The phrase "a powerful role for" is correct and usable in written English.
It can be used when discussing the significance or impact of a particular role or position in a specific context.
Example: "The new policy creates a powerful role for community leaders in shaping local governance."
Alternatives: "an influential position for" or "a significant role in".
He is attracted to East Asia's development model, with a powerful role for the state.
There is a powerful role for public agency and public spending, but it is much less directive, statist and top-down than traditional left thinking.
But without a powerful role for urban government and stronger leadership at local level, little may happen despite the government's best intentions.
But Mr Patrick's plans are more ambitious, with a powerful role for his insurance commissioner and a bolder plan to redirect most spending from fee-for-service models by 2015.
There is a tension between the policy of the NHS as preferred provider and a powerful role for local voluntary organisations, and it is not clear that Labour has fully risen to the funding challenges set out in the recent Five Year Forward View".
Overall, future digital design and manufacturing will embrace the challenges and opportunities in the Industry 4.0 era in line with the SMAC phenomenon (Social Networking, Mobility, Analytics based on Big data and Cloud computing) which is increasingly playing a powerful role for future innovative design and manufacturing.
A critical cardiovascular disease (CVD) risk factor for patients with type 2 diabetes is cardiorespiratory fitness (CRF), and considerable evidence suggests a powerful role of CRF for predicting all-cause and CVD mortality (1).
Mrs. Heinz Kerry has a track record of not mingling in politics, and she's a powerful role model for women and for future "First Gentlemen".
It was deeply validating to realize that I'd given my son a powerful role model for prizing ambition and intention, for creating a life based on passion.
That's a powerful role model for a daughter to have, but an even mightier one for a son.
In religious traditions, symbols play a powerful role, identifying for people elements that lie at the heart of their faith.
