The phrase "a certain level of competence" is correct and usable in written English.
It can be used when discussing the required or expected degree of skill or ability in a particular context or field.
Example: "To qualify for this position, candidates must demonstrate a certain level of competence in project management."
Alternatives: "a specific degree of skill" or "a particular standard of ability."
And her computer-generated essay indicated, among other things, a certain level of competence.
Members of the committee rejected the idea that all applicants should reach a certain level of competence on English, Welsh or Gaelic.
The advent and evolution of the IPL surely means that all 10 in the field must now reach a certain level of competence that was beyond one or two of those playing for India in the 20th century.
However, composition and performance are at the heart of most degrees, and the majority of universities will require students to have reached a certain level of competence in vocal or instrumental skills.
It's not unwatchable — CBS being the last broadcast network that enforces a certain level of competence and coherence in its shows — but it's irrelevant, a wholly generic sitcom so divorced from its source material that you have to pinch yourself to remember it had anything to do with the Internet, or with the world after 1985.
Moreover, in their experience, the task of training employees in foreign language skills was made easier by the requirements in that training in job-specific English skills could reliably assume that candidates already possess a certain level of competence.
Inevitably a certain level of technical competence is needed to make microhydro systems work properly, and equally inevitably the lack of standardization rules out economies of scale.
By completing a four-year degree, students could signal to potential employers that they had a certain level of cognitive competence and could carry out assigned tasks and work in a group setting.
"Unlike the Republican agenda," Bill Galston, of the Brookings Institution, recently told Politico, "the Democratic agenda does not work unless people have a certain level of trust in the competence of the government to act on their behalf".
In the example that follows, there is a certain level of distrust that students show in the level of competence and expertise that teachers occasionally display.
In addition to adequate knowledge and resources, the health care staff needs to have a certain level of clinical activity to be able to maintain competence and skills.
