"these staff" is a correct and usable phrase in written English.
For example: "These staff members have been with the company for years and bring a great deal of experience to our team."
"Most doctors at these staff meetings are men.
Many of these staff members (24%) were already using e-mail with patients.
For these staff, incentives are about hoping for sufficient hours of employment to pay the bills.
These staff are finding the complex bureaucracy and centralised control difficult.
But these staff do challenging and specialised work in supporting old and disabled people.
These staff cannot and should not be stretched across seven days.
The Telegraph should be ashamed for failing to treat these staff in a more civilised manner.
4. Management can take concrete steps to deal constructively with these staff attitudes.
Safeguarding the future of these staff should be an absolute priority in the Brexit negotiations.
Anderson says that he asked whether these staff members had seen or heard anything inappropriate.
These staff canteens mainly serve train drivers and metro personnel, but are also open to public.
