The phrase "a range of duties" is correct and usable in written English.
It can be used to describe a variety of tasks or responsibilities that someone is expected to perform in a job or role.
Example: "As a project manager, I have a range of duties that include overseeing the team, managing budgets, and ensuring deadlines are met."
Alternatives: "a variety of responsibilities" or "a spectrum of tasks".
The occupation authorities have hired hundreds of private security guards for a range of duties.
He rose steadily through the Navy ranks, handling a range of duties.
She and her colleagues have a range of duties, including page turning.
Obviously, during the course of a week the janitor will be involved in a range of duties that involve working on both eligible and ineligible service charge activities.
American and Afghan officials say that they are confident they can keep the militias under control and that the militias can carry out a range of duties, like providing intelligence on Taliban movements that American and Afghan forces can act on.
Alexander Gerst, Samantha Cristoforetti, Thomas Pesquet, Andreas Mogensen, Luca Parmitano and Timothy Peake will now be given a range of duties within the agency.
On occasion, an employee may wish to consider transferring to another position at the Institute which has a range of job duties and responsibilities equal to his or her current position.
At a pledging conference in Brussels next week, and then at the EU's Nice summit in early December, the guidelines will be set for the 60,000-strong force that the EU's governments have promised will be ready for a range of active duties by 2003.
During Victoria's last years, Louise carried out a range of public duties, such as opening public buildings, laying foundation stones, and officiating at special programmes.
Each free text description was reviewed and a coding scheme developed (by AWC), which included descriptions of a range of workplace duties.
Public authorities, including those with public health responsibilities, have a range of existing duties in relation to disabled children and their families.
