.