establish as

establish (oneself, someone, or something) as (something)

To confirm oneself, someone, or something's role or reputation to be something. That merger established the company as the biggest on the East Coast. I think you need to establish yourself as a tough teacher early on so that the kids actually listen to you.
See also: establish

establish someone or something as someone or something

to validate or confirm someone or something as someone or something. As soon as we establish her as a viable candidate, we will launch the publicity campaign. She established herself as an authority on rare books.
See also: establish
References in classic literature ?
Though the company, by treaty, have a right to a participation only, in the trade of these regions, and are, in fact, but tenants on sufferance; yet have they quietly availed themselves of the original oversight, and subsequent supineness of the American government, to establish a monopoly of the trade of the river and its dependencies; and are adroitly proceeding to fortify themselves in their usurpation, by securing all the strong points of the country.
It is reserved for the practical genius of Americans to establish a communication with the sidereal world.
Then, in the very midnight of this depression, poor Bell returned from England, whither he and his bride had gone on their honeymoon, and announced that he had no money; that he had failed to establish a telephone business in England; and that he must have a thousand dollars at once to pay his urgent debts.