"of the work required" is correct and usable in written English.
You can use it to describe a set of tasks that someone is expected to do. For example, "I need to finish all of the work required of me by the end of today."
Think of the work required to make just one Justin Bieber.
"The truth is, the traditional commonwealth grant funding approach cannot guarantee the scale of the work required.
It provoked a feeling I can only describe now as muffled rage, as though appreciation of the work required my complicity in and sanction of something shaming.
And Mr. Clinton was making noises about running — and doing some of the work required for a run — long before that.
The 2010 international exposition was a major boon to the city, in terms of the work required to prepare and the highly successful operation of the event itself.
That Labour achieved so much in office hardly makes up for the painful feeling that we let the Tories back in with so much of the work required of us left undone.
Not all the work required of a sound designer is so elaborate.
The illicit nature of the work requires bribes of vodka to the police and to possible informants; but, as we see, there are more pressing dangers.
Finally, the structure of the work requires handovers and close work with non-ICU staff.
Support workers could help qualified health workers in the form of job substitution, by implementing some of the work requiring less competence but working towards the goals prescribed by professionals [ 23].
Continued expansion of the works required a second bridge to be constructed in 1922, to carry the railway over the river channel.
