The phrase "at this highest level" is correct and usable in written English.
It can be used to refer to the utmost degree or peak of a particular standard, quality, or achievement.
Example: "The research findings indicate that the project was executed at this highest level of excellence, surpassing all previous benchmarks."
Alternatives: "at this peak level" or "at this utmost level".
She said she was "overwhelmed and thrilled at this highest level of appreciation" from the judging panel, headed by director Kamal Swaroop and approved by India's ministry of information and broadcasting.
Argentina's football fans have been asking each other one question since the semi-finals: "Who do you want to win, Tevez or Messi?" The rivalry between them has been the subject of media scrutiny for some years now, and there's something particularly poignant about these two facing each other at this highest level of club competition, at this stage in their careers.
At this "highest" level of the hierarchy, the Member States act through the heads of States and governments assembled in the European Council, the national constitutional courts and national parliaments in their treaty-making capacity, while at the "lowest" level, they act through their executive organs and their courts.
He said that he had had doubts for quite a while about having the energy to continue at this highest level of the sport, and he finished by saying, "There are many other beautiful things in life that you can do," aside from racing.
Again question marks about his use of the ball at this highest level of the game.
"At this highest level, you just do not get away with anything and you've got to be squeaky clean.
That's truly impressive at this high level.
But no, I don't think it exists, not at this high level".
Why? What, at this high level of gadgety sophistication, is the point of an invisible car?
Playing at this high level, with the best players in the world, they force you to improve.
"So if we feel that he can play at this high level, then he's going to play".
