"is employed in" is a correct and usable phrase in written English.
It is generally used to refer to a job someone is doing or to work that is being done. For example, "He is employed in a local factory."
Aluminum sulfate is employed in water purification.
It is employed in four senses.
Here, the theory is employed in some diabolically inventive ways.
About one-tenth of California's workforce is employed in agriculture.
About one-fourth of the population is employed in agriculture.
Lucius Fox, Batman's equivalent to Bond's Q, is employed in technical development.
More than 10% of Britain's workforce is employed in the retail sector.
Having left prison, he continues to live devoutly, and is employed in a management position.
Today the overwhelming majority of the Belgian labour force is employed in private and public services.
The term stylistics is employed in a variety of senses by different linguists.
Some four-fifths of the Tanzanian labour force is employed in the agricultural sector.
