They simply had no curiosity about things that didn't fall within their fields of expertise.

Each committee addresses issues related to its field of expertise.

Each team has a specific field of expertise, such as corruption, computer crime or fraud.

Try to use a medical specialist only within his field of expertise.

With passion and humility, a mind may consider things outside its field of expertise.

Professionals can participate and share knowledge & experience in their field of expertise.

When working in their fields of expertise, intellectuals have increased knowledge.

Experts are asking my opinion about their field of expertise.

And his particular field of expertise, if you want to call it that, is intelligence services.

Soon they would be getting into his field of expertise.