The phrase "assure staff" is correct and usable in written English.
You can use it when you want to convey confidence or guarantee something to the staff members in a workplace context.
Example: "To maintain morale during the transition, it is important to assure staff that their jobs are secure."
Alternatives: "reassure employees" or "guarantee team members".
The purpose of the unusual gathering was to assure staff that Citi is heading into 2009 stronger than it entered 2008.
External advice can be helpful in getting this right, and could assure staff of its fairness and governors of its robustness.
When the program's best reporter, Ross Coulthart, quit, Seven West Media CEO Tim Worner was called in to personally assure staff the show would return next year, despite not having an EP or a chief reporter.
In a bid to assure staff that there will be "very few differences" between the new and old east coast franchises, the government said: "Everything is being managed to ensure that there is a smooth transfer of ownership.
For example, one interviewee spoke of her board's efforts to assure staff "that there's not a blame culture; that reporting is a good thing and it's about improvement" (executive manager, regional).
Back then, he said, the Times Company's former chief executive, Janet L. Robinson, visited The Globe and assured staff members that there would not be a sale.
The two men assured staff that they were important and apologised for the situation, according to several employees who came out immediately afterwards.
He assured staff he would not walk away from print, as more than 75% of revenue came from the 200 printed titles published in Australia and New Zealand, including the Sydney Morning Herald and the Age.
However, he assured staff there was no plan to merge the editorial operations of the Times and Sunday Times, citing strong commercial as well as editorial reasons for keeping the titles separate.
He was speedily let go by the owner of Saatchi, Publicis, whose chief executive, Maurice Levy, assured staff that Roberts's remarks were "wholly inconsistent with my own personal beliefs and values".
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