"external people" is correct and can be used in written English.
It is typically used to refer to people from outside an organization or group who have been brought in to provide a particular service or support. For example, "We have decided to hire external people to provide additional IT support."
The documents show 23 external people are working at Decc.
Maybe it was more important for other, external people.
People internal to Tor are likelier than external people to say they don't like the US government funding model".
I do not think we should allow external people, who have a vested interest in prescribing and medication, freedom of access to your notes.
Mistakenly thinking General Dannatt had been appointed merely to advise the Government, he added: "We've seen too many appointments of these external people".
We have made exceptions for people who excel in some areas but not others, but our goal for both internal and external people in the role is that they try to achieve the complete expectations of the role.
Drawn from the journals Greene kept on his travels in West Africa, the book examines the internal as well as external maps people use to chart their experiences.
There is little data on the long-term use of tDCS, and some experts worry is that in addition to serious external burns, people who self-administer could permanently damage their brains, impairing cognitive and motor function in subtle and not-so-subtle ways.
It shows the high end of external exposures what people would receive if they didn't evacuate after the accident and didn't follow advice to stay indoors.
You will have to pay your internal or external IT people to perform these upgrades.
But with external reliability people want to sense a level of integrity.
