The phrase "alter the role of" is correct and usable in written English.
You can use it when discussing changes to someone's responsibilities or functions within a specific context, such as a workplace or organization.
Example: "The new management structure will alter the role of team leaders, giving them more decision-making power."
Alternatives: "change the function of" or "modify the position of".
International experts said the constitution does not significantly alter the role of religion in Egyptian law.
The proposal would substantially alter the role of the Federal Reserve in protecting the economy, but the net effect would be a mixed outcome for the central bank.
GTR, however, told the Guardian that the disruption is due to the RMT's refusal to "talk to us sensibly" about the company's plans to alter the role of the guard and modernise the network.
As computer-driven forces like automation and aggregation increasingly alter the role of journalists and journalism in society, how can computation become a force of deliberate, positive social impact in journalism and civic life?" Read a summary by Brad Stenger.
Instead of holding a full debate in the House of Commons, the government will have the power to amend legislation by statutory instrument.The introduction of a rights-based system of justice will also alter the role of the courts.
A shifting dietary landscape, due to changes such as globalization and increasing emphasis on either gluten-free or whole grain foods, may alter the role of traditional and alternative cereal grains in the diet.
NBC executives said the changes would not alter the roles of Ben Silverman and Marc Graboff, the co-chairmen of NBC Universal Entertainment.
The emergence of television began to alter the roles of print media and graphic design, while also creating new opportunities for designers to work on television commercials and on-air graphics.
Personalized medicine will shift medical practices upstream from the reactive treatment of disease, to proactive healthcare management including screening, early treatment, and prevention, and will alter the roles of both physician and patient.
Predation rates of M. sexta herbivores from edge and center plants in populations indicate that populations' total HIPV emissions can alter the roles of specific volatiles for indirect defense.
