"certain level of expertise" is a correct and usable phrase in written English.
You can use it when referring to a subject matter or activity that requires a high degree of skill or knowledge. For example, "To really excel in this sport, you need to have a certain level of expertise."
Both require a certain level of expertise to understand.
"It will be extremely difficult for health workers to accurately identify cases through door-to-door screening as this requires a certain level of expertise.
Unless you possess a certain level of expertise in storage devices, power electronics and motors, you won't control your own destiny.
These experts include C-level executives, doctors, scientists, educators, journalists, and anyone else who has fostered a certain level of expertise in various verticals.
In addition, but depending on local conditions, it may also be desirable or even required that the medical physicist in radiology acquires a certain level of expertise in MRI, ultrasound imaging, and nuclear medicine.
However, the assessment results from both methods are shown to be strongly dependent on the Weibull exponent which determination requires a certain level of expertise in the field of fracture mechanics.
Amateur gunsmiths have made lower receivers for years, in metal, although the process requires a certain level of machining expertise.
The question has been raised by the American Institute of Certified Public Accountants, which has floated a proposal to create an internationally accepted credential certifying a certain level of finance expertise.
Managing a residential network nowadays means configuring the functionality provided by the residential gateway, which is often a task that requires a certain level of technical expertise that most residential users lack.
Customers without a wireless network or an Xbox can still watch downloaded Vongo movies on a TV if it is connected directly to their PC, a process that requires a certain level of technical expertise.
In [19] CSCs need a certain level of security expertise to specify their requirements, while in CARAM this is not necessary: CSCs only need to specify acceptable risk levels for security, privacy and service categories, while still allowing a more fine grained specification.
